Pulled the intake manifold off and what we found
Jul 27, 2008, 08:47 PM
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Pulled the intake manifold off and what we found
I have been working on a friends EVO the past week or so. I pulled off his intake manifold for a swap and we foung the intake ports and valves covered in gunk! Thick black oily stuff. I have never seen more than just carbon deposits. What is this and what would cause it? The engine/head were built not too long ago. It seems that oil is getting in there somehow. Failed head gasket maybe? It was inside the intake manifold too, just not nearly as bad. What do I tell this guy his problem is? Pics:
Jul 27, 2008, 09:32 PM
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), it only took about 30 minutes max from start to finish. The stock IM would be easier as its easier to reach underneath for the bolts. Its a pie job.Check the valve seals as well, thought that stuff looks kinda more like crank vent stuff as the ^guys^ said.
Jul 27, 2008, 09:58 PM
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ok, good to know as I plan on putting on my Buschur ported IM and BR 65mm
t-body next week along with a hondata style IM gasket....just gotta wait for my replacement cam bolt to come in first so i can finish my cam install.....
then after that back to Mark at TT for a retune.... will pump the boost up another 2psi and see if we can tune for more power across the board....
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Jul 28, 2008, 05:28 AM
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The motor only has around 500 miles on it. It was absolutely cleaned very well before assembly. There is no EGR. PCV is vented to the bottom of the car.
Jul 28, 2008, 05:30 AM
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I just took my sheetmetal off today(after blowing it apart), it only took about 30 minutes max from start to finish. The stock IM would be easier as its easier to reach underneath for the bolts. Its a pie job.
Check the valve seals as well, thought that stuff looks kinda more like crank vent stuff as the ^guys^ said.
), it only took about 30 minutes max from start to finish. The stock IM would be easier as its easier to reach underneath for the bolts. Its a pie job.Check the valve seals as well, thought that stuff looks kinda more like crank vent stuff as the ^guys^ said.
Jul 28, 2008, 07:40 AM
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Hmm... PCV is vented to atmo... that would leave the turbo the next component that could put oil into the intake. Have you checked for blow-by? High crank case pressure can force oil back up the turbo oil drain and cause it to leak out of the seal on the comrpessor side which would then be carried through the intake.
Just a guess.
Just a guess.
Jul 28, 2008, 08:59 AM
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Hmm... PCV is vented to atmo... that would leave the turbo the next component that could put oil into the intake. Have you checked for blow-by? High crank case pressure can force oil back up the turbo oil drain and cause it to leak out of the seal on the comrpessor side which would then be carried through the intake.
Just a guess.
Just a guess.
