BLOWN496 posted this tip
"Thought I would share a hair pulling story. My engine guy told me I was chasing my tail because I would have a water leak if my intake wasn't sealing. I have had the intake off three times trying to figure out, why I have oil in the intake ports,and the gaskets were soaked and pulling oil from the bottom side. It did not smoke but had a rough idle and oil on the plugs. I also had oil droplets on my bumpers after a run down the freeway. I thought the gaskets were slipping below the huge rectangular ports. I verified it is square with the heads and used sealer on the bolts. The problem was the end clearance on my intake (block walls to intake manifold ends resting on them) is only .045. The cosmetic head gaskets were making a small dent because they were protruding not more that .010 deep into the end gap seal area, on all four corners of the intake manifold to block wall seal ares . I filed a notch in the edge of the intake manifold edge to clear the tips of the head gaskets that were the source of the obstruction and it is now running like it should. Smooth idle and sounds better too. I've been doing this stuff for 50 years and this is a first. "
trimming off any excess head gasket tip that protrudes into the seal area with a sharp chisel, and dimpling both the block forward and rear rails and the matching intake surfaces before applying a 1/4" thick bead of sealant to both surfaces help maintain a good oil seal on the intake to block end gaskets on the intake
youll occasionally find uses for a high temp rated silicone sealant
like ultra-copper that has about twice the temp tolerance of the common black RTV
RELATED THREAD
http://garage.grumpysperformance.co...stalling-the-intake-manifold-distributor.464/
viewtopic.php?f=55&t=4891&p=13459#p13459
viewtopic.php?f=52&t=2005&p=5328&hilit=positive+crankcase#p5328
http://www.youtube.com/watch?v=YdIGZ-tV ... re=related
viewtopic.php?f=87&t=4636&p=12610&hilit=catch+breather#p12610
"Thought I would share a hair pulling story. My engine guy told me I was chasing my tail because I would have a water leak if my intake wasn't sealing. I have had the intake off three times trying to figure out, why I have oil in the intake ports,and the gaskets were soaked and pulling oil from the bottom side. It did not smoke but had a rough idle and oil on the plugs. I also had oil droplets on my bumpers after a run down the freeway. I thought the gaskets were slipping below the huge rectangular ports. I verified it is square with the heads and used sealer on the bolts. The problem was the end clearance on my intake (block walls to intake manifold ends resting on them) is only .045. The cosmetic head gaskets were making a small dent because they were protruding not more that .010 deep into the end gap seal area, on all four corners of the intake manifold to block wall seal ares . I filed a notch in the edge of the intake manifold edge to clear the tips of the head gaskets that were the source of the obstruction and it is now running like it should. Smooth idle and sounds better too. I've been doing this stuff for 50 years and this is a first. "
trimming off any excess head gasket tip that protrudes into the seal area with a sharp chisel, and dimpling both the block forward and rear rails and the matching intake surfaces before applying a 1/4" thick bead of sealant to both surfaces help maintain a good oil seal on the intake to block end gaskets on the intake
youll occasionally find uses for a high temp rated silicone sealant
like ultra-copper that has about twice the temp tolerance of the common black RTV
RELATED THREAD
http://garage.grumpysperformance.co...stalling-the-intake-manifold-distributor.464/
viewtopic.php?f=55&t=4891&p=13459#p13459
viewtopic.php?f=52&t=2005&p=5328&hilit=positive+crankcase#p5328
http://www.youtube.com/watch?v=YdIGZ-tV ... re=related
viewtopic.php?f=87&t=4636&p=12610&hilit=catch+breather#p12610
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