need help- suffering reversion!!!
#1
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Join Date: Sep 2005
Location: psl, fla
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i just put together a stock 454, mercruiser, used a 350 hp cam, 049 heads, stock intake, qjet, thunderbolt 5, etc, w/ stainless marine exhaust, with the motor running i can see it pulling water back into the engine, if i take the riser off the inside of the manifold is wet, both sides- all parts pressure test good, if i use a piece of 3" hose and extend the dry side of the riser i see no water coming out( doesn't have a chance to mix w/ water), so i know it is not an internal leak in the engine or exhaust, compression and leakdown are good, i don't have any tight rocker arms-why is it doing this??? could it have something to do w/ the egr passage??? i mean, it roughly joins the 2 banks together, should i close off this passage??
Last edited by mcrsr; 05-27-2007 at 08:37 AM.
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You have something going on. We sell that set for the 365 Magnum and the EFI motors. If your risers are very old, they might be the old style where the inner pipe doesn't extend beyond the outer pipe. If you would take a digital picture and forward it to '[email protected]', I'll try to help you.