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View Full Version : Rear main seal: Gasket vs. Silicone RTV , suggestions.

Indolent
08-07-2007, 12:37 PM
Not exactly for a 240sx but for my dads toyota, but what's it matter
I gotta replace the rear main seal, just wondering about any pro's con's between
using an actual paper / whatever gasket
vs
RTV silicone gasket maker
or
even using both

just looking for suggestions or the why not this and that, which lasts longer/seals better, etc.
nlzmo400r
08-07-2007, 12:45 PM
rear main seal shouldnt be RTV or gasket at all, it should be a metal wound coil that is circular surrounded by a thick rubber gasket.
ManoNegra
08-07-2007, 12:51 PM
^that's right. dab oil on it to make better seal ala oil filter. Seen mechanic put on a slight coat of RTV on one before too.
Indolent
08-07-2007, 01:21 PM
^that's right. dab oil on it to make better seal ala oil filter. Seen mechanic put on a slight coat of RTV on one before too.

^ Oo wasn't aware it was like that.
ManoNegra
08-07-2007, 04:40 PM
http://caddyinfo.onedgesolutions.com/howto/casehalf12.jpg

That's what they usually look like.
95Blue240sx
08-07-2007, 05:41 PM
You should of know just by the name. Rear Main SEAL. If it was a gasket, it would of said gasket.
berz
08-07-2007, 05:54 PM
is there a front seal? im leakin from the valve cover and a main seal , just bought the car but owned 240s for a long time. just need 2 kno if theres more then 1 main seal.:Owned: http://www.zilvia.net/f/images/smilies/owned.gif
brokeAs240sx
08-07-2007, 06:01 PM
is there a front seal? im leakin from the valve cover and a main seal , just bought the car but owned 240s for a long time. just need 2 kno if theres more then 1 main seal.:Owned: http://www.zilvia.net/f/images/smilies/owned.gif

Yes

Front Main Seal (this is for an SR, but they have the KA ones also):
OEM Nissan Front main seal - SR20DET (http://www.frsport.com/Genuine_OEM_Nissan_Front_Main_Seal_SR20DET_p_7719. html)
95Blue240sx
08-08-2007, 01:02 AM
SIGH! You said its leaking from the valve cover, REPLACE IT. Theres a Front main and Rear main. You can learn a lot just by looking into the FSM.
aznpoopy
08-08-2007, 10:02 AM
+1. or use common sense

clean of all the gunk
drive it around
note where its leaking from

theres a seal on the valve cover
silicone rtv seal on top and bottom front timing cover
front main seal
oil pan
oil pressure sender (by oil filter) can spurt out oil as well.

pinpoint problem and replace/repair accordingly