Can leaking main seal cause [A, B and C]?

[NismoTyler]

Originally Posted by daryl337

The crank and rear main seals should not be causing those issues, unless you are oil soaking your harness, or your oil pressure is dropping to seriously low levels. Assuming your oil pressure is fine, and your wiring is clean of oil, then the seals should not have any effect on your idle, or hesitation.


Question for you though, which may or may not be of a related issue.... how is your crankcase breather operating? A faulty ventilation system can cause excessive crankcase pressures, which can do all sorts of cool things including excessive oil consumption. That could cause idle concerns possibly, particularly B and C in your categories. Might want to check spark plugs for signs of oil burning. Of course, you may have a completely unrelated issue, as well as simply a worn main seal.

I usually look towards the PCV system when I start popping seals/gaskets (although I would have expected the valve cover gasket to start leaking before a main seal) and have idle issues at the same time. Its worth looking into if you think they are related.

Great info on the pcv system stuff. I'm not sure how the breather is doing but I'll check that too.

I'm concerned about what you first said though...the harness being soaked in oil. I need to look closer at it. Tonight on my way home my heads up display faded on/off/on/off/on/off/on/off then finally stayed off. Not cool. Electrical issue.