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<-- back to L-series Engine Swap

Datsun L-series four-cylinder engine major components

Overview

L-series engines, from a performance standpoint, are based on the engine size (doh!) but also the cylinder head type.

Contrary to many engine types, the highest performing L-series heads can actually lower performance when swapped onto different engines. This is because of the piston dish controlling compression ratios, and the best heads have large combustion chambers. Often times the good heads need flat-top pistons to create the right compression ratio.

So choose wisely.

Heads are commonly discussed by the casting marks, such as "A87" or "W58". However, there can be big variations of each raw casting. The raw casting is machined in different ways, so, for example, the A87 casting might be machined into an A87 Part Number or a U20 Part Number. The common advice usually is local advice, which parts are common in the local area, and import engines sometimes throw a wrench into this advice.

Small valve heads
* 38mm IN 33 EX from engines L13,L14,L16,L20,L24
* 220 head casting common on Datsun 510 L16 engine

Large valve heads
* 42/33 L16E,L18,L20B,L26
* 42/35 L18,L24E,L20B,L26
* 44/35 L28,L28E,L28ET six-cylinders

Fuel Injection heads
* L16E
* L18E

Intake Manifold

Nissan Violet

Datsun Bluebird

Single Carb

14002-A8901 MANIFOLD ASS'Y-intake L14S.V 710 [1980.05 catalog]
14002-A8903 MANIFOLD ASS'Y-intake L14S.V F/COLD 710 [1980.05 catalog]
- 14035-U0101 GASKET-manifold L14S.V 710
14002-A8925 MANIFOLD ASS'Y-intake L14,L16S 710 [1974.2 catalog]
14002-A3419 MANIFOLD ASS'Y-intake LPG 710 [1974.2 catalog]
- 14035-U0101 GASKET-manifold L14, L16S 710
14004-A3500 MANIFOLD-exhaust L14, L16S 710 [dual outlet]
- 20711-A0800 GASKET-exhaust tube 710

14004-U9500 MANIFOLD-exhaust L14S.V 710

Twin Carb

Datsun Bluebird 510: 
Datsun Bluebird 610: 
Nissan 710: 1973-1975 only (L16T SSS)
Datsun Bluebird 910: Europe

510 SSS, CSS

14002-22026 MANIFOLD ASS'Y-intake L16T, L18T 510
- 14035-U2800 GASKET-manifold L16T, L18T
  - replaced 14035-23000 GASKET-manifold L16T, L18T
14004-A3500 MANIFOLD-exhaust L16T, L18T
- 20711-A0800 GASKET-exhaust tube 510 ALL

610 SSS

14002-22026 MANIFOLD ASS'Y-intake L16T, L18T 610
14002-K1425 MANIFOLD ASS'Y-intake (from '73-4) L16T, L18T 610
- 14035-U2800 GASKET-manifold L16T, L18T (from '72-11)
  - replaced 14035-23000 GASKET-manifold L16T, L18T
14004-A3500 MANIFOLD-exhaust L16T, L18T 610 [dual outlet]
14004-U9500 MANIFOLD-exhaust L16T, L18T (from '75-7) 610 [dual outlet]
- 20711-A0800 GASKET-exhaust tube 610 ALL

710 SSS

14002-K1425 MANIFOLD ASS'Y-intake L16T 710 [1974.2 catalog]
- 14035-U2800 GASKET-manifold L16T
14004-A3500 MANIFOLD-exhaust L16T 710 [dual outlet]
- 20711-A0800 GASKET-exhaust tube 710

910 Bluebird SSS (Europe, 0180-1283)
14002-K1412 MANIFOLD-INTAKE L18T
* 14035-U2800 GASKET-MANIFOLD <> 14035-U2810
14004-U9501 MANIFOLD-EXHAUST
* Same as L16S, L18S and 720.L18

Weber

Datrally¹²⁰⁰ twin-DCOE manifold
Post 477820 Post click for topic Post click for topic

EGI

14002-N6950 MANIFOLD ASS'Y-intake L16E 710 EGI -7601 [1980.05 catalog]
14002-U7652 MANIFOLD ASS'Y-intake L16E 710 EGI 7601- [1980.05 catalog]
- 14035-N6900 GASKET-manifold L16E 710 [1980.05 catalog]

14002-N1400 MANIFOLD ASS'Y-intake L16E P710FE, P710WFE (SSS) EGI [1974.2 catalog]
14002-N1400 MANIFOLD ASS'Y-intake KP610TE (SSS) EGI [1974.2 catalog]
14002-N1400 MANIFOLD ASS'Y-intake L16E, L18E 610 EGI [1975 catalog]
- 14035-N1401 GASKET-manifold L16E 710 [1974.2 catalog]

