Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

After plenty of time under the hood, feel that maybe it is time to rebuild/swap.

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Old Dec 13, 2010 | 05:11 PM
  #1  
Mr Froman's Avatar
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From: DE
Car: 1990 Firebird Formula
Engine: LB9 - 5.0 TPI
Transmission: 700R4
Axle/Gears: 2.73, LSD
After plenty of time under the hood, feel that maybe it is time to rebuild/swap.

I bought the car used, 165K from the previous owner(s). Car was in pretty decent shape but it does have a few issues with the idle, runs horribly unless hot and at this point it stalls when it reaches operating temp. I don't have another vehicle so my only option is to buy my sisters Cobalt which she left behind with $8,500 worth of payments left when she moved to Sicily last week. Or get this one fixed which is completely breaking our ***** at this point, mine especially because I will rely on it again for work and college once someone else buys the Cobalt.

Budget is a few grand, wanted to see what I'd be looking at as far as $ for a rebuild on a 305. Thanks.
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Old Dec 14, 2010 | 01:03 PM
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Nothing you describe would necessarily be resolved by a rebuild or swap.

Find out what's wrong first.
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Old Dec 14, 2010 | 04:23 PM
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From: NC
Car: 91 Trans Am
Re: After plenty of time under the hood, feel that maybe it is time to rebuild/swap.



Also, never overlook the fact another 3rd gen can be had for under $2k pretty easily road ready
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Old Dec 14, 2010 | 07:45 PM
  #4  
Mr Froman's Avatar
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From: DE
Car: 1990 Firebird Formula
Engine: LB9 - 5.0 TPI
Transmission: 700R4
Axle/Gears: 2.73, LSD
Re: After plenty of time under the hood, feel that maybe it is time to rebuild/swap.

Didn't feel like getting into a long description on why I am considering it, was really just looking for an idea on how much I'd spend.
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Old Dec 15, 2010 | 12:58 PM
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five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Well, it depends on what level of rebuild is required. A simple ring and bearing replace could be done for a few hundred. Add boring the block, turning the crank, valve job, you're probably looking at around $1000. If the valve guides are shot, add another couple hundred. Other little things like valve springs, rockers, pushrods, will push it up some more.

This guy http://www.precisionengine.com/rebui...gmc/index.html sells a rebuilt roller lifter 305 for $1300 (plus freight, of course). I've never done business with them, nor know anyone who has, but that's about a typical price for a rebuilt engine.
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Old Dec 15, 2010 | 03:45 PM
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Posts: 611
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From: DE
Car: 1990 Firebird Formula
Engine: LB9 - 5.0 TPI
Transmission: 700R4
Axle/Gears: 2.73, LSD
Re: After plenty of time under the hood, feel that maybe it is time to rebuild/swap.

Okay thank you. Dead on answer.
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