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Old 03-15-2011, 10:51 AM
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Default 2002 Jetta 1.8T timing belt broke

So my neighbor has the above mentioned car and it came home on a hook. I pulled the carnage apart yesterday to find that all the teeth that were on the crank area of the timing belt have sheared off. So I first started looking for anything that may have frozen, like a tensioner or water pump - everything spun freely.
He cranked on the car trying to restart it after it "died" so naturally I am wondering how tight it is in there? I read that this IS an interference engine and it's likely there are some bent valves.

I pulled off the valve cover to see if there is any trace of an indication and the cams both spin freely. The tappets look like they are all working smoothly. Any chance I am not wasting my time? I know there is a *slight* chance it broke the right way but my 11 years as a Ford tech tells me otherwise.

So I have my compression gauge out and we are going to line up the timing marks and put the new belt on and turn it by hand a few times before testing. The problem is... I only see 1 timing mark for the exhaust cam gear. It's notched to the valve cover. The crank on the other hand, I see a dimple on the crank gear, but no where else. The timing cover on the bottom has no indicator. What am I looking for? TDC shows the "dimple" to be at about 5 o'clock. Thanks guys.
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Old 03-15-2011, 11:11 AM
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There is supposed to be a small mark on the cover above the crank shaft but it is not very clear.
If you have a manual transmission there is a rubber plug on top of the tranny and you can check the TDC on the flywheel. If you have auto then - oh well.
You can always remove the plug for cyl # 1 (next to the timing belt) and gauge TDC.
Likely you have got a number of bent valves I'm afraid.
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Old 03-15-2011, 11:19 AM
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Quote:
Originally Posted by AgGTI View Post
There is supposed to be a small mark on the cover above the crank shaft but it is not very clear.
If you have a manual transmission there is a rubber plug on top of the tranny and you can check the TDC on the flywheel. If you have auto then - oh well.
You can always remove the plug for cyl # 1 (next to the timing belt) and gauge TDC.
Likely you have got a number of bent valves I'm afraid.
I agree with the valves, but considering im in Texas and we are throwing our teachers to the wolves I am helping him out - Free of charge. If the valves are bent then I will go ahead with some new valves and put it together pending the guides are okay.

EDIT: Found the inspection window. Thanks.

Last edited by Mr.Fox5.0; 03-15-2011 at 11:23 AM.
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Old 03-15-2011, 11:35 AM
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Check out this DIY - you'll find the timing marks on pages 6 for the cam and flywheel and page 13 for the crank .
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Old 03-15-2011, 07:13 PM
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Just curious...how many miles on the car when the belt broke?
Auto or manual transmission?
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