Sorry for the long post.
1. Had a shop install Metco 4lb lower, 3.2 alternator pulley, and LT headers. They put K080794HD FLEETRUNNER MICRO-V 8 79.45” belt on…..Noise starts as an occasional chirp then progresses to all out squeal.
2. Seems like noise is coming from tensioner pulley, makes sense since it’s the only factory one left. Had shop replace tensioner pulley with Metco HD idler and did Roush tensioner upgrade at the same time. This time they put on K080797HD FLEETRUNNER MICRO-V 79.62” belt….squeal is gone, but now a rattle noise under light acceleration that progresses to loud wrapping noise. With dyno tune date quickly approaching took it back to the shop. Everything looks good to the eye. Tried reinstalling factory tensioner and pulley loud wrapping noise still there. Last resort try another belt. The only one in stock is extremely tight K080790HD FLEETRUNNER MICRO-V 78.9”, wrapping noise goes away. Drive home 40 miles on the highway noise free. Next day squeal is back, but not the really bad wrapping noise. I had the old K080794HD belt and was able to get it on, but it’s still pretty tight. Mild squeal still. Make it 2 hour drive each way to dyno appointment.
3. While changing belts I noticed a slight squeak when turning the alternator by hand. After trying all the above, I’m thinking it must be what is causing the noise….Replace alternator, also move up to recommended 3.5 alternator pulley, and go back to the longer 797 belt….shakedown cruise seems fine, then the after about 10 miles the wrapping noise comes back. Put the smaller 794 belt on and it’s also making the wrapping noise now. Also put the Roush tensioner and Metco idler back on since it did not seem to have anything to do with the noise.
4. Doing research trying to figure this mess out, I see a post on SVTP forums saying don’t forget this spacer on lower alternator bracket when using the Metco kit. I notice the spacer is not there on my car. Make a spacer and put it in….still wrapping noise, but much quieter.
5. I call Metco for help. They recommend 81.5” long belt with 3.0 upper, 4lb lower, idlers 3x100 and 1 x90, and 3.5 alternator pulley. All of the belts I had been using to this point were a lot shorter, so I figure I’d give it a try. The only belt in stock that day was K080810HD FLEETRUNNER MICRO-V 81.04”…..Shakedown cruise it’s silent, after 100 miles only occasional squeak/squeal. The the belt is pretty loose, but not so loose I could get on without removing snub idler. I’m not sure if it’s slipping, but at least I’m not afraid to take the car out and enjoy it. I’ve read lots of people complain about he green belts, but I had one for over a year before all this with no issues.
My question is should I get the K080810RPM belt? Will the K080797RPM be too tight?
1. Had a shop install Metco 4lb lower, 3.2 alternator pulley, and LT headers. They put K080794HD FLEETRUNNER MICRO-V 8 79.45” belt on…..Noise starts as an occasional chirp then progresses to all out squeal.
2. Seems like noise is coming from tensioner pulley, makes sense since it’s the only factory one left. Had shop replace tensioner pulley with Metco HD idler and did Roush tensioner upgrade at the same time. This time they put on K080797HD FLEETRUNNER MICRO-V 79.62” belt….squeal is gone, but now a rattle noise under light acceleration that progresses to loud wrapping noise. With dyno tune date quickly approaching took it back to the shop. Everything looks good to the eye. Tried reinstalling factory tensioner and pulley loud wrapping noise still there. Last resort try another belt. The only one in stock is extremely tight K080790HD FLEETRUNNER MICRO-V 78.9”, wrapping noise goes away. Drive home 40 miles on the highway noise free. Next day squeal is back, but not the really bad wrapping noise. I had the old K080794HD belt and was able to get it on, but it’s still pretty tight. Mild squeal still. Make it 2 hour drive each way to dyno appointment.
3. While changing belts I noticed a slight squeak when turning the alternator by hand. After trying all the above, I’m thinking it must be what is causing the noise….Replace alternator, also move up to recommended 3.5 alternator pulley, and go back to the longer 797 belt….shakedown cruise seems fine, then the after about 10 miles the wrapping noise comes back. Put the smaller 794 belt on and it’s also making the wrapping noise now. Also put the Roush tensioner and Metco idler back on since it did not seem to have anything to do with the noise.
4. Doing research trying to figure this mess out, I see a post on SVTP forums saying don’t forget this spacer on lower alternator bracket when using the Metco kit. I notice the spacer is not there on my car. Make a spacer and put it in….still wrapping noise, but much quieter.
5. I call Metco for help. They recommend 81.5” long belt with 3.0 upper, 4lb lower, idlers 3x100 and 1 x90, and 3.5 alternator pulley. All of the belts I had been using to this point were a lot shorter, so I figure I’d give it a try. The only belt in stock that day was K080810HD FLEETRUNNER MICRO-V 81.04”…..Shakedown cruise it’s silent, after 100 miles only occasional squeak/squeal. The the belt is pretty loose, but not so loose I could get on without removing snub idler. I’m not sure if it’s slipping, but at least I’m not afraid to take the car out and enjoy it. I’ve read lots of people complain about he green belts, but I had one for over a year before all this with no issues.
My question is should I get the K080810RPM belt? Will the K080797RPM be too tight?