Anybody with a 1200/120y parts book able to help me out with a part number for the diff head gasket for h145 diff head?? also i'm assuming that the b210 h150 gasket is the same?? have searched the wiki but couldn't find it, and local nissan dealership not to keen on searching their micro fiche. Cheers

Wiki:

H145 and Differential Part Numbers
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$1.70 USD

H150
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$4.43 USD

Your Nissan dealer is still using microfiche? Nissan has it on the computer now for over 10 years.

Or just use gasket sealer.

Yes, you could re-use the old gasket with some gasket sealer. Or instead of a gasket, use RTV silicone sealer. Just be careful not to use too much and to follow the directions (e.g. let it partially set up before assembly). Although for precise alignment and gasket is recommended.

cool, thanks for that. Nissan in New Zealand apparently only has the old part numbers on micro fiche, they're usually ok if a part number is available though.

If not available, go to a "Mill Supply" Store and buy some brown paper gasket material, about 1/32" thick.

Lay cover on paper, draw outline and bolt circles.
An "arch" punch is handy for cutting bolt holes in gasket material, you can make one from a pipe nipple or SS tubing the correct size. Cut the bolt holes just a tiny bit too big.

Glue to Diff Cover with 3M Weatherstrip adhesive, place on flat surface for 24 hrs, use minimal amount of Gold RTV sealer on carrier side.

Duh, clean first with solvent like Acetone etc.

Rusty Wrench

be careful using silicone sealants. I remember from a lubrication course that silicone sealant is not suitable for use with EP additives which your diff oil will have in it.

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Nzdatman is correct, my bad for attempting to get my few neurons to fire so late.

Permatex No.1 is a hardening sealer according to GM service manual, good for Oil, Water/Coolant and Fuel sealing.

They suggest, water pump gaskets, thermostats, warped intake manifolds etc

It is a very good sealer and is brittle and will not cause a "Stuck" situation upon removal..

Permatex No. 2 is a "non-hardening" sealer, personally, the ONLY use for it I've found is to have it "hold" the gasket in place till the bolts grab.

For most applications, I find no need for a sealer when using good paper or cork on a "Machined" flat and clean surface, only grease.

YMMV on a rear end cover, honestly it's been so long, like over 10 yrs since I serviced my Locker in my 88 Chevy full size, I forget..

Your best idea on this situation is to IGNORE most of what I said, and listen to someone who's done one in this DECADE

Sorry, my Neurons are firing like an old Ford on a cold morning :)

Rusty Wrench

Last 10 years?
Use a modern RTV silicone sealer.

Permatex have "Gear Oil RTV Sealant"
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They also have Ultra Black RTV Silicone which is designed for "differential covers".

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Good info to know, most of my stuff doesn't require diff oil changes except about every 200k miles or so,, I get little work in that area.

It is GOOD to know there's specialty "Gear-Oil-Resistant" RTV

Now if we can just get the bulk of the "techs" to realize there IS a Oxygen Sensor Safe Rtv out there.

Rusty Wrench