Question: How much should a valve job cost, and why?
Answer: It's difficult for any shop to quote an exact
price for a valve job because there are so many variables involved.
The ultimate price you pay will depend on the engine application,
the parts replaced, and any additional repairs or work that may
be necessary.
The least expensive valve job would be one on a domestic V8,
V6, straight six or four cylinder engine that required no crack
repairs or head straightening, no new valves, springs or other
hardware, and no special tools. The cost of the valve job might
be as low as for the machine shop portion of the work, plus
to for gaskets and antifreeze, plus to labor
to remove and install the head.
On the other hand, if you have an import car with dual overhead
cams, four-valves-per-cylinder and a lot of fancy valvetrain hardware,
you might be looking at a total bill of several thousand dollars.
Parts typically cost much more for import engines as well as
performance engines and diesels. The labor to do the valve work
is also much more involved on these overhead cam multi-valve heads.
(Of course, they didn't tell you that when you bought the car.
All they stressed was the fantastic performance of overhead cams
and multiple valves.)
DO IT YOURSELF?
You should know that most garages and dealers do not do their
own machine work on heads. They send all their heads out to a
machine shop that has the necessary valve and seat refinishing
equipment.
If you're an advanced do-it-yourselfer, you can pull your
own cylinder head and take it directly to the same machine shop
and save the labor costs for removing and installing the head.
But pulling a head on a late model engine is no task for a novice.
There's a lot of stuff that has to be removed and reinstalled
correctly. What's more, on some overhead cam engines installing
the timing belt can be tricky. So if you have any doubts, don't
tackle such a job without professional help.
