March 25th, 2015, 08:54 PM
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Senior Member
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Join Date: Jan 2013
Location: Rohnert Park, ca.
Truck: 1968 KM2500
Posts: 1,325
Rep Power: 415
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Re: Yikes!!! 305E V6 knocking like crazy!
Quote:
Originally Posted by David R Leifheit
I strongly second this.
I had a knock, it wasn't bad so I ignored it. At 55 mph the knock stopped, so did the truck. I had dropped a rod cap, the knocking was the piston slapping the head (had a nice imprint of the valves on it). BIG mistake to ignore any noise, or "get used to it" as I did.
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Carbon build up on the piston could be a possible problem. 
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