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Weird Piston Damage

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  #11  
Old 09-22-2023, 02:40 PM
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Originally Posted by Dodgevity
So this used motor, was that from a private seller? Seems unscrupulous.
Yes it was. I had a heck of a time finding a motor. Wreckers wanted close to $3000 for one with 300,000 km (186,000 miles)
 
  #12  
Old 09-22-2023, 02:49 PM
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Originally Posted by fj5gtx
If you didn't trade in your original knocking engine, might be able to get one good piston out of that one and get back on the road. Have the head checked though, due to piston pieces pounding it.
Yes I did, I was planning on rebuilding it.
Thats what I was thinking as well. It'll get me by for now. Luckily enough this is #1 cylinder, I can do everything in the truck.
 
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Old 09-24-2023, 04:14 PM
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Originally Posted by Prismatic
Detonation, broken ring lands. Ran super lean.
partially clogged injector
OR perhaps a lower injector seal (vacuum) leak
(too much air)
 

Last edited by FabricGATOR; 09-24-2023 at 04:17 PM.
  #14  
Old 10-03-2023, 02:10 PM
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Originally Posted by FabricGATOR
partially clogged injector
OR perhaps a lower injector seal (vacuum) leak
(too much air)
Well I hope all new gaskets and "O" rings on injectors fixes isdue.

Thanks for the reply, i never thought of injector "O" ring in trying to diagnose the problem.
 
  #15  
Old 10-03-2023, 02:29 PM
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Originally Posted by Undergrad35
Well I hope all new gaskets and "O" rings on injectors fixes isdue.

Thanks for the reply, i never thought of injector "O" ring in trying to diagnose the problem.
Trouble shooting: With the vehicle running, spray some wd-40 around the base of the injectors and listen for a change in idle as the oil is temporarily sealing or getting sucked into the intake..

Should be installing new injector seals every time injector is removed. I also use a little silicon grease on the injector o-rings to help them get installed without getting 'rolled' into an odd position. The best position for an installed o-ring is the natural position.
 



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