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Timing belt chewed up/ covered in oil
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Topic: Timing belt chewed up/ covered in oil (Read 6182 times)
September 21, 2012, 11:23:09 am
srgtlord
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Timing belt chewed up/ covered in oil
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on:
September 21, 2012, 11:23:09 am »
It has been a few thousand miles since I replaced my timing belt. I go to inspect the belt last night and to my horror its covered in oil and part of it is chewed up. Now lets backtrack, I replaced the cam seal, the intermediate shaft seal and upgraded the valve cover gasket to the single peice rubber with studs. Needless to say the valve cover still leaked. My question is what happened? Any ideas? For starters I tensioned the belt too tight.
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Reply #1
September 21, 2012, 02:12:32 pm
burn_your_money
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Re: Timing belt chewed up/ covered in oil
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Reply #1 on:
September 21, 2012, 02:12:32 pm »
Did you put a dot of silicon in the corners of the VC gasket on the timing belt end?
I'd check the IM shaft bearings and seal first.
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Tyler
Reply #2
September 21, 2012, 02:30:25 pm
srgtlord
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Re: Timing belt chewed up/ covered in oil
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September 21, 2012, 02:30:25 pm »
I put a little bit more than a dot. I had the proper tension on the belt the first time, but I spent soo much time trying to time my darn pump plus I replaced the timing belt in below freezing weather I was about to push the car off a cliff. I think this is the final straw before I retire this POS. After I get paid Im putting my gasoholic cabriolet on the road with it's 2bbl holley carb and 3speed slushbox.
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Last Edit: September 21, 2012, 02:47:34 pm by srgtlord
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Reply #3
September 21, 2012, 03:33:00 pm
bajacalal
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Re: Timing belt chewed up/ covered in oil
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Reply #3 on:
September 21, 2012, 03:33:00 pm »
I think you might have had it misaligned between the pulleys when you put it all back together and it snagged one of the covers when you started the engine.
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Reply #4
September 21, 2012, 05:57:26 pm
srgtlord
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Re: Timing belt chewed up/ covered in oil
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Reply #4 on:
September 21, 2012, 05:57:26 pm »
Mind you the belt was fine 3 months ago the first time i checked. . I replaced the belt in march
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Reply #5
September 21, 2012, 07:20:54 pm
srgtlord
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Re: Timing belt chewed up/ covered in oil
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Reply #5 on:
September 21, 2012, 07:20:54 pm »
Well I just pulled apart the timing cover and found oil caked on near the crankshaft and near the tensioner. The belt actually seems to be tensioned correctly and there is a light coat on the timing belt. I guess I made it worse in my head .
I noticed when I was turning the engine over by hand the timing belt was slightly riding side to side on the cam and injection pump. Maybe the pump shaft is slightly bent? The belt is lighty frayed in some areas and at one particular area there is a quarter of an inch wide chunk by about 2 inches long dangling from the belt.
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Last Edit: September 21, 2012, 07:34:08 pm by srgtlord
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Reply #6
September 21, 2012, 11:11:59 pm
burn_your_money
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Re: Timing belt chewed up/ covered in oil
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Reply #6 on:
September 21, 2012, 11:11:59 pm »
Good thing the Germans over-engineered just about everything on these engines
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Tyler
Reply #7
September 25, 2012, 08:31:19 am
srgtlord
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Re: Timing belt chewed up/ covered in oil
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September 25, 2012, 08:31:19 am »
Is it possible that I had the belt off centered on one of the pullies and over time it wore out because of the error? Im still curious as to what happened to the belt.
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Reply #8
September 25, 2012, 03:13:48 pm
8v-of-fury
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Re: Timing belt chewed up/ covered in oil
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Reply #8 on:
September 25, 2012, 03:13:48 pm »
Is it the outside edge that is chewed? Do you have the intermediate pulley that has got the raised edges.
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Reply #9
September 25, 2012, 03:16:30 pm
srgtlord
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Re: Timing belt chewed up/ covered in oil
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Reply #9 on:
September 25, 2012, 03:16:30 pm »
It is the flat version of the pulley
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Reply #10
September 25, 2012, 03:48:21 pm
8v-of-fury
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Re: Timing belt chewed up/ covered in oil
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Reply #10 on:
September 25, 2012, 03:48:21 pm »
Can we get pictures of how it is tracking on each pulley? It should make it easier to tell what is misaligned. My guess is on the pump bracket though as it is usually what the problem is.
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Reply #11
October 01, 2012, 12:19:39 pm
srgtlord
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Re: Timing belt chewed up/ covered in oil
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Reply #11 on:
October 01, 2012, 12:19:39 pm »
From looking at it its definitely the pump bracket that needs adjusrting because the belt is tracking to the edge of the injection pump pulley and by the time it gets to the intermediate shaft it is riding off a tadbit.
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Reply #12
October 03, 2012, 12:23:11 am
pointynoggin
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Re: Timing belt chewed up/ covered in oil
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Reply #12 on:
October 03, 2012, 12:23:11 am »
That has happened to me but not as bad as your situation. There is a L shaped bracket that ties the pump mounting plate to the block and one of the bolt holes is a slot. You have to loosen the bolt in the slotted hole and pull the bracket to make the pump pulley parallel to the others. You can use a straight edge or just eyeball it then tighten it down and spin the crank over a few times to check if the belt walks over.
Easy as pie.
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1991 Jetta 1.6TD, Giles Superpump,
Reply #13
October 03, 2012, 07:15:48 am
srgtlord
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Re: Timing belt chewed up/ covered in oil
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Reply #13 on:
October 03, 2012, 07:15:48 am »
Do you happen to know which hole in the bracket is slotted?
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Reply #14
October 03, 2012, 11:14:58 pm
pointynoggin
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Re: Timing belt chewed up/ covered in oil
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October 03, 2012, 11:14:58 pm »
I'd have to look. I can check tomorrow but I think you can spot it. It is a ~3/4" flat bar bent 90degs with 1" legs or so and is in front of the pump bolted to the pump bracket and the block. I'll get out of bed and look.......ok it is bolted to the AC bracket vertical hole downward and to the pump plate horizontal to the pass side. The vertical hole is a slot. And the legs have a gusset. It is just in front of the pump a bit low.
I should learn to post picks.
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1991 Jetta 1.6TD, Giles Superpump,
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Timing belt chewed up/ covered in oil