RX 7 Eating Belts??????
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Joined: Oct 2006
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From: YUMA AZ
RX 7 Eating Belts??????
I had to replace the belt that runs from the alternator, air pump and AC unit. It shredded to pieces yesterday and its starting to shred the new one. Has this happened to anyone? The mechanic said something might be ceasing up. Maybe if it has happened in someone else's maybe you could get me pointed in the right direction on what i might have to replace.
My first engine did not have belt issues. When that engine was replaced due to failing (Mazda assembly error), the new engine would cut off the outer (front) rib of the PS and A/C belt as the belt jumped out one rib on the PS pulley.
To cure the cause on that engine and my current engine, the PS pulley had to be shimed 1/16" out from the pump. This has worked for 8 years now.
Does not make any sense unless the block or mounting bracket on my original 03/1992 car was a little different than later engines. Only the engines were changed.
To cure the cause on that engine and my current engine, the PS pulley had to be shimed 1/16" out from the pump. This has worked for 8 years now.
Does not make any sense unless the block or mounting bracket on my original 03/1992 car was a little different than later engines. Only the engines were changed.
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Junior Member
Joined: Oct 2006
Posts: 10
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From: YUMA AZ
It is actually the water pump instead of the AC. The first rib started to come off on the new belt so i ripped the whole thing off. It's been running fine on four ribs but i have gotten the rpms past 3 grand. not sure if i want to push it just yet.
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Racecar - Formula 2000
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From: Bath, OH
It sounds like something is misaligned.
Check to see if any of the brackets that hold pulleys, etc., are loose, cracked, or have missing bolts. Also, as bryant alluded to, check to see that all the pulleys themselves and their bearings are OK and that none of them are out of alignment.
If you can, use a straight-edge (it'll be difficult - there is not much room) to make sure every pulley's grooves line up in the same plane (nothing at an angle or forward of or behind the rest).
When you put another new belt back on, make sure it rests properly in the grooves and is not hanging over the edge of one or more.
Check to see if any of the brackets that hold pulleys, etc., are loose, cracked, or have missing bolts. Also, as bryant alluded to, check to see that all the pulleys themselves and their bearings are OK and that none of them are out of alignment.
If you can, use a straight-edge (it'll be difficult - there is not much room) to make sure every pulley's grooves line up in the same plane (nothing at an angle or forward of or behind the rest).
When you put another new belt back on, make sure it rests properly in the grooves and is not hanging over the edge of one or more.
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Oct 17, 2020 03:25 PM