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Mod | | | Forums66 Topics128,021 Posts1,055,355 Members48,420 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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on the Internet for over 30 years! and not clogged down
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| | | | Joined: Jan 2009 Posts: 101 Wrench Fetcher | | Wrench Fetcher Joined: Jan 2009 Posts: 101 | I have a 60 235 ci with original hydra-matic in my 54 pick up. Good oil pressure and tuned recently. When I run it at 55 mph for about ten minutes I begin to hear a loud "clacking" noise. Sounds like lifters or valves. Not a knock. When I slow down, the noise disappears within a minute. Any ideas on what this could be? Thanks in advance.
Disciple
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