Valve cover gaskets-912ULS

Re: Valve cover gaskets-912ULS

by Roger Lee » 10 years ago

Roger Lee

131 5.38k 5.44k

Hi Terry,

It's in the Heavy maint. Manual. 12nm or 105 in/lbs. if you have to 115in/lbs can be tried without any problems. I have found some valve covers that just refuse to quit oozing. Doesn't really drip, but oozes and drives me crazy. So here are a few things to try;
First re-torque them when cold, install new "O" rings, apply a little smear of Loctite 598 on the "O" rings and or remove the cover and place a sheet of 360 sandpaper on a very flat surface and do a figure 8 pattern with the valve cover to remove any high spots or uneven spots. Don't get overly carried away with the sandpaper and sand it down too far. Just smooth the outer surface.

---

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Re: Valve cover gaskets-912ULS

by itemprop='name' » 10 years ago

0 0 0

Thx. Roger, appreciate the assistance and advice for correcting the problem.

Re: Valve cover gaskets-912ULS

by Przemysław Wiśniewski » 10 years ago

Przemysław Wiśniewski

65 247 3

Terry, check if it's not a leak from the pipes under the head (pushroads covers). It's common problem with leak from place where pipe is going into head.

Re: Valve cover gaskets-912ULS

by Kevin Stewart » 10 years ago

Kevin Stewart

5 184 0

Terry,

Make sure that there is a small gap between the covers of adjacent cylinder when they are torqued up. The torque for the M6 allen bolt is only 10Nm, over-torquing may make your problem worse if it distorts the cover.

Kevin

Re: Valve cover gaskets-912ULS

by Conrad Beale » 10 years ago

Conrad Beale

3 66 22

Roger,
I have had a look and cannot find the torque of 12Nm for the covers on the 912/914, its probably me not looking well enough, where is it documented? The IPC & HMM both specify 10Nm.

On the fuel injection engine the covers are 12Nm, but that doesn't mean the carb engine is the same... the heads are different.

If it is 12Nm does it apply to older rocker covers? and does it apply to the original heads with the different rocker shaft support?