|
The head bolts could be out of torque spec ,a quick check with a torque wrench when the valve covers are off would tell. Never know maybe the head bolts were never re-torqued after the last head job.
It might be that easy..
I am pretty sure the books tell you to re torque headbolts after 100 miles or so.
Or I have read that..
__________________
Save gas
Ride a Mtn bike for errands exercise entertainment and outright fun
__________________
|