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post #346 of 572 (permalink) Old 11-13-2017, 10:54 AM Thread Starter
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I realize that I'm going to open a can of worms here, but I have to ask:

I'm almost ready to start mounting major components onto the block. What is the conventional wisdom regarding using sealant with gaskets?

...none, one side only, both sides, only particular gaskets? In some applications, gaskets are expected to have a bit of 'give' to accommodate the uneven expansion and contraction of components due to heating action. As we have already seen from the cigarette seal discussions, sometimes the original factory answer isn't the best long-term answer.

Judging by the gaskets I've been removing, they were all adhered on both sides with muck made from the scrapings off Satan's hooves.
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post #347 of 572 (permalink) Old 11-13-2017, 11:15 AM
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I do not use gaskets on either the timing cover or the lower pan - just Ultra Grey. I put UG on both sides of the upper pan gasket. I also put it on all of the screw heads and nuts in those places. I glue the cam cover gasket to the cover and use a thin smear of UG on the other face. I put a thin smear of gasoline resistant sealant on the intake manifold gasket. Also, be aware of the need for UG on the head gasket around the drain holes at the rear.

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post #348 of 572 (permalink) Old 11-13-2017, 11:18 AM
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Quote:
Originally Posted by Shakey View Post

Judging by the gaskets I've been removing, they were all adhered on both sides with muck made from the scrapings off Satan's hooves.

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post #349 of 572 (permalink) Old 11-13-2017, 07:42 PM Thread Starter
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I glue the cam cover gasket to the cover and use a thin smear of UG on the other face. I put a thin smear of gasoline resistant sealant on the intake manifold gasket.
When you say 'glue', are you using something like Gaskacinch? What particular sealant do you use on the intake manifold gasket?

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post #350 of 572 (permalink) Old 11-13-2017, 07:50 PM
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Ahh yes. That would be the chocolate colored permatex glue that comes in a bottle with a brush. Use to use it to seal VW case together with back in the day. You can still get it. Alfa glued the valve cover gasket to the cover on the new cars. I cleaned more of those off then I care to remember.
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post #351 of 572 (permalink) Old 11-13-2017, 08:01 PM
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Quote:
What particular sealant do you use on the intake manifold gasket?
Permatex Permashield fuel resistant gasket dressing & sealant

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post #352 of 572 (permalink) Old 11-13-2017, 08:06 PM
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If you really clean the gasket surfaces, I've never used gasket anything on both sides. I use it on ONE side of the cam cover (cam cover side) so you don't have to juggle too many bits. You can do the same on the oil pan gaskets.

For some things - like the transmissions halves - there is no gasket. In this case carefully clean the surfaces - don't scrape as any damage will become a leak. I use acetone or lacquer thinner and a plastic scrub pad (you can get some very fine ones at a paint store) to clean the surfaces, and carefully lap them flat on a large surface plate with 320 grit wet sandpaper. Then put a thin coat of ultra grey, -- and carefully imbed a silk thread along the surface, going the right way around the bolt holes. This is an old A&P trick used for aircraft motors; Gordon has mentioned it here on the BB.

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post #353 of 572 (permalink) Old 11-14-2017, 05:24 AM
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Brake cleaner and a scotch brite pad works just fine and you probably have it. Don't get carried away with the gasket sealant barrage, it's not complicated.
You don't need any sealant on the intake manifold gasket especially the green Reinz.
One side on the cam cover, ultra grey is fine
on things where there is no gasket like the gearbox halves you cannot beat
Permatex 51813 Anaerobic Gasket Maker, 50 ml Tube. It also works on things like the front cover gaskets where you can easily apply a very thin coating to both sides by massaging it into the gasket between your thumb and fore finger.
Stop and think about your comments on what you've gone through scraping gaskets and do you really want to go through that again? Also less is more in this case, it doesn't need to squish out the sides into unsightly globs. I like the idea of the thread, never heard that before, thanks Robert.

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post #354 of 572 (permalink) Old 11-15-2017, 06:20 AM
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post #355 of 572 (permalink) Old 11-15-2017, 06:50 PM Thread Starter
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That engine looks like a piece of art!
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post #356 of 572 (permalink) Old 11-15-2017, 07:18 PM
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Don't worry about removing Ultra Grey, it rubs off with little effort.

Ed Prytherch
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post #357 of 572 (permalink) Old 11-15-2017, 07:38 PM
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I do not use gaskets on either the timing cover or the lower pan - just Ultra Grey...
I typically do that too but I just was warned by Mike Besic that without the gasket thickness the timing gear digs into the inside of the front cover. He sent me pictures...

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post #358 of 572 (permalink) Old 11-16-2017, 05:19 AM
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Quote:
I typically do that too but I just was warned by Mike Besic that without the gasket thickness the timing gear digs into the inside of the front cover. He sent me pictures...
I am going to rebuild my motor soon and I will look out for that. Thanks.

Ed Prytherch
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post #359 of 572 (permalink) Old 11-16-2017, 06:49 AM
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Gasket

I`ve never has a problem leaving out the paper gasket.

If you are concerned before completing the build insert the intermediate shaft and reach in and turn the shaft with your hand.

Richard Jemison
RJR Racing

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post #360 of 572 (permalink) Old 11-16-2017, 08:11 AM
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There's a thrust bearing shoulder on the bushing for the timing sprocket which should keep the rotating parts away from the front cover no matter what gasket is used or not.
But eliminating the gasket will reduce the distance of the front cover to the block and possibly reduce the axial clearance of the timing sprocket shaft to an unacceptable figure.
Checking the endplay of the sprocket shaft before final assembly is good advice.

Last edited by Chas H; 11-16-2017 at 08:14 AM.
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