[wlm]

I adjusted my valves the other day and now the exhaust valve cover is leaking...just a little. I am sure that I overtightened the bolts. Any ideas an what I should do now? Loosen the bolts? New valve cover? New gasket? I inspected the cover and as far as I can tell there aren't any cracks.

 

[AJ Nin]

Probably you didn't get the gasket under the cover back on straight. I would take off the cover and check the gasket. If it is not in good condition, you just need a new one.

 

[rkwfxd]

Probably you didn't get the gasket under the cover back on straight. I would take off the cover and check the gasket. If it is not in good condition, you just need a new one.

This pull it off wipe it off reinstall carefully.


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[Grom1202]

It's oring gasket...you might have pinched it when u removed the covers

 

[Grom pilot]

When you take the valve cover off, inspect the o ring,if it popped out when you were in the process of tighting the valve cover, you probably flat spotted the o ring. Sometimes you can get lucky and wipe a little bit of grease in the valley the o ring sits in as well as wipe the entire oring and reinstall. The grease will act as a seal as well and oil is thiner then the grease so it won't bleed through. You do need to torque the valve cover to the recomened spec ,when you over tighten that's when you end up flattening the O ring . When you have the right tension and the motor is going through normal heat cycles from riding, when the head heats up during a duty cycle the metal (valve covers and cylinder heads) expand ever so little the oring moves to ever so slightly to keep a seal, if its over tightened to the point where it flatens the oring the two surfaces are touching then when it gets hot there no place for expansion and valve cover will warp a little and start weeping. When the motor cools it goes back, but it will keep getting worse.

 

[wlm]

Ok, that makes sense. Do you know the recommended torque spec? I don't have the shop manual yet.

 

[Grom pilot]

I don't but someone posted a manual on here ,just search a little bit you'll find it. That info will be there. Probably around 11-12ft lbs.its not much. Good luck

 

[Grom pilot]

Look in the maintenance section...

 

[Remould]

Just thought I'd mention that the workshop manual says to replace the O rings on both the valve covers and inspection caps when inspecting/adjusting the valves.
I adjusted my valves at the weekend, but didn't bother changing them.
No leaks so far...

Sent from my HTC One

 

[toyotabb]