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Message started by Robertomoe on 04/11/08 at 12:03:25

Title: valve cover leak
Post by Robertomoe on 04/11/08 at 12:03:25

So my exhaust valve cover is leaking a little oil on the bottom right side (when viewing from the front of the bike). I tried taking it off, wiping both surfaces completely down, and flipping the cover. :-? I torqued the bolts down pretty hard, but Im still getting some leaking.

The gasket looks fine. Anything I can do to fix this?

Title: Re: valve cover leak
Post by Max_Morley on 04/11/08 at 12:56:21

Flipping the cover? It only has one sealing side, rotate maybe? Gasket? It should have a formed o-ring seal, not reusable forever. Make sure the mating flange is dead flat or it will never seal correctly. Could be PO tightened it with something between the flange and head cover and warped it. Max

Title: Re: valve cover leak
Post by Oldfeller on 04/12/08 at 08:40:47

Remove cover.

Remove "O" ring from cover.

Flat-sand mating face of cover on 180 grit sandpaper until entire surface shows consistent hit marks from the sandpaper.

Check head machined surface for any wrench dings (they happen). Usd a fine flat bastard file to fix any issues you find. (bastard style file cuts flat and fine, it has no cross cut marks to it)

Put it all back together with a new "O" ring.

Torque to factory recommended spec only.

OR .....

flatten the cover and head as above, reuse old "O" ring and see if you get lucky.

Title: Re: valve cover leak
Post by officer studer on 04/20/08 at 22:50:32

im having the same problem is there any one that can help us with this

Title: Re: valve cover leak
Post by T Mack 1 on 04/21/08 at 10:31:21

Several things can lead to a leak. A warped cover, a cracked cover, an o-ring that has become stiff with age, scratched on the surfaces, either on the head or the cover.

Try this: Take cover off. Clean surfaces and clean o-ring. Surfaces with alcohol (91% is better that the 70% rubbing alcohol). O-ring with dish detergent. let dry. Next, take some high temp silicon seal (it has to be high temp stuff!!!!) and put a thin coating on surfaces. Thin as in thinner than a credit card but thicker that a piece of paper. Put together and let dry over night.

The silicon will help fill the voids any imperfection might make. Yet, silicon comes off fairly easy so you will be able to adj the valves at a later date.

Title: Re: valve cover leak
Post by officer studer on 04/24/08 at 18:04:17

well i fixed my problem the easy way. I found out i had two much oil in the engine it had a little over 3 quarts im guessing when i bought it. I drained put in 2 quarts and about 4 ounces of the engine stop leak stuff from walmart and now it hasnt leaked a drop since so im happy

Title: Re: valve cover leak
Post by vtail on 04/24/08 at 18:21:03

556865627573686A6862070 wrote:

You're sure it's the valve cover? Because the dreaded Rubber Plug that covers the right front cylinder stud nut is right next to it.
This has been a source of leaks. You can see this plug with a flashlight. ;)

Title: Re: valve cover leak
Post by T Mack 1 on 04/24/08 at 18:52:47

666F6F606A6C7B7A7D7C6D6C7B090 wrote:

How's the clutch liking the stop leak stuff????