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Old 04-12-2011, 09:29 PM
 
Location: So. of Rosarito, Baja, Mexico
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A little back info on my 2.8. The rear cyl on the left bank ( towards the firewall) was always running a little hot according to the spk plugs. I always had a feeling that the intake man was the main headache that caused the cyl to run lean...just a thought without proof.
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Old 04-16-2011, 11:45 AM
 
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Okay The truck am working on is a 85 s-10 The motor is from a 86 or 87 firebird It was a fuel injected motor. After changing parts used the 85 S-10 carburetor and harmonic balancer also th flywheel and clutsh setup. It had a terrible vibration so changed out the balancer for the one for the firebird it got better. So decided to change flywheel and ran into problems. Any suggestion to help solve problem would be a good thing
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Old 04-17-2011, 08:59 PM
 
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Quote:
Originally Posted by timh551 View Post
Okay The truck am working on is a 85 s-10 The motor is from a 86 or 87 firebird It was a fuel injected motor. After changing parts used the 85 S-10 carburetor and harmonic balancer also th flywheel and clutsh setup. It had a terrible vibration so changed out the balancer for the one for the firebird it got better. So decided to change flywheel and ran into problems. Any suggestion to help solve problem would be a good thing
also will a car 2.8 interchange with a 4x4 2.8?
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Old 04-18-2011, 03:40 PM
 
Location: Earth
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Originally Posted by timh551 View Post
also will a car 2.8 interchange with a 4x4 2.8?
I'm pretty sure they interchange.
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Old 04-18-2011, 06:43 PM
 
Location: Eastern Washington
13,388 posts, read 42,713,043 times
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Quote:
Originally Posted by Steve Bagu View Post
A little back info on my 2.8. The rear cyl on the left bank ( towards the firewall) was always running a little hot according to the spk plugs. I always had a feeling that the intake man was the main headache that caused the cyl to run lean...just a thought without proof.
As far as I know you are right, the 2.8 is not a good "even breather" and mixture distribution is not so good.

Edelbrock makes or at least made an improved intake for these, but unless the short block is in excellent shape, putting in a, I think it's a 4.3 V-6 that GM parts offers as an upgrade might be a better use of time and money.
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Old 04-19-2011, 08:20 AM
 
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Originally Posted by Deez Nuttz View Post
I'm pretty sure they interchange.
Any idea what have to do to interchange?
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Old 04-19-2011, 04:07 PM
 
Location: Wellsville, Glurt County
2,845 posts, read 8,921,469 times
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Quote:
Originally Posted by timh551 View Post
Okay The truck am working on is a 85 s-10 The motor is from a 86 or 87 firebird It was a fuel injected motor. After changing parts used the 85 S-10 carburetor and harmonic balancer also th flywheel and clutsh setup. It had a terrible vibration so changed out the balancer for the one for the firebird it got better. So decided to change flywheel and ran into problems. Any suggestion to help solve problem would be a good thing
OK, I gotcha... from the way you originally worded it I thought you left the EFI parts in place.

I would switch back to the clutch parts from the original S-10 transmission. I guess it's possible that the linkage or clutch fork is out of adjustment too, but the pressure plate doesn't have anything to do with balancing the engine and even if it's the same transmission between both vehicles (T5?) there may be some tiny differences that aren't apparent to the naked eye.

Have you checked the driveshaft(s) U-joints? That seems to be the most common vibration problem. I know you said there's a little shake when the motor is revved up standing still also, but that may just be that it doesn't run that good!!
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Old 04-19-2011, 05:22 PM
 
Location: Earth
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Originally Posted by timh551 View Post
Any idea what have to do to interchange?
To my understanding the 2.8 used in the F bodies is the same 2.8 used in the S-10's. The transversely mounted 2.8's out of a Citation I do not think will work in the S-10 or the F body.

I'm not real sure about the real differences between the 2.8 in the S-10 as opposed to the 2.8 in the F body. Your best bet would to be to hit up thirdgen.org and S-series.org and ask away.

Sorry I couldn't be of more help.
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Old 04-20-2011, 06:57 AM
 
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Thanks for the info, Think I will pull motor and install a flywheel
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Old 04-20-2011, 07:01 AM
 
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sorry meant crank
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