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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHRMS ? Coolant ?
Leading reported evidence
Clean (on metal flakes)
Suggestion or failed attempt
No successful repair reported for this finding.
0
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0
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1
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Read evidence and context
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Suggestion · Original poster
No metal on mag drain plug and I pulled apart the old filter element and it looked clean (on metal flakes).
Leading evidence: 'Clean (on metal flakes)' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean (on metal flakes)' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
The oil cooler leaks (on my car) were very slow, likely only happening when the cooling system was under full pressure, causing a slow loss of coolant, which replacing the o-rings has stopped completely.
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Suggestion · Original poster
Did oil change today (1 year 4500 miles on oil - 62K on car) - 8.5qt Mobil 1 0W40, Hengst Filter.
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Suggestion
The oil cooler leaks (on my car) were very slow, likely only happening when the cooling system was under full pressure, causing a slow loss of coolant, which replacing the o-rings has stopped completely.
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Generation: 20261026T130754Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Did oil change today (1 year 4500 miles on oil - 62K on car) - 8.5qt Mobil 1 0W40, Hengst Filter. WHile I was under the car I noticed a oily area just behind the oil filter. Mostly dried on / dirt - but there was one small moist drop (I didn;t notice any oil drops on garage floor yet. Is this RMS area ? Do I need to take care of this right away or it is OK to wait until it gets worse (and/or I do the clutch anyway).
(Wiped dirt/oil from area indicated by red arrow - picture is taken from oil filter area looking towards driver side of car). There is quite a lot of oily residue around back of transmission area - not sure how long it has been there - perhaps since PO - RMS was done in 2006.
No metal on mag drain plug and I pulled apart the old filter element and it looked clean (on metal flakes). Will send sample to Blackstone for report.
Also noticed coolant level was slightly below minimum mark on the expansion tank. I added 1 pint of Pentosin SF (50/50 distilled water) and the level was still only on the min mark (cold). Is that normal ? Coolant level has been close to min mark since I got the car and I never worried to add before - seems like a pint is a lot to add for only moving less than 1/2 inch or so up the expansion tank ? I don;t see any obvious sign of leaks or water staining - but could be due to water pump soon. That is probably my next DIY.
That appears to be where the RMS and/or IMSB leaks show up. Oil "leak" not enough to worry about.
Keep an eye on the coolant. The Min mark is for cold, Max hot. If you fill to max cold it will vent out when it gets hot and expands. Then you will have a coolant "LEAK" to worry about.
Could be that your AOS bellows is failing. It can cause a really oily mess all over... At 62k and the age of your car, it could be suspect..
Cheers,
TomF
If you would clean everything first, it can help you pinpoint any leaks. Thats quite the mess under your car and may make it very hard to locate the source. It should look like this:
Yeah - maybe failing AOS explains high oil consumption ? That is also a job to do when I need clutch - unless things get worse before then. KrazyK - how did you clean under there - steam ? or spray on engine degreaser ? Thanks
Keep in mind that coolant loss can also be caused by a cracked AOS. That was happening on my car. One of the coolant attachments had cracked and was leaking a bit.
Best,
TomF
It wasnt bad because I dont have any leaks. I hand spray degreaser or brake cleaner (with mask of course) then scrub with different size brushes.
It will be much easier to see any leaks when you are done. Thankfully mine remains this clean (so far).
Could also be the O-rings on the oil cooler, as it is coolant cooled. It is located right over the top of where the oil filter is and was the source of a similar mess on my car. Pics in this thread:
https://rennlist.com/forums/996-foru...orth-it-2.html
Which started and ended as a motor mount thread, but got side tracked in the middle. My AOS, which I also replaced at the time, was also blowing a little oily mess through the o-ring, which looked as if when it was installed, the o-ring was damaged. But that is on the other side of the engine, not near the oil filter.
The oil cooler leaks (on my car) were very slow, likely only happening when the cooling system was under full pressure, causing a slow loss of coolant, which replacing the o-rings has stopped completely. There appeared to be no oil leaks from the o-rings, but it was only a matter of time, IMHO.
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