14004-N6901 MANIFOLD-exhaust L16E 710 -7601 [dual outlet] [1980.05 catalog]
14004-U7600 MANIFOLD-exhaust L16E 710 7602- [dual outlet] [1980.05 catalog]
14004-N5800 MANIFOLD-exhaust L18P 710 7602- [dual outlet] [1980.05 catalog]
14004-N7000 MANIFOLD-exhaust L18P 710 -7512 [dual outlet] [1980.05 catalog]
14004-N7001 MANIFOLD-exhaust L18P 710 7601-7703 [dual outlet] [1980.05 catalog]
20711-A0800 GASKET-exhaust tube 710

Exhaust Manifold

N58 exhaust ports are round (L18P Japan, 1978-1980 North America)
All others are square
A square manifold will work on a round port head (barely) better than the other way around.

Some late manifolds are 4 into 1 with a single large round connection to the down pipe
Most others are 4 into 2, with two outlets into a twin-pipe down pipe

Standard L16/L18 cast iron extractor is 4-into-2 and have an exhaust shop make up a 2-into-1 exhaust pipe, tuned to whatever RPM length you want to rev your engine.

fits 1200
lasts forever
no exhaust leaks
quiet

Post 478208

Downpipes need to be custom-made to fit Sunny

dual-outlet gasket 20691-A0880

PB110 L14
14035-U0101 GASKET > 14035-U0101 > 14035-21000
14004-A3500 MANIFOLD

510 Japan
14053-21000 L13/L14S/L16S [small inlet port]
14053-U0101 L14S/L16S [small inlet port] > 14053-U0101
14053-28000 L16T/L18T [large inlet port] > 14004-23000
14004-21000 L13 early
14004-A3500 L13/L14S/L16S + L16T/L18T

610 JAPAN
* all square port
14035-U0101 L16S/L18S > 14035-U0100
14035-U2800 L16T/L18T > 14035-U2300
14035-N1401 L16E/L18E [single top bolt, notched] > 14035-N1400
14004-A3500 <> 14004-U9500 [Dual-outlet, divorced]

810 JAPAN
14004-W0300 L18P -7611
14004-N5800 L18P 7612-7901
14004-U7600 L18E   [dual outlet, divorced]
14004-U9500 L16S.V [dual outlet, divorced]
14004-U9656 L16S.S,K+L18S [single outlet, heat riser]
14035 MANIFOLD GASKET TO CYLINDER HEAD
14035-U0101 L16S.V -7709
14035-U0105 L16S.V 7710- > 14035-U0105
14035-U6700 L16S.S,K+L18S 7709-
14035-W5300 L16S.S,K+L18S 7710-
14035-U6700 L18P -7611
14035-N5800 L18P 7612-7702
14035-W5800 L18P 7703-
14035-N6900 L18E

A10 JAPAN
* all square port
14035-N6900 L16E [notched]
14035-U6700 L16S -7709
14035-W5300 L16S 7710-7803
14004-W5500 L16E [dual-outlet, divorced]
14004-U9655 L16S [single-outlet, heat riser]

720 USA
14004-N5800 round port, air injection, single outlet
14035-W5800 round port > 14035-W5801

N58 round port
* L18P
* late L20B USA

L20B USA with air injection
1975-1977 U67 head square ports Heat Riser type
1978-1980 W58 head round ports divorced type

N58 L20B USA late

L20B USA early (square port with air injection)

A26 manifold

230 manifold

A21 with EGR port

14035 Manifold Gasket

#W58 Round exhaust ports

Square Exhaust port
* small round intake port
  Nissan U01
  Nissan U28
* large round intake port
  Nissan U67
  Nissan W53

#U01/210/K07 Square exhaust ports (small round intake port)

#W53/U67 Square exhaust ports (large round intake port)

#U28 Square exhaust ports SPECIAL (large round intake port)
☁

EFI Notched intake port 
* Nissan 14035-N6900
* Nissan 14035-N1401
* Cherry S8354K (14035-N1401)

N14 early EFI with notched intake ports for L16E and L18E engines

14035-U0115

U01/210/K07 Square exhaust ports (small round intake port)

14035-U0115ᴳ/14035-U0105/14035-U0101/14035-U0100
Replaces 14035-21000
         14035-K0700

Victor Reinz MS15241
 * Nissan 14035-U0100/14035-U0101/14035-U0105/14035-U0115
 * Nissan 14035-U2800/14035-U2810

14035-U2800

Version of U01 with large intake ports

14035-U2810ᴳ GASKET-MANIFOLD <> 14035-U2800
* 910 Bluebird SSS (Europe, 0180-1283)
* Nismo

