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Post by hardhatharry on Sept 22, 2012 19:24:41 GMT 1
Hi y'all
I am finishing an engine build and fitting the paper gasket on the clutch /gearbox side on a 31K engine.
I have previously fitted a pattern one but it leaked, I cleaned up the faces and greased the gasket but I dont know if it leaked due to poor preparation, dodgy cases or incorrect fit.
I now have a proper Yam one (£16 ouch!) and I dont want this too leak so I'm after advice to ensure I'm not forking out again.
I have cleaned up the face again using methalated spirits as per the manual and when I run my finger round the faces I cant feel any raised bits.
Do I just put the gasket on and tighten the screws?
Grease the gasket, fit and screw?
Put a thin smear of generic seal (clear type looks a bit like silicone) on either face prior to fitting gasket, fit and screw?
Cheers for any advice!!
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Post by Shytalk on Sept 22, 2012 19:34:36 GMT 1
In theory dry will be fine, you can put a smear of grease on it if you want to re-use it next time, don't put silicone sealant on it - as it will be destroyed if / when you take the cover off next time.
If it still leaks then its time for the sealant.
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Post by 47x on Sept 22, 2012 20:28:37 GMT 1
use the gasket dry,DONT use sealant!!!
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higgsy
Thrash Merchant
Posts: 458
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Post by higgsy on Sept 25, 2012 4:44:32 GMT 1
I always lightly grease mine, pattern or genuine, never had a leak yet. It's very easy to get the gasket misaligned when putting it on, greasing it holds it in position and means you can use it again
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Post by bigal1 on Sept 25, 2012 8:19:32 GMT 1
i allways grease new gaskets and have done for over 20 years and never had a problem
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Post by theodoric on Sept 25, 2012 12:38:24 GMT 1
For me it's a drop of grese to hold it insitu but other than that dry fit everytime.
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Post by bigal1 on Sept 25, 2012 13:13:06 GMT 1
the only problem using silicone it can go inside your engine a gob things up grease just melts into the oil ... a old Porsche mechanic told me about using grease IV used it ever since if you clean the 2 faces were the gasket goes it should never leak
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Post by Bozzy on Sept 25, 2012 13:56:03 GMT 1
I used silicon on both faces and it has not leaked.
My understanding is the the silicon breaks down in oil always used silicon on every gasket and never had a leak or problems.
But obviously when removing cases etc it does rip the seal after time.
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Post by steve h on Sept 25, 2012 15:37:30 GMT 1
Grease, same as bigal1.
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Post by rdstars on Sept 25, 2012 19:33:41 GMT 1
I've never had a gasket leak, even a patten head gasket. Take time cleaning the surface, if it looks dirty then clean some more. I always use some good quality Silicone, nothing like a spot on seal so why take chances.
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Post by billy on Sept 25, 2012 21:42:38 GMT 1
I always use a bit of grease on the gasket and I've never had any problems with it.  I imagine it'll give a slightly better seal (?), but the grease is mainly not for sealing purposes, but rather so that it'll pop off easier next time so I don't have to replace them all the time. |
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Post by billy on Sept 25, 2012 21:45:43 GMT 1
Btw, when it comes to head gaskets though, I DO NOT use any grease. I don't know if you COULD do it with good results, but me, I don't do it. I believe modern head gaskets (the ones in metal) should have a dry mating surface. Each to their own though, some use sealant etc and don't have any problems so...  |
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