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Oil In Spark Plug Valley/chamber

jonathon

By jonathon,
in General Maintenance

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jonathon Enthusiast

jonathon

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Posted

Hi all, I have had some idling issues in a m35 stagea (vq25det) so I looked at my spark plugs.

I have found oil in the chamber where the coil pack lead runs - and all over the spark plug.

The spark plug was dripping with oil but from what I can see it is from the oil in the chamber as there does not seem to be oil in the piston area.

Any ideas on what's wrong?

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https://www.sau.com.au/forums/topic/425649-oil-in-spark-plug-valleychamber/
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scotty nm35 Grand Master

scotty nm35

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Posted

It is quite common to have a slow leak into the plug well, it doesn't affect the engine at all as oil is an insulator. To properly fix the leak you will have to replace the whole rocker cover (around $250) as the seals aren't replaceable, or you can attempt shoving silicone around the plug tube/seal. The rocker gasket will require replacement also while you are there.

This would also explain the oil burning smell when you turn the heater on.

Did you pull a plug? The last set I changed for someone had a 3mm gap. lol.

jonathon Enthusiast

jonathon

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Awesome - thanks for the info. I fortunately don't get any burnt oil smell!

Yeah I pulled a couple of plugs - gap was good - also was nice to see good quality platinum plugs in there as its a bi!&ch to get too!

scotty nm35 Grand Master

scotty nm35

Posted
Posted

When you launch there is only one way for the oil to go, down on to the turbo. (unless you have a DD?)

I find it fairly easy to get to the plugs, you only need to drop the intake/bov pipe...

Get into the Stagea section above ^^ there is plenty of reading for you to do. :)

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