☁

14035-W5300

A4035-W5301ᴳ/14035-W5301/14035-W5300 MANIFOLD GASKET
replaces: 14035-U6700

Square exhaust ports (large round intake port)

Fel-Pro MS226931

14035-W5800

W58 Round Exhaust Port
* JDM L18P
* USA L20B 1978-1980

14035-W5801ᴳ/14035-W5800 MANIFOLD GASKET
* Fel-Pro MS22801

Round exhaust ports

Head Gasket

GASKET-CYLINDER HEAD
* small bore: N22
* big bore: U08

COMPETITION HEAD GASKET
* 11044-U0820 87mm bore, 1.5mm thick, 9cc
* 11044-A7650 88.5 mm, 1.5mm

11044-U0800

11044-U0804ᴳ GASKET-CYLINDER HEAD
Replaces: 11044-U0800/11044-U0802/11044-U0803
* L18
* L20B

11044-N2216

Type N22/210/A86

* L16/L14/L13
11044-N2216ᴳ GASKET-CYLINDER HEAD
Replaces 11044-A8600
         11044-21007/11044-21005/11044-21004(REINZ)/11044-21003/11044-21002(REINZ)/11044-21001(ISHINO)
         11044-N2215(REINZ)/11044-N2214/11044-N2212/11044-N2210
         11044-N2203(ISHINO)/11044-N2202/11044-N2200

Aftermarket Head Gasket

Aftermarket head gaskets are often one-size-fits-all: they fit big bore (L20B & L18) and small bore (L16, L14 & L13) engines.

FEL-PRO 21178PT
* 86.1mm bore diameter
* 1.07mm thickness
* interchange
  11044-21001
  11044-A8702
  #11044-N2215
  #11044-U0800/11044-U0802/11044-U0803/11044-U0811

Camshaft

Japan Market

13001-21000 CAMSHAFT L13, L16 510 1967-1970, L14 510 1971, L14 710
13001-21000 CAMSHAFT L16 510 1969, L14S B110
13001-21010 CAMSHAFT L14S B210 [early], L16S 710
13001-H2700 CAMSHAFT L16S 510 1972, L14T B110, L16S B210, L16S 710 1976-, L16S 610, L18S 610, L16S 810.V.MT 7808-, L18S 810 -7807, L16S 810 -7807, L16 A10
13001-H2710 CAMSHAFT L14T B210, L18S 610
13001-N7200 CAMSHAFT L14S 710 1976-
13001-23000 CAMSHAFT L16 510 1971, L16(LPG) 1972, L16(LPG) 710, L18P 710, L18P 810
13001-22000 CAMSHAFT SSS, CSS [L16T] 510 1969-, L16T 710, L16E 710, L16T 610, L18T 610, L16E 610 [late], L18E 610 [late], L18E 810
13001-U4210 CAMSHAFT L16E 610 [early], L18E 610 [early]
13001-E3001 CAMSHAFT L20AS 810 -7702
13001-E3082 CAMSHAFT L20AS 810 7703-
13001-P3000 L20AE 810 -7702
13001-P3081 L20AE 810 7703-
13001-U8680 L16S.V.AT 810 7710-

North America Catalog

13001-21000 CAMSHAFT L13 510
13001-23000 CAMSHAFT -0571 521, 620 -0872, L16 510
13001-H2700 CAMSHAFT 521 [late], L16 510
supercedes 13001-H2710 CAMSHAFT 0671- 521, L16 510
13001-U2010 CAMSHAFT L16 620 0972-, L18 710, L18 610
13001-U2000 CAMSHAFT L16 620 0972-, L18 710, L18 610
13001-22000 CAMSHAFT L18 620, L20B 620, L20B A10, L20B 710, L20B 610, L20B S10, L20B 720

NISSAN COMPETITION (from 1984 catalog)

13001-22000 SSS CAMSHAFT (.413/248°)
99996-D1023 RALLY CAMSHAFT (.475/270°) 109° lobe centers, requires .160" lash pads
99996-D1022 SLALOM CAMSHAFT (.490/290°) 109° lobe centers, requires .160" lash pads, competition springs
99996-D1025 #196 RACE CAMSHAFT (.530/306°) 102° lobe centers, requires alternate las pads, competition springs, spray bar
99996-D1024 #273 RACE CAMSHAFT (.630/306°) high-lift version of 99996-D1025
99996-D1029 CAMSHAFT BILLET/UNDRILLED

Cylinder Head

"Letter" heads are those with the cast ID starting with a number, such as A87, U67, etc.
"Number" heads are those with the cast ID consisting only of numbers, such as 210 or 219 (these are the older heads)

The ID marks are based on the Applied Model Code, and designate which Datsun model the part was originally designed for. For example, type "210" is the Applied Model Code for 510 Standard (1967).

