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Common problems with 1991 5.7 liter engines

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Old Jul 26, 2005 | 12:03 PM
  #1  
Stratocaster's Avatar
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Car: 1992 Z28
Engine: 305 TPI
Transmission: 700 R4
Common problems with 1991 5.7 liter engines

Hello, I used to own a 1987 Camaro. I'm thinking about getting another one and I'm leaning more towards a 1991-92 Z-28. I found a 1991 Z-28 with a 5.7 liter with 155,000 miles on it for $3,900. I haven't seen the car in person, just in pictures, but the body looks to be in really good shape. My question is, what kind of problems are common with the 5.7 liter engines with that many miles? What about any other non engine problems? I would hate to get the car and wind up with a lot of problems on my hands. Assuming the body is in good shape does $3,900 sound like a good deal?
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Old Jul 26, 2005 | 06:07 PM
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From: Frankfort, KY
Car: 81 Corvette
Engine: 355, ported vortec heads
Transmission: 700r4
I would say the rear main seal is an aggrivating one. Granted, my 91 is a 305 but that was the first thing that really went. Damn thing smoked like a freight train from all the oil hitt the y-pipe. I
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Old Jul 26, 2005 | 06:49 PM
  #3  
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From: San Diego, CA
Car: 87 Buick GN
Engine: 3.8L (231 cid) V6
Transmission: 200-4R
Axle/Gears: 10 bolt G80/ 3.42
If the heads haven't been touched I'd say the valve guide seals.
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Old Jul 26, 2005 | 07:06 PM
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From: Frankfort, KY
Car: 81 Corvette
Engine: 355, ported vortec heads
Transmission: 700r4
Yeah, I had that problem too. But that one piece rear main blew wide open. It was either park it, or fix it. So I fixed it with a 350

Not to mention they are harder to replace than the 2 piece.
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Old Jul 27, 2005 | 12:15 AM
  #5  
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From: waco, tx
Car: 91Z28 L98
Engine: HSR 350
Transmission: Goebel 700R4
Gauges quit working (correctly). If you do a search, you'll find that it is very common for the tach to be broken, actually it reads several thousand rpm off. And unfortunately, the gauge cluster is one piece. Oh yea, my temp gauge is also 20* off.
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Old Jul 27, 2005 | 09:22 AM
  #6  
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From: KY
multec injectors = junk throw them out no questions asked

get some replacements off eBay cheap.
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