The first half of the job involves taking a lot of stuff apart and removing the old belt. First of all, if the belt is not broken, the valves likely were saved by the Engine Computer shutting the engine off before that damage could occur. If the belt IS broken, the second half of the job is reassembly, and that starts with installing the new belt. At that point, before any more reassembly is done, your mechanic can perform a cylinder leakage test on one or all of the cylinders. The tester simply shows the percentage of leakage when compressed air is forced into the spark plug hole, but by listening at four places, we can tell WHY that leakage is occurring. For bent valves, you'll hear a hiss at the tail pipe if the exhaust valve is bent, and a hiss at the throttle body if an intake valve is bent.
Knowing those test results can give the mechanic the confidence to continue with the reassembly or to know he is recommending valve service that is really needed.
If you are willing to invest more time than dollars in valve repair, you might consider looking for a nearby community college with an Automotive program, and let students do the work. If you have an interest in knowing more about how that works, let me know, and Ill describe how we did that in my program.
Monday, April 24th, 2017 AT 7:56 PM