219 designed for P510 [510 with 1600 engine]
A87 designed for H510TK [510 with 1800 twin-carb engine]
U67 designed for 610 1976

Valve sizes intake/exhaust (mm)
38/33 L13,L14,L16,L20,L24
42/33 L16E,L18,L20B,L26
42/35 L18,L24E,L20B,L26
44/35 L28,L28E,L28ET

L16 best heads
* Economy: 210 head
* Power under 5,000 RPM: 210 head
* Power over 5,000 RPM: shaved U67 head

L20B best power/torque
* U67 head 
* W58 head round exhaust port

210 head small ports and valves for best fuel economy
- 9.2 compression ratio when used on L20B
219 head with matching twin-carb manifold for L16
U67 head on L20B for most power/torque
- low 7.86 compression ratio when used on L16 (8.4 with head milled 0.80mm)
A87 head (closed chamber) is good on either an L16 or an L20B, but has smaller ports/valve than U67
- 8.39 compression ratio when used on L16
- 10.68 compression ratio when used on L20B
A87 head (open chamber)
- low 7.86 compression ratio when used on L16 (8.4 with head milled 0.80mm)
- 8.4 compression ratio when used on L20B (8.9 with flattop pistons)

Open Chamber vs. Closed Chamber

What is a closed chamber head? One where the combustion chambers are small, for the quench effect in conjunction with flat-top pistons.

A closed chamber (kidney-shaped or peanut-shaped)
B closed chamber (heart-shaped)
C Open chamber
D closed chamber (deep sunken)
☁

The classic closed chamber is less likely to ping with low-octane fuel ("regular" pump gas).

Datsun used open chambers and closed chambers sometimes in the same year in the USA.

Best power:   closed chamber
Best torque:  closed chamber
Best economy: closed chamber

So why use open chambers? Because closed chambers spike the NOx emissions. Open chambers reduce it. So while Datsun, for the USA market, generally moved to open chambers starting in 1971, they occasionally used closed chamber heads along with more EGR to reduce NOx. The 1970s were a time of trying all methods to reduce emissions yet keep power high.

So, are open chambers junk? No. They can make good power too. Generally, the best L20B head is the large-valve, large-port open chamber U67 head.

Compression Ratio

Datsun used the combination of the head's combustion chamber size (CCs) and the piston dish to set the compression ratio, and the best heads have large combustion chambers.

So when swapping heads, to get the most performance often times the good heads need flat-top pistons to create the right compression ratio. Or you could compromise and use whatever ratio it ends up being. Low compression ratios (below 9:1) will run good. 9 to 10 will make more power. And 11:1 requires "Premium" pump gas but make the most power.

8.25:1 good for "Regular" fuel 87 octane R+M/2
10:1   demands  "Midgrade" fuel 89 octane
11:1   requires "Premium" fuel 91 octane pump gas
12:1 to 14:1 generally requires racing gas 100 plus
* Octane numbers vary by region

These figures are for aluminum heads as used by Datsun. Big 'ole american iron with cast iron heads cannot do as well on pump gas. And some of the new 2024 cars have 14:1 compression, yet run happily on pump gas. But for old school carbureted, aluminum-headed engines, these figures are a good starting point.

Going from 9:1 to 11:1 increases power about 4%, so 4hp on an L20B engine. But unlike most engine mods, the extra power from more compression applies to all RPMs and all throttle conditions. It truly is a great way to increase both power and econoomy.

Head Cast Numbers

Early heads the casting # is on the front, under to the side of the inspection cover. And usually covered in grime. Some heads have two cast marks, e.g. "A87" on the side and "219" at the front of the head, below the timing chain inspection plate.

☁

Type 210
11041-21000/11041-22100 HEAD ASS'Y-cylinder L14S,L16S 510
* Valves small 38mm IN, 33mm EX
* Intake ports small round 1.125"
* open chamber 38.5cc OR closed chamber 37cc (1968 USA)

Type N21
11041-N2100/11041-N2102/11041-N2103 HEAD ASS'Y-cylinder L14S,L16S 510
* Valves small 38mm IN, 33mm EX
* Intake ports small round

