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964 small oil leak

My 1991 964 Carrera 4 Cabriolet, developed with the years, oil leaks, I read Oleg Perelet note in this forum, and correct all of them, but one, four years ago.
My car still have a small oil drop coming from the drain plug on the thermostat.
Last oil change, I installed a new plug and washer, but the leak still there.
Any suggestion? Using two washers will made a better seal?
Appreciate your comments, and ideas.
Thanks.
Francisco.
Old 01-31-2019, 01:27 AM
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Is it possible that there is something that is preventing the ring to seal?Might want to try some sand paper to the hole to clean the surface, and don't over tighten.
Old 01-31-2019, 01:38 AM
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Thanks for your advice, I will try for sure.
Have a nice day.
Old 01-31-2019, 01:45 AM
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Quote:
Originally Posted by Turboman View Post
Using two washers will made a better seal?
Appreciate your comments, and ideas.
Thanks.
Francisco.
2 washers will make a leak .
Ask me how I know ..


Clean the area completely then clean again with goof-off or brake cleaner then dry with a lint-free cloth .
If itís not perfectly clean , repeat ...

The oil is a 911ís blood , and you are going to do surgery .... .
You donít have to on a mask and scrubs etc , but youíre basically you donít wanna get any crap in there

Check all the washers are out , and give the plug and mating surfaces a good clean .

Some say wipe the washer with new top-up oil before installing , and although the factory torque value is for dry parts Iíve done both with no ill effects .

Iíll look up the torque value for you later if you donít allready have it .
Old 01-31-2019, 04:02 PM
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Ian C2, thanks, will follow your recommendation steep by step. Let you know the results. Thanks.
Francisco
Old 01-31-2019, 11:07 PM
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