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460 Timing Chain Broken while idling??

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Old Jan 5, 2004 | 01:11 PM
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Question 460 Timing Chain Broken while idling??

My timing chain went while the truck was idling in gear, and I was wondering if the valves would hit the pistons?? It is an 88 FI, as far as I know it WAS a stock cam, but it did have the straight up timing set in it when I opened it up. The reason I ask is I found two bent pushrods, number 5 from the front on the right bank, and number 4 from the front on the left bank. It is back together now, but how much should I be worried?? Thanks.

PS, tried to use the search, but haven't been able to get on it for quite a while now. Cheers.
 
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Old Jan 5, 2004 | 01:27 PM
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If the pushrods are bent, then there was contact with the pistons. It is possible that the valve stems could also have been bent. IIRC, those are both exhaust valves.
 
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Old Jan 6, 2004 | 11:13 PM
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do a compresion test it happend to me once
 
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Old Jan 7, 2004 | 08:58 AM
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Definitely need to fix this problem and check the pushrods, valve stems etc. You could potentially crack a valve guide and then you have a problem, so inspect and fix before runnig it more.

Jim Henderson
 
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