Chain strech
Greasy, it is amazing what a small amount of stretch in chain can do. This reminded me of my 1 and only (so far) VW 2.5 nightmare. After pulling head and lapping 4 valves for jumped chain. Customer wanted only guides and tensioner replaced. Good for 2 days. Jumped again during cold start, high idle. Banged all 10. Set a steel ruler in vice, leveled it with a torpedo level. Hung new and old chain next to each other, about 1/2 pin stretch through half the chain. When assembled the tensioner hardly budged after releasing it. No more issues after chain.
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Greasy, it is amazing what a small amount of stretch in chain can do. This reminded me of my 1 and only (so far) VW 2.5 nightmare. After pulling head and lapping 4 valves for jumped chain. Customer wanted only guides and tensioner replaced. Good for 2 days. Jumped again during cold start, high idle. Banged all 10. Set a steel ruler in vice, leveled it with a torpedo level. Hung new and old chain next to each other, about 1/2 pin stretch through half the chain. When assembled the tensioner hardly budged after releasing it. No more issues after chain.
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