Type A87
(closed chamber) JDM engines
11041-A8712/11041-A8713/11041-A8714 HEAD ASS'Y-cylinder L16 510 (JDM 1972)
11041-A8714 HEAD ASS'Y-cylinder L14T B110 (JDM)
11041-A8714 HEAD ASS'Y-cylinder L14T B110 (JDM)
11041-A8713/11041-A8714 HEAD ASS'Y-cylinder L14T B210 (JDM)
* closed chamber "peanut" combustion chamber
* Valves medium 42mm IN, 33mm EX
* Intake ports medium round 1.250"
(notched intake ports) JDM EFI engines
* Valves large 42mm IN, 38mm EX
(open chamber) USA engines

Type 219
11041-21900/11041-21901 HEAD ASS'Y-cylinder L16T 510
* L16T twin-carb head used by the 510 SSS
* Intake ports medium round 1.250"
* Valves large 42mm IN, 35mm EX
* Quench combustion chamber (peanut-shape) 40cc

Type V219
Nissan Competition #11041-U0600A SSS CYLINDER HEAD
* Intake ports large round 1.50" version of #219

Type N04
11041-N0400 HEAD ASS'Y-cylinder L18T 510
* L18T twin-carb head used by the 510 SSS
* U60/U67 dry manifold
* W58/N58 round port exhaust, wet manifold

Type N58
* Similar to #W58 open chamber

Type U60
USA 610 L20B service head
* Identical to #U67

Type U67
11041-U6700/11041-U6701/11041-U6702 USA 620 L20B
* Valves large 42mm IN, 35mm EX
* Intake ports large round 1.375"
* Open combustion chamber 45.2cc
* Dry manifold (no coolant holes in the head's manifold face)

Type W58 L20B
* Quench combustion chamber (peanut-shape) or open combustion chamber (1979 USA 200SX)
* Round exhaust ports
* Exhaust port liners

Type W53
JDM L16, L18, L18E
11041-W5380 L16S 7708- JDM A10
* Quench combustion chamber (peanut-shape) 41cc
* Intake ports medium round 1.250"
* Similar to #A87 (closed chamber)

Type N56/N58
* Similar to #W58

OS Giken

16-valve head

Main: DOHC Heads

Australia

V91 head is from a Series 2 Bluebird
42mm inlet valves 
35 exhaust valves
open chamber
45cc chambers

Japan

510

Datsun 510 Bluebird

C-091 1967-1970 HEAD ASS'Y-cylinder
11041-21000 L13
11041-22100 L16

C-201 1967-1970 HEAD ASS'Y-cylinder
11041-21000 L14
11041-22100 L16, NP [L14.TAXI.3-speed]
11041-N0400 SSS [L16T, L18T]

C-223 1970-1971 HEAD ASS'Y-cylinder revision 1974.3
11041-21000 L14S, L16S
11041-22100 L14S, L16S, LPG < 11041-21000
11041-N2100 L14S, L16S < 11041-22100
11041-N2102 L14S, L16S (from '72-12) < 11041-N2100
11041-N2103 L14S, L16S < 11041-N2102
11041-21900 L16T
11041-21901 L16T < 11041-21900
11041-A8712 L16 (from '72)
11041-A8714 L16 < 11041-A8712
11041-N0400 L18T

610

Datsun 610 Bluebird U

C-265 HEAD ASS'Y-cylinder
11041-A8714 L16
11041-A8716 L16 (from '75-5) <> 11041-A8714
11041-A8717 L16 (from '76-3) <> 11041-A8716
11041-U0602 L18
11041-U0604 L18 (from '75-4) <> 11041-U0602
11041-U0605 L18 (from '75-10) > 11041-U0604
11041-U0606 L18 (from '76-3) <> 11041-U0605
11041-N1403 L16E, L18E
11041-N1407 L16E, L18E (from '75-4) <> 11041-N1403
11041-N1408 L16E, L18E (from '75-10) > 11041-N1407

710

Violet

C-426
11041-H7602 L16S
11041-H7700/11041-H7701/11041-H7702 L16E
11041-N2103/11041-N2015 L14S.V
11041-N680E L18P
11041-N7100/11041-N7101 L14.S,K
11041-W0380 L18P

720

Datsun Truck

L18
11041-U8880
11041-V9182 <> 11041-U8880

910

Bluebird

L16S
11041-U8680
11041-V9181 <> 11041-U8680

A10

JDM A10 Violet/Auster/Stanza

L16 used until 7803, then replaced by Z-series
11041-H7602 L16S -7707
11041-W5380 L16S 7708-
11041-H7702 L16E -7707
11041-H5580 L16E 7708-

