I put a new set of plastic cover gaskets and new coil pack boots all around on my ls. I was wondering if the motor oil in there is a common thing or if I had something wrong. I talked to a mechanic friend of mine and he has worked on a few LS's he said that it was that way on all of them. Is it just something on these cars because of the jag engine???
oil in the plug holes
- Thread starter bfrantz96
- Start date
NYC LS8
Dedicated LVC Member
You changed the seals that go around the plug wells when you did valve cover gaskets? If so, sounds like they aren't seated correctly?
Quik LS
Dedicated LVC Member
right - you need to change the valve cover (not head) gaskets.
http://www.lincolnvscadillac.com/tech/Lincoln-LS/Valve_Cover_Seal_Inspection/Valve-Cover-Seal.htm
Pressure builds in the valve covers and oil seeps past the gaskets seals and into the plug wells.
http://www.lincolnvscadillac.com/tech/Lincoln-LS/Valve_Cover_Seal_Inspection/Valve-Cover-Seal.htm
Pressure builds in the valve covers and oil seeps past the gaskets seals and into the plug wells.
Snowseeker
Well-Known LVC Member
If there is pressure building in the valve train that means your PCV and or ecav system is bad.
Quik LS
Dedicated LVC Member
the V8 do not use a PCV valve - they vent open hose to the intake.
It's a very, very common issue with Gen1 LSes (a thread on it almost everyday) and some early 03s.
It's a very, very common issue with Gen1 LSes (a thread on it almost everyday) and some early 03s.
Snowseeker
Well-Known LVC Member
Than there would have to be something wrong with the hose if there is pressure building under the valve covers. No mater what engine it is there should never be pressure in the crank case.
cammerfe
Dedicated LVC Member
Crank Case Pressure
Actually, crank case pressure of some sort is part of all internal combustion engine activity. Because of pollution controls mandated by the EPA, there's a built-in arrangement that's supposed to draw the internal 'fumes' back into the intake. On the early cars it sometimes doesn't work very well. The sure cure is to put a vent into each cam cover. (Only if you don't have to pass state inspections !)
KenS from Ben's Place
Actually, crank case pressure of some sort is part of all internal combustion engine activity. Because of pollution controls mandated by the EPA, there's a built-in arrangement that's supposed to draw the internal 'fumes' back into the intake. On the early cars it sometimes doesn't work very well. The sure cure is to put a vent into each cam cover. (Only if you don't have to pass state inspections !)
KenS from Ben's Place