Belt flying off 4 times now |
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Belt flying off 4 times now |
scottsilvertt |
Sep 20 2022, 08:04 AM
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#1
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scottsilvertt Group: Members Posts: 66 Joined: 17-May 06 From: South East USA Member No.: 6,019 Region Association: South East States |
I took my engine out of my car.
Repainted all sheet metal, repaired this and that. Put the engine back in. Put on a new German belt, it flew off in 10 minutes. And then again. Put the old belt on, that has flown off twice. Using a straight edge, I can measure a 1/2 inch misalignment in the pulleys. I can’t even imagine how they became misaligned. I would think it could only go back together one way. The alternator pulley is further out towards front of car. With the engine pulley closer to rear of car. The engine pulley seems nice and flush around its surrounding cover stuff. I can only imagine that the alt pulley is turned around. So, I can try flipping that. But is there a spacer behind the engine pulley? I don’t think I ever removed the engine fan/pulley. |
ConeDodger |
Sep 20 2022, 08:30 AM
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#2
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Apex killer! Group: Members Posts: 23,615 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California |
It will fly off d/T misalignment. Doesn’t take much either. I once powder coated the washers and such and started throwing belts like it was a competition. @McMark figured it out.
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mgphoto |
Sep 20 2022, 09:03 AM
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#3
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"If there is a mistake it will find me" Group: Members Posts: 1,339 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
Your fan pulley is out of alignment with your alternator pulley, take a straight edge a look to see which direction it is off.
Probably have to remove some of the sheet metal under the car to make adjustments. |
ClayPerrine |
Sep 20 2022, 11:10 AM
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#4
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Life's been good to me so far..... Group: Admin Posts: 15,525 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
The factory put a spacer between the fan and the crank. If it is missing, it will cause the misalignment you are seeing. If you can't find the spacer, just put an AC pulley in there. They are the same thickness, and the pulley won't hurt a thing.
Hope that helps. Clay |
930cabman |
Sep 21 2022, 09:40 AM
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#5
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Advanced Member Group: Members Posts: 3,162 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
Your fan pulley is out of alignment with your alternator pulley, take a straight edge a look to see which direction it is off. Probably have to remove some of the sheet metal under the car to make adjustments. (IMG:style_emoticons/default/agree.gif) Somewhere something didn't get back to where it was. I would put $5. on it |
Eric_Shea |
Sep 21 2022, 11:38 AM
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#6
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PMB Performance Group: Admin Posts: 19,278 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
Flip the pulley
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TheCabinetmaker |
Sep 22 2022, 10:39 AM
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#7
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I drive my car everyday Group: Members Posts: 8,304 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Flip it.
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GregAmy |
Sep 22 2022, 10:48 AM
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#8
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Advanced Member Group: Members Posts: 2,311 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
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scottsilvertt |
Sep 22 2022, 02:43 PM
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#9
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scottsilvertt Group: Members Posts: 66 Joined: 17-May 06 From: South East USA Member No.: 6,019 Region Association: South East States |
This is my car, with the old belt for now.
I can see pulleys are not parallel. As well as measure. The small pulley is too far to the front. And the small pulley doesn’t look like the one on eBay, which doesn’t have the notches. (I am trying a looser belt, less tension, to see if it stays on longer) Anyone have a photo of their pulley? In an engine sitting in their garage? |
Al Meredith |
Sep 22 2022, 03:07 PM
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#10
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Senior Member Group: Members Posts: 960 Joined: 4-November 04 From: Atlanta, ga Member No.: 3,061 |
I one time removed the pully from, the cast fan blades to paint the pully. I didn't center the big pully on the fan housing and would through a belt at about 4/5000 RPM.
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yeahmag |
Sep 22 2022, 04:11 PM
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#11
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Advanced Member Group: Members Posts: 2,423 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
This is my car, with the old belt for now. I can see pulleys are not parallel. As well as measure. The small pulley is too far to the front. And the small pulley doesn’t look like the one on eBay, which doesn’t have the notches. (I am trying a looser belt, less tension, to see if it stays on longer) Anyone have a photo of their pulley? In an engine sitting in their garage? That pulley is on backwards. The cut outs go towards the outside (used to hold the pulley when tightening it). |
scottsilvertt |
Sep 22 2022, 07:40 PM
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#12
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scottsilvertt Group: Members Posts: 66 Joined: 17-May 06 From: South East USA Member No.: 6,019 Region Association: South East States |
Somehow, I’ll get that thing turned around while in the car.
Thanks for confirmation. |
Dave_Darling |
Sep 24 2022, 04:03 AM
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#13
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914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
Replacing the alternator is possible without dropping the motor. You may have to remove the left-front piece of engine tin--I did on my car, but I don't remember if it was actually necessary. There were also a bunch of times that I worked from the top side then the bottom side and went back and forth like that.
Of course, once I got it all back together I forgot to hook up the charging wire to the starter... D'OH! A quick fix, but took a little while to notice the error. --DD |
bbrock |
Sep 24 2022, 08:00 AM
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#14
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
Replacing the alternator is possible without dropping the motor. You may have to remove the left-front piece of engine tin--I did on my car, but I don't remember if it was actually necessary. There were also a bunch of times that I worked from the top side then the bottom side and went back and forth like that. Of course, once I got it all back together I forgot to hook up the charging wire to the starter... D'OH! A quick fix, but took a little while to notice the error. --DD I just did this a month ago. Yes, left front engine tin has to come off. I also had to remove the left warm air guide from the heat exchanger to have room to pull the alternator. I think you might have room to flip the bracket without taking the alternator out of its bracket though. |
930cabman |
Sep 24 2022, 08:05 AM
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#15
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Advanced Member Group: Members Posts: 3,162 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
Replacing the alternator is possible without dropping the motor. You may have to remove the left-front piece of engine tin--I did on my car, but I don't remember if it was actually necessary. There were also a bunch of times that I worked from the top side then the bottom side and went back and forth like that. Of course, once I got it all back together I forgot to hook up the charging wire to the starter... D'OH! A quick fix, but took a little while to notice the error. --DD I just did this a month ago. Yes, left front engine tin has to come off. I also had to remove the left warm air guide from the heat exchanger to have room to pull the alternator. I think you might have room to flip the bracket without taking the alternator out of its bracket though. I just replaced the alternator last week and did not remove the tin, but probably much easier. There may have been a few choice Italian words used in the process. I did not have the heat pipes installed prior |
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