CAMSHAFT 
13001-H2700 L16

VALVES
13201-A1100 VALVE-INTAKE L16
13202-N6800 VALVE-EXHAUST L16E
13202-21002 VALVE-EXHAUST L16S

GASKET-MANIFOLD TO CYLINDER HEAD 
14035-N6900 L16E
14035-U6700 L16S -7709
14035-W5300 L16S 7710-

B110

1971-1973 L14-powered Sunny Excellent

L14S (single carburetor)
11041-H2512 L14S (from '73-7)
* superseded 11041-H2511 (from '73-4)
** superseded 11041-H2510
CAMSHAFT
 13001-21000 L14S
VALVES
 13201-A3500 INTAKE L14S
 13202-21002 EXHAUST L14S

L14T (twin carburetor) w/dual valve springs
11041-A8714 L14T (from '73-7)
* superseded 11041-A8713 (from '73-5)
** superseded 11041-A8712 (from E/#L14-098246)
*** replaced 11041-21901
CAMSHAFT
 13001-H2700 L14T
VALVES
 13201-A1100 INTAKE L14T
 13202-23001 EXHAUST L14T

B210

* 1973-1975 L14-powered PB210
* 1976-1977 L16-powered GB211

PB210 Single Carburetor
11041-H2510 L14S
11041-H2510 L14S (from '73-4)
11041-N2103 L14S (from '74-11)
11041-N7100 L14S (from '75-10)
 CAMSHAFT
  13001-21010 L14S
  13001-21000 L14S > 13001-21010
 VALVES
  13201-A3500 INTAKE L14S
  13202-21002 EXHAUST L14S
  13202-23001 EXHAUST L14S (from '73-4)
  13202-21002 EXHAUST L14S (from '74-11)

PB210 Twin Carburetor
11041-A8713 L14T <> 11041-A8714
11041-A8714 L14T (from '73-4)
 CAMSHAFT
  13001-H2710 L14T
 VALVES
  13201-A1100 INTAKE L14T
  13202-23001 EXHAUST L14T

Nissan Competition

13001-22000-SV SSS CAMSHAFT (.413"/248°)

11041-U8880 HIGH-COMPRESSION CYLINDER HEAD
* 41cc/12.5" intake ports
* Valves: 42mm intake, 35mm exhaust
11041-D1161 COMPETITION CYLINDER HEAD
* Ported & Polished

11044-U0820 COMPETITION HEAD GASKET 87mm bore, 1.5mm thick, 9cc
11044-A7650 COMPETITION HEAD GASKET 88.5 mm, 1.5mm

13201-A1100 INTAKE VALVE 42mm (Stock L16SSS/L18SSS)
13201-E4620 INTAKE VALVE 42mm factory modified for improved flow
99996-M1030 42mm polished & tuliped
13201-N4200 44mm stock L28 valve
99996-N1100 COMPETITION 44mm polished & tuliped

13202-23001 EXHAUST VALVE 33mm stock L16
99996-M1040 COMPETITION 33mm polished & tuliped
13202-N0401 35mm Stock L16SSS/L18SSS
99996-D1034 COMPETITION 35mm polished & tuliped

Nissan Competition

11041-U8880 HIGH-COMPRESSION CYLINDER HEAD
used with any high performance Datsun engine utilizing a stock intake manifold. It has a 41cc combustion chamber and 1.25" diameter intake ports. Valve size is 42mm/1.65" (intake) and 35mm/1.38" (exhaust).
11041-U0600A SSS CYLINDER HEAD

Used with any high performance Datsun engine utilizing an SSS/SU or Mikuni/Solex intake manifold. Specifications are the same as 11041-U8880 except that intake port diameter is 1.5".
99996-D1162 COMPETITION CYLINDER HEAD
Recommended for racing purposes only. Completely ported, polished and fitted with 44mm/1.73" intake valve seats and 35mm/1.38" exhaust valve seats.
99996-D1161 COMPETITION CYLINDER HEAD (W/VALVES)

Recommended for racing purposes only. Specifications are the same as 11041-D1162 except that competition valves are fitted.
F.I.A. CYLINDER HEAD ASSY (LATE STYLE)
This later style F.I.A. cylinder head incorporates several improvemnts over the earlier style head (11041-22010). Among them are an improved port design for better flow and the ability to utilize many stock L-series cylinder head component pieces. The 50mm Mikuni/Solex induction system listed is designed to be sued only with the 11041-N7120 cylinder head assembly. Definitely not recommended for street-driven vehicles.
11041-N7120 CYLINDER HEAD ASSY
13201-A7660 44MM/1.73" INTAKE VALVE (4)
- Hollow stemmed and tuftrided.
13202-A7660 36MM/1.42" EXHAUST VALVE (4)
- Hollow stemmed and tuftrided.
13205-N3120 VALVE SPRING SEAT/OUTER T=0.8mm (8)
13206-N3120 VALVE SPRING SEAT/INNER T=2.0mm (8)
13207-A7660 SPECIAL VALVE SEAL (8)
13210-N7120 COLLET (16)

