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did timing belt, spun rod bearing

Old 09-04-2006, 02:29 PM
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Default did timing belt, spun rod bearing

anyone ever had anything like this happen? I did a timing belt on a friends dad's del sol. It's about the 25th D-series timing belt I've done, knocked it out in just under 2 hours. Started it up and almost instatly started knocking. I pulled apart the bottom end with the engine in the car, #1 rod bearing was spun. Any idea's how it could have happened? Ran perfect before the belt, 120k on it, timing belt is dead on.
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Old 09-04-2006, 02:32 PM
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Default Re: did timing belt, spun rod bearing

ive bever heard a rod bearing immediatly knocking, even if theirs no oil pressure. usualy takes it alittle to be audiable.
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Old 09-04-2006, 02:52 PM
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Default Re: did timing belt, spun rod bearing

it has nothing to do with the belt.
Did u make sure it ran fine before u take everything apart ? sounds like ur buddy is tryign to blame it on u
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Old 09-04-2006, 02:56 PM
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Default Re: did timing belt, spun rod bearing

Rod bearings = no oil pressure. Oil pump is driven off the crankshaft. Timing belt drives the camshaft and water pump - nothing to do with oil pressure.

Let me guess, 96+ Del Slo with the junk *** D16Y oil pump?
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Old 09-04-2006, 03:03 PM
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Default Re: did timing belt, spun rod bearing

how can y pumps suck that bad? My motor has like 100k on it and i've never had a problem with it
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Old 09-04-2006, 03:26 PM
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Default Re: did timing belt, spun rod bearing

well, I had a set of Y-series bearings laying around, amazingly one of them plasti-gauged w/in spec, so I replaced the #1 rod bearing. Started it up, and it was quiet for about 30 seconds then it started knocking again. The rod looked fine, and the journal looked fine.

The old bearing is ground down on the cap side, and the rod side has a dimple about 1mm in diameter right in the middle of the journal surface.

The car was fine before, I drove it from his house to my house. He hasn't even seen the car since I left, so yeah...wtf do I do now? I figure I'll offer to install an engine for free, but I only have a couple OBD0 engines around, nothing with the knock sensor stuff he will need.

Oh, and yeah, it's a 96 Del Sol w/ the shitty Y-series oil pump.
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Old 09-04-2006, 03:35 PM
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Default Re: did timing belt, spun rod bearing

damn that sucks .. i hate doing free work when its not your fault but i do it and im sure there is people on here who do it also .. helps with repeat customers ..
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Old 09-04-2006, 03:52 PM
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Default Re: did timing belt, spun rod bearing

um knock can be relocated to many areas of the engine to keep it happy
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Old 09-04-2006, 03:54 PM
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Default Re: did timing belt, spun rod bearing

Originally Posted by chris
um knock can be relocated to many areas of the engine to keep it happy
huh?
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Old 09-04-2006, 03:57 PM
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Default Re: did timing belt, spun rod bearing

Originally Posted by krustindumm
huh?
i loved you in Above the Law
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