Timing belt trouble

10

Asked by May 29, 2015 at 01:32 PM about the 2004 Volkswagen Passat GL

Question type: Maintenance & Repair

my timing belt snapped. I found a mechanic
who works from home, I trust that He is
good but he is running into huge problems.
He had the timing belt replaced when he
started it it sounded bad so he took it off to
realign it and now it will not fire. he has
tried everything. he swears he had it
perfectly at TDC but still can't get it to fire. I
am a student and cannot afford to take it to
a shop. Do you have any advice for him?
Please help I'm desperate by the way I
bought the kit that included water pump

4 Answers

70,295

Run a compression test. If this is an interference engine, it's done. The compression test will tell the tale. If he gets very low or zero compression readings on all cylinders either the timing marks are off or the valves are damaged (interference engine). If the valves are damaged, in my opinion, it's not worth fixing. HTH. -Jim

1 of 1 people found this helpful.
10

Thanks for sharing. So he note has the head apart checking for damaged valves. It is an interference motor. So are you saying replacing the valves won't fix it?

1 of 1 people found this helpful.
70,295

Probably not. The valve guides are probably damaged and if it's a push rod engine the push rods are most likely bent as well. The pistons may also be damaged from slamming into the valves. HTH. -Jim

1,475

Rebuilding the head should have this car up and running finevagain, if the car is in otherwise good shape I would think it's worthwhile to repair.

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