Early FIA head

slightly oblong exhaust ports
Cast iron cam towers with bushing inserts
larger exhaust ports than Late Style
Larger Intake and smaller exhaust than late style
2cc smaller chambers than late style

USA

510

ASSY-HEAD,CYLINDER
11041-23000        -1971.05
11041-N2200 1971.06-1972.06 <> 11041-N2201 <> 11041-N2202
11041-N2800 197207-         <> 11041-N2801

38mm INTAKE VALVE
13201-21000 VALVE-INTAKE CRANK & L13 <> 13201-A3500 38mm
13201-23002 VALVE-INTAKE EXHAUST & EVAPO <> 13201-A3000 38mm

33mm EXHAUST VALVE
13202-21002 VALVE-EXHAUST EXHAUST CRANK & L13 33mm
13202-23001 VALVE-EXHAUST EXHAUST & EVAPO 33mm

#14035-21000 MANIFOLD GASKET <> 14035-K0700 <> 14035-U0101
#11044-N2216 HEAD GASKET

CAMSHAFT
13001-21000    L13 -0371
13001-23000    L16 -0771
13001-23000-SV L16 0871-
13001-H2700    L16 0871- <> 13001-H2710 <> 13001-H2700-SV

610

Datsun 610 came with L18 for 1973 model year and L20B from 1974.

CYLINDER HEAD
L18  11041-U2001,11041-U2002,11041-U2003
L20B 11041-H6002

For service (replacement), these heads are authorized: 
L18 : 11041-U2004
L20B: 11041-U6001,11041-U6700,11041-U6701,11041-U6702.

620

11041-U6700 -0876 also 11041-U6701,11041-U6702
11041-W5880 0877-

710

Datsun 710 came with L18 for 1973-194 model years and L20B from 1975.

CYLINDER HEAD
L18  11041-U2003

L20B 0974-1076 11041-U6700, 11041-U6701,11041-U6702
     USA 1176- 11041-W5880 <> 11041-N5800
     CAN 1176- 11041-U6702

S10

A10

USA A10 (1978-1981 Datsun 510)

CYLINDER HEAD
11041-W5880 L20B

CAMSHAFT
13001-22000-SV

VALVES
13201-N7000 VALVE-INTAKE
* superseded 13201-A1100 
13202-N0401 VALVE-EXHAUST
* superseded 13202-N0400

S10

S10 North America (1977-1979 Datsun 200SX)

L20B

CYLINDER HEAD
11041-W5880 USA,CAN 0877-
* superseded 11041-N5800 USA -0777
11041-U6702 CAN -0777

CAMSHAFT
13001-22000 [L20B/SSS]

VALVES
13201-A1100 VALVE-INTAKE [42mm]
13202-N0400 VALVE-EXHAUST [35mm]

Valves

INTAKE
13201-A3500
13201-A1100 42mm stock L16/L18 SSS valve
13201-E4620 42mm factory modified for improved flow
99996-M1030 42mm competition polished and tuliped
13201-N4200 44mm stock L28 valve
99996-N1100 44mm competition polished and tuliped
* 99996-N1120 44mm steel seat, required for 4-cylinder head

EXHAUST
13202-21002 
13202-23001 33mm stock L16 valve
13202-M1040 33mm competition polished & tuliped
13202-N0401 35mm stock L16T/L18T/L20B valve
99996-D1034 35mm competition polished & tuliped

Thermostat Housing

L20B thermostat housing changed three times due to incorrect readings on the temperature gauge.

The improved version is a 3-bolt outlet & gasket, from May 1978.

USA 720	L20B	
11061-Y7000 HOUSING-THERMOSTAT
11062-Y7000 GASKET-WATER OUTLET
11060-Y7010 OUTLET-WATER

The 3-bolt housing is the best one. The dealers used to put it on L20Bs that were marginally overheating and it fixed the problem. Of course you have to change both the housing and the outlet both.

The last time Nissan revised the L20B thermostat housing they increased the outlet to a larger diameter, and used larger hoses. This was to (yet again) prevent overheating issues. It seems to have worked.

