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[Datsun 1200 encyclopedia]

L/Z/KA/SR Crossmember

Revision as of 17:38, 23 July 2012; view current revision
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Categories: Engine Modifications | Engine Swaps

L, Z, KA and SR all use the same crossmember mount points. For swapping any of these engines into a 1200, you can use the stock B110 L-series crossmember or an A-series crossmember suitably modified. Or, use the unmodified A-series crossmember with custom engine-side brackets.

Contents

Oil Sump

Which crossmember you use determines which oil pan you should fit to the donor engine (or vice-versa). With Datsun 1200 crossmember which is front-sump design, it is best to use a front-sump pan with the donor engine. If you use the lowest-profile sump (e.g. Vanette winged sump) it will fit the 1200 crossmember without needing notching of the pan or the crossmember.

For more details on oil pans, see the individual engine swap articles:

L-series Engine Swap
Z-series Engine Swap
KA Engine Swap
SR engine swap

L and Z use the same oil pans, so swaps to the factory winged sump are easy.

Stock

Factory crossmember from L14-powered B110 works with a mid-sump pan. Because it is a very rare crossmember it is rarely seen in swaps.

This crossmember dips very low and comes slightly forward (stock 1200 crossmember is notched slightly to the rear).

  • 54401-H2500 MEMBER ASS'Y-cross, front suspension
  • 54401-H2501 MEMBER ASS'Y-cross, front suspension (from '71-7)
    23007.jpg
  • 81-34028-1 BOLT (4)
  • 89-12340-1 NUT (4)
  • 54408-21000 WASHER-plain
  • 54408-U0100 WASHER-plain (from '71-7)
  • 54407-21000 WASHER-plain
  • 11220-A3500 INSULATOR-engine mounting (2)
  • 11230-A3500 BRACKET ASS'Y-engine mounting front (R.H.)
  • 11233-A3500 BRACKET ASS'Y-engine mounting front (L.H.)
  • Uses Datsun 510 Transverse Links
    • 54529-A0800 LINK ASS'Y-transverse, front suspension (R.H.)
    • 54529-U0102 LINK ASS'Y-transverse, front suspension (R.H.)
    • 54530-A0800 LINK ASS'Y-transverse, front suspension (L.H.)
    • 54530-U0102 LINK ASS'Y-transverse, front suspension (L.H.)

7714.jpg

L-series Horns

Stock 1200 crossmember with the horns (uprights) removed and Stanza L-series horns fitted. The Stanza horns fit right on. Use a drill for spotwelds and a grinder to remove the horns.

10290_4a24cd569ca9e.jpg

10290_4a6416b6cb755.jpg

Notched/sectioned for additional pan clearance
10290_4a76a02e28eae.jpg 10290_4a76a0519af25.jpg

1151.jpg

Swapping Crossmembers

Only crossmember from 1200s bolt into 1200s: either the original-style 1200 one (1970-1973) or the late-tyle 1200 one (1974-2007).

NOTE: These do not fit a 1200:
* A10 (Stanza/510) crossmember
* B210 (Sunny/120Y) crossmember
* B310 (210/Sunny/120Y/140Y/150Y)
* 510/610/710 crossmember

Modified Crossmember

Cut the stock 1200 crossmember uprights, weld flat plates at an engle to it. Drill a hole in each plate and slot them for bolting in the engine mount isolators (rubbers).

Here is a 1200 crossmember, horns removed and low profile horns fabricated:
23232.jpg

10195_49d066ce65c0d.jpg

You can modify the 1200 crossmember: Have the mounts trimmed to an angle simular to that of a 200B, then cut the 200B mounts in 1/2 to finish the job and locate the motor lower and improve the mounting angles. A 910 Bluebird L20B sump fits almost perfect, reshape it with a hammer a little just so it will clear the 1200 crossmember, maybe 1/2cm.

