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Old 04-12-2006, 06:54 PM
gomer's Avatar
gomer is offline
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Join Date: Sep 2005
Location: orlando
Posts: 346
Make: Chevrolet
Model: Cavalier Z24
Engine: 2.4
Spun bearing, rod knock

I think I may be needing a new motor ,,, I use my car for business and can't afford much downtime ... I'll know for sure this weekend but it sounds like a rod knock... oh well ,, got 30,000 out of a motor that was far enough gone I originally thought it'd never run again... If it is a spun bearing that lead to a failure would cleaning up the journal with 1500 grit and installing new rod bolts and a new bearing be a long term fix in your opinion or would it be best to swap out the motor? I run full synthetic oil and unfortunately had to drive the car about 80-100 miles after the apparent failure but the motor is still turning freely so I think the journal is worth inspecting..

My car/motor is a 97 2.4TC.. I need to know what is involved in an engine swap with a newer year motor,, more than likely if I find a low mileage yard motor it'll be 2000+ .. I understand there are some sensor differences... do I merely have to swap in the older type sensors and/or cut in new terminals on the harness or will this require a new 'puter that understands the sensors... also how to get around the egr/non-egr differences?

Everything fits with a welder.
Old 04-12-2006, 09:56 PM
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Join Date: Mar 2005
Location: Las Vegas
Posts: 925
Make: 1994 Pontiac
Model: Grand Am
Engine: Turbo Quad 4 HO
if it spun a bearing enough to still run and knock, the journal is screwed... too small to be turned down... even with a new bearing and bolts, it would be too worn down, and probably egg shaped.
1989 Toyota Supra - Turbo, Targa top, 5 speed
Grand Am is in the junkyard. I'm not leaving quad's for good tho...
Old 04-13-2006, 04:04 PM
gomer's Avatar
gomer is offline
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Join Date: Sep 2005
Location: orlando
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Make: Chevrolet
Model: Cavalier Z24
Engine: 2.4
Any insights on sensor differences?
Old 04-20-2006, 06:59 PM
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Join Date: Nov 2005
Location: Antigo, Wisconsin
Posts: 10
Make: 97
Model: Grand Am SE
Engine: 2.4 quad 4
the only diff should be the knock sensor and egr??......knock sensor is as easy as tapping out a blank boss on the block and installing it, but you will need the wiring.....
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bearing, knock, rod, spun

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