USA

11062-Y7000 GASKET-WATER OUTLET <> 11062-D4200
WASHER-JOINT,OUTLET
720	L20B
910	L24E/LD2
B11	CD17
S12	CA18DET
S130	L28E
T11	CA20S
S10	L20B 0578-
620	L20B 0578-

11062-D4200 GASKET-WATER OUTLET
910	L24E
B11	CD17
KN13	CA16DE/CA18DE
511	CA20S

11060-Y7010 OUTLET-WATER
720	L20B
910	LD28
S10	L20B 0578-
620	L20B 0578-

11061-Y7000 HOUSING-THERMOSTAT
720	L20B
S10	L20B 0578-
620	L20B 0578-

Clutch

L Engine transmissions use a hydraulic clutch. For LHD 1200s, just connect the existing hose to the new transmission.

Changing the clutch over to hydraulic from the Datsun 1200 cable system. You can use a Clutch Master Cylinder from Stanza A10. Put a hole through the firewall with a hole saw and bolt it up. Its very close to the brake master cylinder. Straighten the clutch pedal at the top so that it pivots correctly.

Also see for more ideas: Hydraulic clutch

180mm: L14
200mm: L16/L18/L20B cars
225mm: L18/L20B trucks
240mm: L24/L26/L28

5-bolt: L13/L14/L16/L18
6-bolt: L20B/L24/L26/L28

1974 620 with L18: 5 bolt crank and 225mm

Flywheels

When purchasing the engine, get the matching flywheel with it. Some L-series engines use a crank with five bolts for the flywheel, but most have six bolts.

Best to get the matching clutch assy and be sure to get tne matching release bearing sleeve.

L14
5-bolt flywheel with 180 mm clutch surface

L16, L18 cars
5-bolt flywheel with 200mm clutch surface

L18 - 1974 Datsun 620 Pickup
5-bolt flywheel with 225mm clutch surface

L20B
6-bolt flywheel with 225mm clutch surface (trucks)
6-bolt flywheel with 200mm clutch surface (S10)

280Z (L28) Flywheel
Album 11251

Distributors

Points, Hitachi remote EI from 1976-1978, and Matchbox from 1979-up. Z-series and L-series distributors interchange but only the 4-plug type should be used.

Advance Curves

1974 620 with L18
initial timing 12°@800rpm (12@650 in "D")
D4A2-01 550rpm/0° to 2150rpm/10°, 5.91inHg/0° to 0.94inHg/3.5°
Total advance: 10° initial + 2x12° centrifugal = 34°

1976 S30 with L28E
plug gap .8mm (0.031 in.)
FED D6F4-01 7° @ 800rpm HOT, 13° COLD
FED D6F4-02 7° @ 700rpm HOT, 15° COLD with AUTOMATIC
CAL D6F4-03 10° @ 800rpm
CAL D6F4-03 10° @ 700rpm with AUTOMATIC
CAL 2+2 D6F4-02 10° @ 700rpm
2+2 D6F4-01 7° @ 700rpm HOT, 13° @ 800rpm COLD
2+2 D6F4-02 7° @ 700rpm HOT, 13° COLD with AUTOMATIC

1977 S10 with L20B
all the same Centrifugal curve except CAN AT
all Vacuum curves vary
Full advance: ° initial + ° centrifugal = °

Hitachi Remote EI, high-energy 
plug gap 1.1mm (0.043 in.)
CAL MT D4F5-06 600rpm/0° to 1950rpm/11°, 2.76inHg/0° to 7.68inHg/10°
CAL AT D4F5-07 600rpm/0° to 1950rpm/11°, 3.54inHg/0° to 5.51inHg/13°

Hitachi points 
plug gap 0.9mm (0.035 in.) 
FED MT D4A5-14 600rpm/0° to 1950rpm/11°, 2.76inHg/0° to 7.68inHg/10°
FED AT D4A6-03 600rpm/0° to 1950rpm/11°, 3.54inHg/0° to 6.30inHg/4°
CAN MT D4A6-06 600rpm/0° to 1950rpm/11°, 5.91inHg/0° to 9.84inHg/5°
CAN AT D4A6-07 550rpm/0° to 2300rpm/11°, 5.91inHg/0° to 9.84inHg/3°

Retrieved from "http://datsun1200.com/modules/mediawiki/index.php?title=L-series_Engine_Components"

L-series Engine Components

Contents

Overview

Intake Manifold

Single Carb

Twin Carb

Weber

EGI

Exhaust Manifold

14035 Manifold Gasket

14035-U0115

14035-U2800

14035-W5300

14035-W5800

Head Gasket

11044-U0800

11044-N2216

Aftermarket Head Gasket

Camshaft

Cylinder Head

Open Chamber vs. Closed Chamber

Compression Ratio

Head Cast Numbers

OS Giken

Australia

Japan

510

610

710

720

910

A10

B110

B210

Nissan Competition

USA

510

610

620

710

S10

A10

S10

Valves

Thermostat Housing

Clutch

Flywheels

Distributors

Advance Curves