Cam pulley
Posted: Wed Jul 20, 2022 7:49 am
Morning all,
Recently did the head gasket and all was fine. After a few weeks, what sounded like a bearing grinding noise started. This got progressively worse and the engine began stalling at low revs. Whipped the cam ladder off, pulleys and belt.
On the exhaust cam pulley, the key way for the roll pin had been enlarged by repeated movement back and forth by around 6mm. The cam pulley washer had also been worn down on one side. The roll pin does not look distorted.
What could have caused this ?
Is it likely that I didn’t tighten the bolt correctly ?
Could there have been pre existing enlargement of the key way that I failed to notice ?
I am a little reluctant to reassemble it until a reasonable theory is arrived at.
All the best
Paul
Recently did the head gasket and all was fine. After a few weeks, what sounded like a bearing grinding noise started. This got progressively worse and the engine began stalling at low revs. Whipped the cam ladder off, pulleys and belt.
On the exhaust cam pulley, the key way for the roll pin had been enlarged by repeated movement back and forth by around 6mm. The cam pulley washer had also been worn down on one side. The roll pin does not look distorted.
What could have caused this ?
Is it likely that I didn’t tighten the bolt correctly ?
Could there have been pre existing enlargement of the key way that I failed to notice ?
I am a little reluctant to reassemble it until a reasonable theory is arrived at.
All the best
Paul