first off he is full of crap. unless you car was tuned to run 92 then its perfevtly fine to run 87-89 oc.
Check the stock headers. Sometimes the bolts break or back out which will create a ticking sound and poor idle and stumble.
P.S. Get another mechanic!
Check the stock headers. Sometimes the bolts break or back out which will create a ticking sound and poor idle and stumble.
P.S. Get another mechanic!
