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Old 04-18-2003, 09:36 PM
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Post Rod knock fix advice.

The 350 in my truck blew the remote mount cooler/filter line and blew 9 quarts on the road. I made it a block before I noticed a pressure drop, and shut it down.
Upon opening the hood I seen the problem right away, fixed it by re-attatching the line and walking another block to the local gas station for oil.
A couple weeks later it started lightly knocking and progressively got worse until I just stopped it and parked it for the winter.
I have gotten new rod and main bearings, along with the lower half gasket set.
I also got a .10,.10 under crank.
Should the reciprocating assembly be rebalanced as a whole? The engine itself only has around 15,000 miles since it was built.

[ April 19, 2003: Message edited by: M&M CUSTOM ]</p>

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Old 04-19-2003, 05:06 AM
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I would rebalancing the rotating system to be safe.
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Old 04-19-2003, 09:13 AM
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I wouldn't worry about. Been in the business (including as a machinist) and have sold, ground and installed lots of cranks/kits and the only balance problem I encountered was a early '80's 302 Ford that the grinder had packaged a 255 crank in ( it is the same stroke but has hollow throws) which created a strange vibe.
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Old 04-19-2003, 09:18 AM
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Woods is correct, check your crank casting no. most end in 442, that will be an exact replacement, but small block chevy's seldom have balance problems in a street type vehicle, now 302 Fords are another headache, lite weight, heavy weight, no slinger , small slinger, large slinger, year etc.
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Old 04-20-2003, 09:02 AM
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Both the new and old cranks are #442's and the truck is a workhorse grunter.
I use this truck for plowing, pulling, and towing.
Whatever this truck engine can't do- the transmission and transfer case allow it to.
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Old 04-20-2003, 05:48 PM
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Some 305 chevy cranks have the 442 casting number.They have a much lighter piston weight than a 350. Its hard to tell the difference between the two with out checking them on a balancer. If the old crank is not damaged to bad, you could have it reground. Or get the crank kit crank balanced. If you have had a bearing failure in this engine it would be a good idea to get the rod size checked. Good luck!
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