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Oil Leak, Possible RMS/IMS? Pics Attached!

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Found suspicious oil leak when I was changing the rear wheels today. Seeking help from more experienced members here to diagnose the problem! Please see attached pics.

Car is a MY2000 Boxster S manual, with approx 60k miles. Serviced regularly at 5000km interval.

Oil is not dripping, none found on the garage floor. Car runs very healthy as far as I can tell!

Apperciate any help.









Edited by panameras
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  • Moderators

I would recommend to clean the engine properly in first place and check for leaks after a while, in that way it is much easier to detect a leak, saves time and is more efficient.

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I would recommend to clean the engine properly in first place and check for leaks after a while, in that way it is much easier to detect a leak, saves time and is more efficient.

Thanks, would definitely get on with cleaning it first. So no obvious signs of what it might be at first glance?

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I agree with spark plug tube o-ring diagnosis. Had same issue on my 2001 986S at 35K miles, but leaks had not progressed as far as yours. It was simple and inexpensive to replace both o-rings. I decided to replace the tubes while I was in there for a few bucks more. Tubes are plastic and degrade with exposure to temperature over time. Didn't want to risk future cracks by re-using old tubes.

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I had similar leaks underneath the car and re-torqued oil sump pan bolts and leaked stopped. 7.5 ft./lbs. Don't overtighten as they will snap off. Clean everything up and re-check for leaks. If that doesn't work you may need a new gasket and sealant.

Edited by kbrandsma
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  • 4 weeks later...

It's a good idea to buy a set of o rings and a couple of tubes and every time you change your plugs you can replace those that are leaking. Fairly inexpensive, I change my plugs every 30K and have changed 1 tube and 3 sets of o rings over the last 3 spark plug changes. MY98 is currently at 180K.


Also a good idea to have a boat plug on hand for popping out the tube. I bought mine from a local boat/marine store for less than $5. It literally pops out like your finger from a coke bottle.


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