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Top End Oil Leak

Started by JohnnyTheCraneGuy, October 16, 2025, 03:24:59 PM

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JohnnyTheCraneGuy

Was I supposed to heat the washer first before installing? I didn't see any mention of this in the Haynes manual but I have seen somewhere that heating the washer and making it softer will help with sealing. Could I also use Red RTV Silicone on the washer?
Current
2003 XVS650
1990 FJ1200 Fiona
1986 FJ1200 (Parts Bike)
1984 FJ1100 (1200 Swapped) Asuka
1984 FJ1100

Pat Conlon

Quote from: JohnnyTheCraneGuy on November 04, 2025, 02:44:55 PMWas I supposed to heat the washer first before installing? I didn't see any mention of this in the Haynes manual but I have seen somewhere that heating the washer and making it softer will help with sealing. Could I also use Red RTV Silicone on the washer?

Pass on the RTV

Take the copper washer out, heat it up to soften it and try reinstalling. 
I've done that trick on re using copper crush washers on brake line steel banjo fittings
LA Mike told me about that trick years ago...I think he called it re-anealing.

Now I always use fresh aluminum crush washers with my Spiegler aluminum banjos.

Let us know how it works.
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

JohnnyTheCraneGuy

will definitely report back  :hi:
 
Current
2003 XVS650
1990 FJ1200 Fiona
1986 FJ1200 (Parts Bike)
1984 FJ1100 (1200 Swapped) Asuka
1984 FJ1100

JohnnyTheCraneGuy

Well I finally traced down the culprit of the leak! It's coming from the damn intake side of the valve cover gasket where the semi circle is  :dash2:

Its sucks because the PO had just finished doing the valve adjustments this summer so its still fairly new, oh well!  :hi:
Current
2003 XVS650
1990 FJ1200 Fiona
1986 FJ1200 (Parts Bike)
1984 FJ1100 (1200 Swapped) Asuka
1984 FJ1100

Pat Conlon

If it was a new gasket, you should be able to reuse it.

Some RTV on those half moons should do the trick.

Don't use RTV on the entire gasket, Randy yelled at me for doing just that....but I will say, that fucker didn't leak.

Alas, poor Randy had to use a crowbar to get the valve cover off.

Good for you in tracking down the leak. Kudos.

1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

JohnnyTheCraneGuy

Gotcha, Pat!

Will definitely try not give in to the temptation of that although it is strong  :rofl2:

Current
2003 XVS650
1990 FJ1200 Fiona
1986 FJ1200 (Parts Bike)
1984 FJ1100 (1200 Swapped) Asuka
1984 FJ1100