Afraid of the answer..... - 986 Forum - The Community for Porsche Boxster & Cayman Owners

911monty · 09-02-2017, 01:52 PM

Good news! BUT get that oil out of there before you drive again!!! That oil has done a marvelous job but should be changed out ASAP since I'm sure it's suffered from Thermal Breakdown and if any engine deserves it I think this one qualifies. And yes leave the bleeder open and the cover off and see if you can identify where the coolant is leaking from. Congratulations on maintaining sanity/

robdelorenzo · 09-02-2017, 02:04 PM

Thanks Monty!
We know for sure that the coolant was coming from the overflow. The mechanic had it on the lift yesterday and showed me. I just looked again (OCD) and there are only a few drops on the garage floor.
One other question, there's nowhere to get a German oil filter (Hengst is what I like to use on this Sat of a 3 day weeked. I found this at Autozone: STP Oil Filter S8278 - Read Reviews on STP #S8278

I guess it's going to have to do as it's all I can find within a short distance to go pick it up. I think it will hold me over until I change the oil again which will be in way less than 5k just to play it safe.

911monty · 09-02-2017, 02:11 PM

Yes I have no doubt it's coming from the overflow. The coolant cap and the purge valve are in the overflow formed into the top of the expansion tank. With the cover off you should be able to open the trunk and see the coolant leaking. Just don't attempt to tighten when leaking!
Do you have a NAPA nearby? I think they carry the Hengst filter but I'd put a WIX/NAPA gold in if they have it.