If using other sumps, you may need to do the following:
* Remove notch from Datsun 1200 xmember
* Reshape sump to clear the Drag Link (cross rod)

Modified curve rearward for engine setback
1152.jpg

High-profile horns to raise engine and notched/sectioned for more clearance. This is done to fit common pans (if you can't find the right pan)
16922.jpg 16923.jpg 16924.jpg

Maddat Crossmember

Maddat sells an 1200 crossmember modified for SR.

10290_4d8336d28d5fb.jpg

Custom Mounts

Some guys cut the stock crossmember horns (uprights), and weld on horns from a donor vehicle. Then you can use donor rubber isolators. But you don't have to modify the 1200 -- you can create new engine-side mount brackets, and use stock B110/B210/B310 crossmember and isolators.

Example

KA custom mounts to use with stock A-series crossmember (late A-series)
th_IMG_0156.jpg th_IMG_0110-1.jpg

Z-series custom mounts to use with stock 1200 crossmember
photo-11.jpg
might work for L/SR/KA too

You can use the stock 1200 or A12/A14 type crossmember and fit low-profile rubber mounts to it. Then drill simple angle iron to bolt to the engine to match up to the rubber mounts.

23071.jpg 23072.jpg

Fit stock 1200 crossmember unmodified:
23070.jpg

B210, B310

Datsun B310 (210/Sunny) can use the crossmember from the Datsun A10 (Stanza/510). It is the same dimensions to bolt to the B310 chassis, but has horns (uprights) for L-series engine.

Details? Please share.

B210 can use a 510/610/710 crossmember. Some report fouling with the Tension Rods on some year/model B210, but a little grinding/cutting will solve that.

Motor Mount Insulators

The rubber Insulators (iosolators) you use depends on which crossmember you use. For an L-series type crossmember the following are usually fitted.

To put a KA/SR in a 510 you run 620 L-series insulators, which they are taller than 510 ones. Left and Right are slightly different, so some run two left side isolators, others use Left and Right as Datsun intended.

Although most swappers use 510/620 style insulators because they are lower profile, SR20 and KA24E/KA24DE use this style rubber isolator as stock. Buy at RockAuto.com:
8296.jpg

Comparison: L-series insulator (Datsun 510)
BA1040827-1.jpg

Stock PB110 or 510 type
* 11220-A3500 INSULATOR-engine mounting (2) $34 USD
* 11230-A3500 BRACKET ASS'Y-engine mounting front (R.H.) $48 USD
* 11233-A3500 BRACKET ASS'Y-engine mounting front (L.H.) $48 USD 

$14 at RockAuto.com

BA1040827-1.jpg
510 specs (L13 uses a softer LH insulator than L16):
* 11220-21004 INSULATOR LH L13
* 11220-22000 INSULATOR LH L13, RH ALL
* 11220-A3500 INSULATOR ENGINE MTG  FRONT (2)
** supercedes 11220-22000

A10 (1978-1981 510) uses double-stud type: $14 at RockAuto.com
2680.jpg


620 with L-series engine:

  • 11220-B7900 INSULATOR-ENGINE MOUNTING FRONT (2) 1073-0874
    • supercedes 11220-B2000 -0973
  • 11220-B8000 INSULATOR-ENGINE MOUNTING FRONT RH 0974-
  • 11221-B8000 INSULATOR-ENGINE MOUNTING FRONT LH 0974-

620 1973-1974 triple stud type, $5 at [RockAuto http://www.rockauto.com/catalog/x,carcode,1210105,parttype,5552]
2404.jpg

620 1975-1978 single-stud type $3 to $14 at RockAuto.com http://www.rockauto.com/catalog/x,carcode,1210127,parttype,5552
2533.jpg
These look the same as 510 insulators, but are likely a harder rubber.

Many favor puck-style insulators, because they are readily available in polyurethane (but OEM-style new rubber makes for less vibration). Either style insulator (stock or puck) can fit stock L-type or A-type mounts.

23070.jpg