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| New motor (Page 1/2) |
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habendanio
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NOV 09, 04:26 PM
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I have an 86GT that motor just went bad. Sounds like a bad bearing but can see an indent where the cylinder head hit a spark plug. What’s should I do. The engine is going to need to be rebuilt or replaced. Anywhere in Northern California capable of doing this kind of work?
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Patrick
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NOV 09, 05:06 PM
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| quote | Originally posted by habendanio:
...the cylinder head hit a spark plug.
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...
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Spoon
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NOV 10, 06:49 PM
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| quote | Originally posted by Patrick:
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Head hitting a spark plug would be a first in any engine.. Take another look or better yet post a pick. I wouldnt want to miss this for the world.
Spoon
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"Kilgore Trout once wrote a short story which was a dialogue between two pieces of yeast. They were discussing the possible purposes of life as they ate sugar and suffocated in their own excrement. Because of their limited intelligence, they never came close to guessing that they were making champagne." - Kurt Vonnegut
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skywurz
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NOV 10, 08:36 PM
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| quote | Originally posted by habendanio:
I have an 86GT that motor just went bad. Sounds like a bad bearing but can see an indent where the cylinder head hit a spark plug. What’s should I do. The engine is going to need to be rebuilt or replaced. Anywhere in Northern California capable of doing this kind of work? |
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An 88 gt just hit our pick n pull.
I have an 88 engine that's complete not far from you that you can just have if you want. I had pulled it apart to sell as a good short block but ended up buying the car instead of selling him the engine. I ended throwing the engine back together for storage. It probably needs the heads serviced at a minimum and will need new head gaskets intake as I had the heads off. Basically all new top end gaskets.
If you are interested let me know.
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Rickady88GT
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NOV 10, 10:10 PM
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| quote | Originally posted by habendanio:
I have an 86GT that motor just went bad. Sounds like a bad bearing but can see an indent where the cylinder head hit a spark plug. What’s should I do. The engine is going to need to be rebuilt or replaced. Anywhere in Northern California capable of doing this kind of work? |
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Ok, I just wanted to be clear for the rest of the crowd: the piston hit the spark plug. Why?
Yes the engine obviously needs a rebuild. The question is how to rebuild it? Or in other words, should it be rebuilt for performance or stock replacement?
Is this correct?
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jelly2m8
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NOV 11, 02:05 AM
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To be fair, if one cannot understand the difference between a cylinder head an a piston, perhaps they should not attempt an engine replacement. just sayin.............
And if you have a 2.8 that the piston smacked the spark plug, that's some kind of special. perhaps the wrong plug? the long reach?[This message has been edited by jelly2m8 (edited 11-11-2023).]
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PhatMax
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NOV 11, 07:02 AM
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It would be awfully hard to hit the plug unless it was too long to begin with. Is the electrode bent over or mangled ? Did you scope the bore ?
Most will tell you swap to a bigger motor. Full rebuild for a 2.8 is about $2400… how many miles are on it ?
You can only go to a slightly more performance cam without opening another can of worms…..unless you have deep pockets….lots of other changes have to happen then like computer change, prob lifters…etc. at that point swap to a bigger motor..[This message has been edited by PhatMax (edited 11-11-2023).]
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skywurz
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NOV 11, 11:57 AM
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Since we are sharing our wild assumptions.
My assumption is OP has the engine apart to see the top of the piston.
Typedoed had to head.
The piston has let loose is some way from the rod and or crank and the valve made the mark.
 [This message has been edited by skywurz (edited 11-11-2023).]
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Patrick
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NOV 11, 05:43 PM
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| quote | Originally posted by skywurz:
Typedoed had to head.
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Okay, I'm getting even more confused here. 
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82-T/A [At Work]
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NOV 11, 10:52 PM
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| quote | Originally posted by habendanio:
I have an 86GT that motor just went bad. Sounds like a bad bearing but can see an indent where the cylinder head hit a spark plug. What’s should I do. The engine is going to need to be rebuilt or replaced. Anywhere in Northern California capable of doing this kind of work? |
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Pretty much any reputable shop should be able to do it... but my recommendation is that if you're going to go through the effort, then you should consider just buying a 3.4 crate motor and dropping it in to replace your 2.8. You can re-use basically everything on the car, just requires a couple of additional parts...
1 - Rodney Dickman 3.4 Kit (~$95, two things...)
- https://rodneydickman.com/p....php?products_id=194
- https://rodneydickman.com/p....php?products_id=193
2 - Neutral-balanced Flywheel or flexplate (~$150)
3 - 17lb Fuel Injectors ($350)
- https://www.summitracing.co...model/base/year/1995
4 - Completely rebuilt 3.4 GM V6/60 Crate Motor ($2,250)
- https://www.summitracing.co...l/firebird/year/1995
Total cost for install is usually abbout $1,500. So you're looking at a total of probably close to $4,000 for basically a brand new motor installed... and you'll have more power and torque.
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