98 XJR main drive / serpentine belt
Discussion
Help !
Opened a can of worms here, asked the guys servicing my car to change the supercharger belt as it was squealing
He said he would do them both so I said fine.
Now when the engine starts from cold the automatic tensioner pulley moves from side to side and causes a loud knocking sound. He is scratching his head now.
The car had no issue with this before it went in.
All the pulleys and tensioners are upgraded so any idea as to what is going on ?
Is there a specific procedure for the serpentine belt ?
After 15 to 20 seconds it stops knocking......
Opened a can of worms here, asked the guys servicing my car to change the supercharger belt as it was squealing
He said he would do them both so I said fine.
Now when the engine starts from cold the automatic tensioner pulley moves from side to side and causes a loud knocking sound. He is scratching his head now.
The car had no issue with this before it went in.
All the pulleys and tensioners are upgraded so any idea as to what is going on ?
Is there a specific procedure for the serpentine belt ?
After 15 to 20 seconds it stops knocking......
Aaaaaaarrrrgggggghhhh.....
Its doing it again, it has only been used once !
Its driving me insane this, I am wondering if its something to do with the upper pulley upgrade the car had a while ago.
I would really appreciate some help with this, if its a new belt, and the automatic tensioner pulley us new what more could this possibly be ?
If it had the upper pulley mod would it not tequire a shorter belt oris there an adjustment that the mechanic has not made ?
Thanks
Its doing it again, it has only been used once !
Its driving me insane this, I am wondering if its something to do with the upper pulley upgrade the car had a while ago.
I would really appreciate some help with this, if its a new belt, and the automatic tensioner pulley us new what more could this possibly be ?
If it had the upper pulley mod would it not tequire a shorter belt oris there an adjustment that the mechanic has not made ?
Thanks
I've had exactly the same problem with my 00 XKR.
Tensioner and idler replaced, still made the same noise. Worse when cold. Stripped one rib off two belts.
The knocking noise is the tensioner pulling the belt back square as it runs up over the alternator.
It's settled down now and is running true. My only thoughts are non genuine belt and it having a bit of memory.
My other thought is the alternator is pulling max load on start up. If it recurrs I'll be looking at that more closely.
Would be intruiged to know if others have had the same.
Tensioner and idler replaced, still made the same noise. Worse when cold. Stripped one rib off two belts.
The knocking noise is the tensioner pulling the belt back square as it runs up over the alternator.
It's settled down now and is running true. My only thoughts are non genuine belt and it having a bit of memory.
My other thought is the alternator is pulling max load on start up. If it recurrs I'll be looking at that more closely.
Would be intruiged to know if others have had the same.
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