Head gasket

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Category: Engine Mechanical

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The Datsun 1200 cylinder head gasket fit A12 and A10 engines. Aftermarket gaskets vary in material and size of cooling holes. Aftermarket gaskets may come with oversized bore holes.

Contents 1 Overview 2 Blown Gasket 3 Revisions 4 Part Numbers 4.1 Big Port 4.2 Head Set 4.3 Nissan Competition 4.4 Head Set 4.5 GX Metal 4.6 Nissan Competition 4.7 Spacer Gasket

Overview

Album 22208 Album 22067

Also See:
* Changing Head Gasket
* Tune-up

Nissan recommends re-torquing the head gasket bolts ever twenty-four months (every two years):

slight weeping leak
Album 10755

Blown Gasket

When a head gasket is blown out (partly missing) between cylinders it is obvious, and the engine will run on "two cylinders" (barely run, if at all).
Album 15053

But head gaskets more often fail in a less obvious manner -- they lift up enough to allow compression to leak past, causing low compression. An Engine compression test will find this.

A more rare failure is of the oil or water passage. The engine will still run perfectly, but oil will leak or coolant will be lost. A Cooling System Pressure Test can often pinpoint the diagnosis.

Coolant leaking into the oil pan, causing "milkshake" to be visible on the oil cap and dipstick
Album 8710

Album 18407 Album 21050 Album 21051 Album 21052 Album 21053 Album 21054 Album 21055 Album 21204

Revisions

H39 is the current revision. It uses no extra o-ring seal.

H1025 was a revision back in 1971-1972 that reduced risk of oil leaks when using H1000. Revised H1025 gasket used an O-ring seal:
Album 24735 Album 24388

Part Numbers

11044-H3925 GASKET-CYLINDER HEAD B110 A12 USA 0671- $57 USD > 11044-H3900
11044-H3901 GASKET-CYLINDER HEAD B210+B310 A12 JAP 
11044-H1025 B110 (from '72-5) > 11044-H1000 > 11044-18004
* 11045-H1000 RING "O" (from '72-5)
11044-H1025 B210 from '75-5
11044-H1026
11044-H1027
11044-18004 GASKET-CYLINDER HEAD B10 A10 > 11044-18002 <> 11044-18001 <> 11044-18000
Album 22068

Interchange:
A10 PULSAR 1000 BN10 988cc 1978-ON
A10 SUNNY 1000 B10,B20 1000 1966-1970
A12 SUNNY 1200 B110,B210,C20　　1171cc 1970-73.3  
A12 SUNNY 1200 B210 1973.4-75  
A10 CHERRY 1000 E10, F10 988 1970.10-73.9  
A12 CHERRY 1200 PE10, F10 1171cc 1972-78  
A10 SUNNY CAB C20

11044-18004 GASKET-CYLINDER HEAD A12 superceeded 
Album 22068

11044-H1000 GASKET-CYLINDER HEAD A12 
11044-H1000 GASKET-cylinder head B110, B210 to '75-4
11044-H1025 B210 from '75-5
11044-H1026
11044-H1027
11044-H3900 GASKET-CYLINDER HEAD A12 0671- 

fits:
A10 PULSAR 1000  BN10  988cc  1978-ON  
A10 SUNNY 1000 B10,B20 1000 1966-1970
A12 SUNNY 1200 B110,B210,C20　　1171cc 1970-73.3  
A12 SUNNY 1200 B210 1973.4-75  
A10 CHERRY 1000 E10, F10 988 1970.10-73.9  
A12 CHERRY 1200 PE10, F10 1171cc 1972-78  

11044-H2300 A12GX, A12T
11044-H2301 [thinner?] A12GX, A12T
11044-H2325 A12GX from '72-6
Album 22066

Big Port

11044-H2325 A12 GX from '72-6 > 11044-H2300 
* 11045-H2300 RING "O" (from '72-6)
11044-H2301 A12T B210 [thinner?]
Album 22066

Head Set

Nissan
11044-H3926 KIT-GASKET,CYLINDER HEAD
11042-H3927 KIT-GASKET,CYLINDER HEAD

aftermarket
Victor HS3602
FEL-Pro HS21181PT 
ROL HS32060

Head Set gasket kit includes all you need to change the head:

* Cylinder head gasket
* Valve stem seals
* Rocker cover gasket
* Gasket-manifold to cylinder head

it may include the following:

* thermostat gasket
* intake-to-exhaust manifold gasket (heat riser gasket) 
* oil cap packing (gasket)
* fuel pump gaskets

Nissan Competition

Nismo head gaskets for Nissan A series motor A12,A13,A14,A15 Engine

11044-M0822 t=0.8 79.0 mm bore diameter 
11044-M0823 t=0.6 80.0 mm bore 
Album 22065

シリンダーヘッドガスケット

既に生産廃止

Head Set

11044-H3926 KIT-GASKET,CYLINDER HEAD
11042-H3927 KIT-GASKET,CYLINDER HEAD

Head Set gasket includes all you need to change the head:

Cylinder head gasket
Valve stem seals
Rocker cover gasket
Gasket-manifold to cylinder head

it may include the following:

thermostat gasket
intake-to-exhaust manifold gasket (heat riser gasket) 
oil cap packing (gasket)
fuel pump gaskets

Gasket Head Set
* Victor HS3602
* FEL-Pro HS21181PT 
* ROL HS32060

GX Metal

Nissan Competition

Nissan Competition

11044-M0821 COMPETITION HEAD GASKET
Gasket has a bore diameter of 79mm/3.11", an uncrushed thickness of 0.8mm/0.032" and displaces 3.9cc's.

Nismo head gaskets for Nissan A series motor A12,A13,A14,A15 Engine

11044-M0822 t=0.8 79.0 mm bore diameter 
11044-M0823 t=0.6 80.0 mm bore 
  

Spacer Gasket

custom order

シリンダーヘッドガスケット

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