Silicon on top of injector O-rings?
10-12-2005, 08:56 AM
#1
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Silicon on top of injector O-rings?
Has anyone ever put some high temp silicon sealer around the top of the fuel injector O-rings when changing them?
Jack
Jack
10-12-2005, 10:18 AM
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Yah, I did that too. I'm just not sure if everything is sealed up real good after changing the plastic injector sleeves and the O-rings on the injectors themselves.
I'm in the middle of an engine rebuild and haven't put the CIS system back on yet.
Jack
I'm in the middle of an engine rebuild and haven't put the CIS system back on yet.
Jack
10-12-2005, 01:20 PM
#4
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No sealant is needed on gaskets, seals & o-rings after the cylinder heads and cam towers are joined. White lithium grease is a good product to aid with assembly for o-rings, such as injectors and injector sleeves. Most contemporary gaskets (chain box, intake, exhaust) are made to be put on dry. O-rings (oil return tube, injector/sleeve, Carrera tensioner, camshaft) can benefit from a thin coat of grease. Oil seals (crank at flywheel, etc.) will benefit from a little grease around their perimeter, to help with installation, and a thin layer on their sealing lip, to protect them on initial start-up.
Pete
Pete
10-12-2005, 01:26 PM
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Do NOT put silicone sealer on o-rings. It can make them leak. O-rings are supposed to move with expasion and contraction of metal parts. A sealer will not allow this. Dow corning makes a silicone O-ring paste called 111 which is perfect for this. You can also use a silicone grease. Also, don't soak them in gasoline as Volkswagen suggests.Use the DC-111 or silicone grease, but NOT silicone sealer. good luck
