Intake manifold oil leak symptoms..
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Intake manifold oil leak symptoms..
How bad can the intake manifold leak oil? I have a nice puddle under the car that forms after everytime i stop when driving the car. I eliminated a few things (oil pressure switch, oil filter, oil pan/rear main). I cannot think of anything else. I have oil everywhere under the car and also on the body (tranny tunnel area). Are these typical from leaking intake manifolds?
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How bad can the intake manifold leak oil? I have a nice puddle under the car that forms after everytime i stop when driving the car. I eliminated a few things (oil pressure switch, oil filter, oil pan/rear main). I cannot think of anything else. I have oil everywhere under the car and also on the body (tranny tunnel area). Are these typical from leaking intake manifolds?
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The EGR tube does not "break down" sealant. The reason why LT1 manifolds leak is either not enough sealant on the intake, dirty/sloppy install or the expansion/contraction of the entire intake (not just the area where the EGR tube is) causing intake bolts to loosen as well as sealant to fatigue over time or all of the above.
Hopefully you will not encourage the OP to wrap the EGR tube...
Oil can get anywhere it wants. You must understand while the car is in motion the undercarriage is an extremely hostile environment.
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My old LT1 was very leaky, when the motor was pulled.. pretty much all the way around the intake manifold was oil, and it looked to be like it was coming from the back of the manifold and dripping down from there to the ground.
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I replaced the intake manifold and put on VERY generous bead of Copper RTV on both sides of the block, and alas... IT STLL LEAKS lol. The intake manifold doesn't leak for sure (front is dry and i felt the back on the seam and it's dry). The oil leak seems to have gotten smaller (smaller puddles) so I assume the intake mani was just one of many leaks. Where else could the damn thing be leaking that much from? Under hard acceleration, my friend noticed that the car smokes (from oil hitting the exahust). HALP!
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backs of the heads!
I had a 97 Z28 and someone had tried to mill the gasket surface on the side of my heads that meets the block. They ended up leaving huge grooves in it and the gaskets never set.......I had a shop do a dye test because I had already fixed my rear main, intake manifold, timing cover, valve covers, WP drive, oil pan, and oil sending unit...still leaked after all that... They put a dye in my oil and ran it for a bit then put the car on a lift...
They used a blacklight and shined it under my car and the dye glows flourescent in the blacklight. Any fresh oil was glowing and it led them to the back of my heads...both of them...and it was a BAD leak...I thought they only dealt with coolant in the heads, but apparently the oil can leak from the back...
I had a 97 Z28 and someone had tried to mill the gasket surface on the side of my heads that meets the block. They ended up leaving huge grooves in it and the gaskets never set.......I had a shop do a dye test because I had already fixed my rear main, intake manifold, timing cover, valve covers, WP drive, oil pan, and oil sending unit...still leaked after all that... They put a dye in my oil and ran it for a bit then put the car on a lift...
They used a blacklight and shined it under my car and the dye glows flourescent in the blacklight. Any fresh oil was glowing and it led them to the back of my heads...both of them...and it was a BAD leak...I thought they only dealt with coolant in the heads, but apparently the oil can leak from the back...
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backs of the heads!
I had a 97 Z28 and someone had tried to mill the gasket surface on the side of my heads that meets the block. They ended up leaving huge grooves in it and the gaskets never set.......I had a shop do a dye test because I had already fixed my rear main, intake manifold, timing cover, valve covers, WP drive, oil pan, and oil sending unit...still leaked after all that... They put a dye in my oil and ran it for a bit then put the car on a lift...
They used a blacklight and shined it under my car and the dye glows flourescent in the blacklight. Any fresh oil was glowing and it led them to the back of my heads...both of them...and it was a BAD leak...I thought they only dealt with coolant in the heads, but apparently the oil can leak from the back...
I had a 97 Z28 and someone had tried to mill the gasket surface on the side of my heads that meets the block. They ended up leaving huge grooves in it and the gaskets never set.......I had a shop do a dye test because I had already fixed my rear main, intake manifold, timing cover, valve covers, WP drive, oil pan, and oil sending unit...still leaked after all that... They put a dye in my oil and ran it for a bit then put the car on a lift...
They used a blacklight and shined it under my car and the dye glows flourescent in the blacklight. Any fresh oil was glowing and it led them to the back of my heads...both of them...and it was a BAD leak...I thought they only dealt with coolant in the heads, but apparently the oil can leak from the back...
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NP. I just remembered going through that situation before and it took me forever to get it down but that ended up being the problem.
Are you positive they seated right when they were put on? Did the leak start before or after the install? did you have the seating surface milled before you put them on, or did you just take em out the box and install them??
Not trying to insult you, just trying to cover all possibilities
Are you positive they seated right when they were put on? Did the leak start before or after the install? did you have the seating surface milled before you put them on, or did you just take em out the box and install them??
Not trying to insult you, just trying to cover all possibilities