Dreadful T-DAY is here...Did I get lucky?
05-08-2004, 12:56 PM
#31
Burning Brakes
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Hi Warren,
The notch on the gear lines up with a notch on the rear cover. See Tony’s and John’s pictures:
http://members.rennlist.com/v1uhoh/checking.htm
http://members.rennlist.com/pirtle/tbelt.html
The notch is pretty small on the gear, and in the valley part of the tooth.
You may be 180 degrees off. If so, turn the crankshaft one more clockwise revolution to TDC again.
The notch on the gear lines up with a notch on the rear cover. See Tony’s and John’s pictures:
http://members.rennlist.com/v1uhoh/checking.htm
http://members.rennlist.com/pirtle/tbelt.html
The notch is pretty small on the gear, and in the valley part of the tooth.
You may be 180 degrees off. If so, turn the crankshaft one more clockwise revolution to TDC again.
05-27-2004, 07:48 PM
#32
Burning Brakes
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New Discovery on T-Belt issue
Thanks for help.....I looked at the timing marks and it appears to be okay. The belt looks in good shape. I started the engine and used a screwdriver stethoscope, what I found was their was a muted klacking noise coming from the timing belt cover.
While I was running it I could see the timing belt moving an 1/8" back and forth the the belt sprocket, and the noise I heard was in synchronicity with the belt moving. Anyone seen that kind of situation?
While I was running it I could see the timing belt moving an 1/8" back and forth the the belt sprocket, and the noise I heard was in synchronicity with the belt moving. Anyone seen that kind of situation?
05-27-2004, 09:00 PM
#33
Burning Brakes
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Okay, let me give you alittle more description. Its "wobbling at least an 1/8 to 3/16" on the belt sprocket when I look down the ventilation holes on the T-Belt covers. Can anyone tell me what parts might be causing a Belt Wobble?
I've got a weeble wobble for a timing belt!
I've got a weeble wobble for a timing belt!
05-27-2004, 09:04 PM
#34
Rennlist Member
It runs! 
Congrats on the good news. It does sound, however, that a TB style job is about to happen. Regardless of how good the belt looks (and that it is intact, tight, and has all it's teeth is better than good), the lateral motion would certainally have me opening it up for surgery.
A bad bearing in the tensioner roller, carrier arm bushings worn, water pump bearing going bad, etc. can cause the belt to mistrack. I'd vote for opening it up to diagnose - and then replace/rebuild all the usuals in a TB job.
Congrats on the good news. It does sound, however, that a TB style job is about to happen. Regardless of how good the belt looks (and that it is intact, tight, and has all it's teeth is better than good), the lateral motion would certainally have me opening it up for surgery.A bad bearing in the tensioner roller, carrier arm bushings worn, water pump bearing going bad, etc. can cause the belt to mistrack. I'd vote for opening it up to diagnose - and then replace/rebuild all the usuals in a TB job.
05-27-2004, 10:35 PM
#35
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That sounds like good news to me.
I have a crib full of your typical mechanics tools and the TB tensioner tool. Who has the flywheel lock tool at the best price? I dont have one yet. Any other wierd or special tools needed?
I have a crib full of your typical mechanics tools and the TB tensioner tool. Who has the flywheel lock tool at the best price? I dont have one yet. Any other wierd or special tools needed?
05-28-2004, 12:04 AM
#36
Rennlist Member
Warren, I found my flywheel lock tool at http://www.baumtools.com
The big 3 should be able to get them as well.
The big 3 should be able to get them as well.
05-28-2004, 04:11 AM
#37
Pro
Warren,
I had a somewhat similar situation when I bought my 1980 euro 928S. The PO had changed the belt but I was never told to retighten it. Later, upon a startup the belt started making really ugly noises and I stopped the car. I consulted this forum and everybody told me I had bent valves.
When I disassembled, I could not find the points, so I don't know if the belt jumped. But man was that belt loose! It had been flopping around and hitting the covers for a while and also had rubbed on the outside like yours. When I think about how the car was driven before I realised something was wrong...
The previous belt job had been done at the biggest and most used and respected Porsche garage in Norway(to great expense), but when I disassembled, the springs in the tensioner were all placed in the same direction(no spring!) and was smeared in grease, not oilfilled. I asked the workshop about the Porsche TB tool and they told me it wasn't needed!
Well, my car runs OK now, I may have bent valves but I have no indication of it. I did the TB job myself and will never give the car away to a garage again. With the help of Rennlist, you should be able to do everything on your car and sleep good at night.
Good luck!
I had a somewhat similar situation when I bought my 1980 euro 928S. The PO had changed the belt but I was never told to retighten it. Later, upon a startup the belt started making really ugly noises and I stopped the car. I consulted this forum and everybody told me I had bent valves.
When I disassembled, I could not find the points, so I don't know if the belt jumped. But man was that belt loose! It had been flopping around and hitting the covers for a while and also had rubbed on the outside like yours. When I think about how the car was driven before I realised something was wrong...
The previous belt job had been done at the biggest and most used and respected Porsche garage in Norway(to great expense), but when I disassembled, the springs in the tensioner were all placed in the same direction(no spring!) and was smeared in grease, not oilfilled. I asked the workshop about the Porsche TB tool and they told me it wasn't needed!
Well, my car runs OK now, I may have bent valves but I have no indication of it. I did the TB job myself and will never give the car away to a garage again. With the help of Rennlist, you should be able to do everything on your car and sleep good at night.
Good luck!
