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8 members (Woogeroo, Nick in Manitou, Jon G, baldeagle, FAST55, Hanks custodian, mick53, 50Chevy3100),
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Mod | | | Forums66 Topics128,014 Posts1,055,332 Members48,419 | | 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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with Ads!  Again, thanks!
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#61113 05/30/2006 2:14 PM | Joined: Apr 2004 Posts: 84 Member | | Member Joined: Apr 2004 Posts: 84 | Went out this morning and the truck fired right up as usual. Listened for the knocking noise. Here's what I found out: It's come from the last cylinder at rear of engine. I only knocks when motor is reved-up but not at high RPM or at idle speed. Pulled the plug wire to that cylinder and it was more noticeable. I also got a slight shock when pulling that wire. The others didn't do this to me. Could be a bad wire or stray current as this wire is near the coil and starter wires. So is it a bad rod, bearing or what? P.S. Frank50 I bought this truck up by you at a lot in Staunton, Ill. | | |
#61114 05/30/2006 3:08 PM | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | It's pretty difficult to diagnose without being there but it sound like a rod bearing. If your 216 has babbeted rods that's probably where the problem lies.
Save a life, adopt a senior shelter pet.
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Name your dog Naked so you can walk Naked in the park.
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#61115 05/30/2006 4:10 PM | Joined: Aug 2005 Posts: 157 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2005 Posts: 157 | Tiny has probably called it correctly. A wrist pin usually makes a "clucking" sound, although I suppose you could argue that it is a rear main bearing. in my (limited) experience, rear mains make kind of a "rumbling" sound at idle and just above.
If it were mine: I'd drop the pan before it got worse, and check the rod clearance on the crank. You can probably remove a shim or so if need be. Take a real close look at the oil pickup scoops and the oil pan oil carriers while you're in there. Procedure is described nicely in the shop manual for your truck. | | |
#61116 05/30/2006 6:42 PM | Joined: Nov 2000 Posts: 1,966 'Bolter | | 'Bolter Joined: Nov 2000 Posts: 1,966 | buddha I know where you are talking about and have been there. I visit their web page often to keep up with what they have. Some of their stuff looks really nice and some of it....I agree with the others that you need to pull the pan and check it out. Good luck!  Have you posted a picture of that thing to the Gallery? Peg loves old truck pictures. :rolleyes:
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