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#1
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560SL Oil puddle in lower intake plenum
I have recently pulled the engine and transmission from my
'87 560SL due to a leaking rear oil seal and seeing oil fouling uniformly on all the stock spark plugs. On disassembly of the intake manifolds I found that the lower plenum was very crusty with oil soaked carbon and there was even a puddle of oil! I have removed both cylinder heads and disassembled the engine down to a shortblock assembly at this point. All the cylinder bores look good and have good compression. The valve stem seals appear to be hardened and leaking somewhat. I am asking where is the oil in the lower plenum coming from? When I removed the tube that runs from the valve assembly on the left front of the exhaust manifold around the left cylinder head then through a two bolt flange in the front of the lower intake plenum, I found that the end of the tube that went inside the lower plenum was almost sealed up with carbonized oil... What is the cause of this oil in the intake plenum? |
#2
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Don't think I can help you (sorry), but what kind of oil was this motor run on-synthetic or conventional oil?
Best of luck with your repair
__________________
"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss Michael 2014 E63S Estate 2006 SLK55 1995 E500 1986 Porsche 944 turbo |
#3
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I have used Mobil 1 since 1994....
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