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What do guys use to seal ends of Holden V8 intake manifolds?
Gasket kit supplied with cork front and rear gaskets but have seen differing opinions.
Some use the cork gaskets with a smear of gasket goo. Others do away with the cork and put a 2-3mm bead of a product called "ultra blue"..
Jim
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Turf the rubber or cork bits and use a big bead of Silicone gasket like Ultra Blue. Far easier, less likely to leak and less frustrating. |
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Cheers mate..
I can't see how the cork gaskets would give a perfect seal.
Looks like ultra blue is the go and a lot less hassle. |
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How big is the gap if you go without the gasket, I wouldnt rely on a 4mm thick bead of silicone to stay in place very long.
I usually glue the cork gasket down then add RTV to the other side.
The blue 'sensor safe' stuff isnt quite as good at the standard RTV silicone, its designed to not damage engine oxygen sensors but that dosent make it better.
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GM Part number 3835215, gasket and stud sealer, just like the maker intended. Both sides of the cork gasket and let it dry to tacky before you fit it.
It stinks, it's expensive, it doesn't clog oil pick up screens and oil galleries like silicone and it works.
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There's definitely two schools of thought and both swear by their way.
I've noticed on youtube a lot of experienced engine builders prefer the high temp silicone method.. and only one who swears by the cork/rubber gasket method with silicone either side as you described...
Only drawback to the silicone is you can't start the car for 24 hour while the silicone sets.. |
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