C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

drive belt tensioner

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Old May 13, 2008 | 01:26 AM
  #1  
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Default drive belt tensioner

I discovered my belt was broken on my way to work, what a pleasant surprise. The belt was slightly brittle and looked like maybe I just overlooked it one too many times so I replaced it to only have my new one brake. I looked at my tensioner and the belt wear indicator is showing it at the max. Is there a way for me to fix the tensioner without having to completely replace it or is that exactly what I need to do?
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Old May 13, 2008 | 08:05 AM
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No way to "fix" that I know of. If the pulley is bad you can replace it. Go by a NAPA store they usually have parts like that.
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Old May 13, 2008 | 01:58 PM
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if you do put a new tensioner on, i believe the bolt must be torqued to 30 ft/lbs. i took my belt off this weekend for a trans removal and believe 30 is the correct value.
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Old May 13, 2008 | 02:45 PM
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Originally Posted by denise84
I looked at my tensioner and the belt wear indicator is showing it at the max.
Unless your belt tensioner is weak or the pulley is sloppy, I doubt there is anything wrong with it. A broken belt is not the product of too weak a tensioner. The indicator is to show if the belt is worn or stretched to a point where the tensioner can't keep the proper tension on the belt to keep it from slipping. Chances are the new belt broke because of mishandling during installation (it could have got cut?) or maybe because it was too small. Does the tensioner show to be at the max with a belt installed? If so, the belt is too long. It should show "max" with no belt installed.

RACE ON!!!
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Old May 13, 2008 | 02:48 PM
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Originally Posted by janarvae
if you do put a new tensioner on, i believe the bolt must be torqued to 30 ft/lbs. i took my belt off this weekend for a trans removal and believe 30 is the correct value.
You removed the serpentine belt to remove the transmission???

RACE ON!!!
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Old May 13, 2008 | 04:37 PM
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Originally Posted by CFI-EFI
You removed the serpentine belt to remove the transmission???

RACE ON!!!
Well I used the search function and found an 'Info' post that said to remove when replacing the torque converter (http://forums.corvetteforum.com/show...ertor+install). I figure it can't do any harm anyways.

Jonathan
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Old May 13, 2008 | 06:34 PM
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Check all the pullies for loosness or wobble; if all ok, install a belt sized to put the tensioner indicator in the center of the two referance marks.
Then start the engine and observe belt and pully motion for any anomolies.
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Old May 13, 2008 | 06:35 PM
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Originally Posted by janarvae
Well I used the search function and found an 'Info' post that said to remove when replacing the torque converter. I figure it can't do any harm anyways.

Jonathan
So you went ahead and removed the belt at the opposite end of the engine from which you were working, without wondering or questioning why.


There seems to be a lot of equally valuable advice like that flying around.

RACE ON!!!
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Old May 13, 2008 | 06:43 PM
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I did wonder why I had to remove it, but I figured it was a similar reason to removing the distributor cap (although the cap is plastic and could clearly be damaged by the engine tilting/moving backwards). I'm no expert and the CF member had done it before and nobody who read the post said any differently. No harm done anyways. Plus, now I know how to remove it should the time come.

I guess you (CFI-EFI) and other truly knowledgeable members can't read every post to correct people and give the right info (no sarcasm intended -- genuine statement).

Jonathan
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Old May 13, 2008 | 06:52 PM
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Originally Posted by CFI-EFI
So you went ahead and removed the belt at the opposite end of the engine from which you were working, without wondering or questioning why.


There seems to be a lot of equally valuable advice like that flying around.

RACE ON!!!
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Old May 13, 2008 | 07:03 PM
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Well I used the search function and found an 'Info' post that said to remove when replacing the torque converter
I wonder if that was to reduce engine resistance to rotating the flywheel??
Did info post also say to remove the spark plugs?
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Old May 13, 2008 | 07:34 PM
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Originally Posted by 65Z01
I wonder if that was to reduce engine resistance to rotating the flywheel??
Did info post also say to remove the spark plugs?
No to the spark plug removal. I put together 4 or 5 pages collected from different threads on the forum to help me through the removal, rebuild, and reinstallation. I want everything done right the first time.

Jonathan
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Old May 13, 2008 | 07:48 PM
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I want everything done right the first time.
I hear that, considering the "fun" involved in swapping a TC...
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Old May 13, 2008 | 07:58 PM
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Originally Posted by 65Z01
I hear that, considering the "fun" involved in swapping a TC...
Yea, and I'm not just swapping the TC out, I'm changing the internals and adding an external tranny cooler. I have a post out about it.
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Old May 13, 2008 | 08:10 PM
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Originally Posted by janarvae
I did wonder why I had to remove it, but I figured it was a similar reason to removing the distributor cap (although the cap is plastic and could clearly be damaged by the engine tilting/moving backwards). I'm no expert and the CF member had done it before and nobody who read the post said any differently. No harm done anyways. Plus, now I know how to remove it should the time come.
You are correct in that there was no harm done. I usually look for steps I can skip, rather than to add. Like removing the fan on my car to get the steering rack out. To me, it didn't seem necessary. It was, but no harm, no foul. When the rack wouldn't clear the fan, I removed it. I saved a lot of time, by skipping steps from the FSM in changing the rear wheel bearings. Removing the distributor cap, on the trans job, clearly can save a broken cap.

RACE ON!!!
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Old May 13, 2008 | 08:16 PM
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Originally Posted by CFI-EFI
You are correct in that there was no harm done. I usually look for steps I can skip, rather than to add. Like removing the fan on my car to get the steering rack out. To me, it didn't seem necessary. It was, but no harm, no foul. When the rack wouldn't clear the fan, I removed it. I saved a lot of time, by skipping steps from the FSM in changing the rear wheel bearings. Removing the distributor cap, on the trans job, clearly can save a broken cap.

RACE ON!!!
I think that the reason a lot of the FSM steps seem superfluous is because they are! It is probably so the dealer can bill more hours. However, I don't like to skip any steps when I am not being charged by the hour.

Jonathan
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Old May 13, 2008 | 09:40 PM
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Originally Posted by CFI-EFI
Unless your belt tensioner is weak or the pulley is sloppy, I doubt there is anything wrong with it. A broken belt is not the product of too weak a tensioner. The indicator is to show if the belt is worn or stretched to a point where the tensioner can't keep the proper tension on the belt to keep it from slipping. Chances are the new belt broke because of mishandling during installation (it could have got cut?) or maybe because it was too small. Does the tensioner show to be at the max with a belt installed? If so, the belt is too long. It should show "max" with no belt installed.

RACE ON!!!
I think they gave you the wrong belt (too long) It happend to me,until I went to a chevy dealer.It was cheaper than Napa,and it was the right one.
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