Serpentine tensioner knocks when engine/cams lope
#1
Serpentine tensioner knocks when engine/cams lope
(Resolved in post #9)
Anyone out there have this same issue? When the car idles below 1300RPM the alt/serpentine auto tensioner makes a loud knocking sound when the car idles/cams lope. I put a different one on the car and it made the same noise. Car has GSC S3's.
I'm thinking there's no way around the issue without increasing the idle unless someone made their own manual tensioner for the belt.
Anyone out there have this same issue? When the car idles below 1300RPM the alt/serpentine auto tensioner makes a loud knocking sound when the car idles/cams lope. I put a different one on the car and it made the same noise. Car has GSC S3's.
I'm thinking there's no way around the issue without increasing the idle unless someone made their own manual tensioner for the belt.
Last edited by badev0; Oct 7, 2013 at 01:41 PM.
#5
It is not rod knock, it is definitely the tensioner. It made the same noise on two different motors; my old stock one which was perfect when torn apart and my new built one.
Two local Evo guys have had the same issue. I put my head right next to it and its blatantly obvious its the tensioner as it makes the noise when the tensioner physically moves back and forth against the belt when the cams lope. I think maybe both tensioners I tried on my car were not in good shape and just worn out. Maybe I will try a new one.
Two local Evo guys have had the same issue. I put my head right next to it and its blatantly obvious its the tensioner as it makes the noise when the tensioner physically moves back and forth against the belt when the cams lope. I think maybe both tensioners I tried on my car were not in good shape and just worn out. Maybe I will try a new one.
Trending Topics
#9
I thought about it and remember I run a Gates K060578 which is 58 3/8 long for deleted A/C. When you release the tensioner to press on the belt, it turns a good amount to add tension to the belt.. a lot more then my stock daily driver Evo tensioner does. I went and got the K060569 which is 57 1/2 long which fixed how far the tensioner has to reach for the belt and took care of the knocking noise
So in the end.. if you're deleting your A/C, run the 57.5" long belt. I hear the 57 is a bit too tight.
Scott
Last edited by badev0; Oct 7, 2013 at 01:42 PM.
Thread
Thread Starter
Forum
Replies
Last Post