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post #1 of 4 (permalink) Old 05-22-2019, 01:27 AM Thread Starter
 
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Valve cover gasket trick? Rtv?

Working on our newly acquired 12 Smart the valve cover was previously I stalked with grey RTV and leaking badly, I order a gasket and it came today. I figured it would have a lip & bolt holes. But it’s just a thin silicone bead material. And the grove on the valve cover is very shallow. What’s the trick to get it to stay in place as I install it? I have worked on several cars mostly Euro cars, and this is a first running into this type of gasket without a placement grove or through bolt holes. What’s everyone doing? Thanks
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post #2 of 4 (permalink) Old 05-23-2019, 06:33 PM
 
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Try using a thin coating of Hylomar Universal Blue. It will give you a bit of a tacky surface to stick the gasket in place. It doesn't set like an RTV does.

I use it all the time as a coating on the paper gaskets common on motorcycles. Because it doesn't set, I can remove and reuse the gaskets.

It used to be available through NAPA and Permatex, not sure if they are still licensed to produce/sell it. Otherwise Amazon looks to have it.

Hylomar Universal Blue Sealant - PL32

~toaster
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post #3 of 4 (permalink) Old 05-24-2019, 06:56 AM
 
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I just put some RTV in the groove, then the gasket and wait 20-30 minutes until it's semi-cured before installing.



And might as well replace the spark plug tube seals if they weren't before.
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post #4 of 4 (permalink) Old 05-24-2019, 07:09 AM Thread Starter
 
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Thanks for the input. I’m going to try the gasket dressing today. And yes I got new plugs, and have been dong as many preventive things as possible. Removed & cleaned and re-lubed the shift actuator and gear selector motor. And have been going over any paint or corrosion while I have it apart.
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