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#1
04-12-2009, 04:44 PM
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90 Caprice lower engine noise?
I have a 90 Caprice 9C1 police car with a 5.7L TBI and a nasty sounding noise coming from the lower rear of the oil pan. I removed the inspection cover thinking maybe the flex plate bolts were loose but the weren't. Since there's only fins or blades in the torque converter I'm thinking bearings. I'd like to get some opinions before I drop the pan so I recorded the sound with my cam and uploaded the video to you tube. If you have a sec please have a listen and let me know what you think. Thanks!
http://www.youtube.com/watch?v=dw0x81dADMQ 
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#2
04-13-2009, 03:39 AM
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Re: 90 Caprice lower engine noise?
Quote:
__________________
1988 9C1 - Modified LM1 @ 275HP/350TQ - TH700R4 - 3.08 8.5" Disc Rear - see it at http://www.silicon212.org/9c1! 2005 Crown Vic P71 - former AZ DPS - 4.6 liters of pure creamy slothness! 1967 El Camino L79/M20 old school asphalt raper Remember - a government that is strong enough to give you everything you need, is also strong enough to take everything you have.
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#3
04-14-2009, 03:52 PM
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Re: 90 Caprice lower engine noise?
That ain't opportunity knockin
 I also think it could be a cracked flex plate. I don't think you can see the bolts holding it onto the crank without moving the trans back a bit. I had one break completely around the bolts and it was easy to see with the inspection cover removed. Cheap enough part but a fair amount of labor involved. Trans does not have to be removed, just moved back a bit to gain access. Good Luck Al 
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1989 Caprice Classic Wagon, Olds 307 ,SMI Q-Jet, 200R4 w/Shift kit, Flowmaster 50, Hotchkiss sway bars, KYB Shocks. Jet Chip, 1989 Mustang LX 5.0 5sp convertible 1992 Camry LE 2.2 1996 Suzuki RMX250 I'm a victim of circumstance [ 
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#4
04-17-2009, 03:16 PM
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Re: 90 Caprice lower engine noise?
Ah! I'd much rather replace a flex plate then a rotating assy.! Exploratory surgery begins tomorrow! Thanks guys!
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1990 Caprice 9C1 TH700R4
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#5
04-18-2009, 07:23 PM
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Re: 90 Caprice lower engine noise?
Since the inspection cover is off, checking the flexplate is fairly easy, but I wouldn't put a lot of money on that being all the noise.
You'll have to unbolt the converter and slide it back to look at the center/hub area of the flexplate.
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