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| 1998 gpt 3800 ? (Page 1/1) |
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Ren1975
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DEC 08, 07:42 PM
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Hello guys. Just a simple it bin talked about. I’m just not sure really. I need a Little more guidance I guess I have read forms they say the 99 -04. Then 04 to present are the the best. I was thinking of a swap I have access to a 1998 gpt supercharge. Or a 2007 Gt. supercharge . Is one better than others. Newer models have trouble programming to fiero unless they can do it better now. Just not sure what car or if there a better year ? Thanks 🙏
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olejoedad
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DEC 08, 11:31 PM
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The better engine is the one with the lowest mileage.
They are easily controlled in a Fiero application.
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Ren1975
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DEC 09, 12:55 AM
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I was thinking of rebuilding the engine in either one of them before doing the swap
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olejoedad
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DEC 09, 12:14 PM
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| quote | Originally posted by Ren1975:
I was thinking of rebuilding the engine in either one of them before doing the swap |
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If you want to have bottom end problems, go for it.
If you don't want bottom end problems, leave it alone.
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richard in nc
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DEC 09, 02:31 PM
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| quote | Originally posted by olejoedad:
If you want to have bottom end problems, go for it.
If you don't want bottom end problems, leave it alone. |
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what ole dad is saying is a lot of people in here that rebuilt their 3800s had them go bad.that its best to just run them as is.
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Ren1975
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DEC 09, 09:55 PM
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Why do they have problems if you rebuild the motor. I thought it be better to do that then you know it a new engine and don’t have to worry about it. I just I was wrong.
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olejoedad
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DEC 10, 11:29 PM
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Rebuilding the rotating assembly on a 3800 isn't as easy as say, a SBC, an LS or a 60° V6.
The 90° V6 engine is inherently unbalanced. Anything out of tolerance and they beat themselves to death.
However, even high mileage 3800's hold up well to abuse.
Renew the oil pan, front cover/water pump, intake, supercharger and valve cover gaskets and call it good.
The intake gasket is known to fail and leak water into the oil - oil in the water has killed a lot of 3800 bottom ends.
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jelly2m8
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DEC 12, 05:06 AM
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Agreed to all above, not just for Fiero's, Google GM 3800 rebuilds and you will see that bottom end is a fickle ***** . Only go as far as head gaskets, replace all the seals and gaskets, it'll run good a Long GD time, probably longer than the majority will drive their Fiero.
Also, once you take that front cover off, be absolutely sure the oil pump primes afterwards, its not a hard process, take 5 minutes or less.[This message has been edited by jelly2m8 (edited 12-12-2023).]
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