[beepbeep]

First of all....please understand the difference between "head stud" and "exhaust stud".

"head stud" bolts head to the case...if one breaks you can hear exhaust gases escaping. Mucho $...but not so serious as it sounds.


"exhaust stud" is 8mm stud used to bolt heat-exchanger flanges to the head. They brake all the time. When they do, you'll hear gases escaping trough gasket. Nothing serious...just have them pull down heat-exchangers, extract/drill the stud and helicoil/timecert stud holes.

If you are a real buff, pull out all studs, timecert all holes and put in new studs with new gaskets. Works great for me...


In your case , It's probably exhaust studs....

How to check? Raise the car and strat the engine. U half meter of rubber hose with one end in your ear and move other one around until you find leak-source.


Cheers!