motor swap 94 bonneville - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-10-2006, 11:31 AM   #1
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Default motor swap 94 bonneville

HI guy'*,new to your forum,brows thru it you guy'* are good at helping people out.Wonder if you could help me out .My dad has 94 bonneville motor blew (crank)found 93 bonneville wonder if can do switch over with no modification they're not supercharge also if you could let me know how big of a job it is to take out .If you could let me know were motor support are and quit tips to make job easier like do i take out tranny with motor or is it easier to leave in not shure if it comes out anyway might need to take out from under of car.

thank you in advance i would appreciate any input
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Old 11-10-2006, 11:37 AM   #2
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the 93 should be a direct fit.

Tips.
Pull out through the top, leave trans in the car.
Your motor is held in by the trans to engine bolts (1 is opposing and is only gotten from passenger side with tire off) and the engine mount at the passenger side that you see by the belts. (called the torque axis mount)

The wiring isn't bad, I usually pull the fuel rail out of the intake and flop it up onto the windshield area.

Timewise.. that depends on you and tools. I've got air tools and did it before.. say about 7 hours from start to finish. Hand tools can take longer.
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Old 11-10-2006, 01:43 PM   #3
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Quote:
Originally Posted by BillBoost37
the 93 should be a direct fit.
the only thing you have to change off the motor is the EGR valve....they differ from 93 to 94
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Old 11-10-2006, 01:48 PM   #4
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Didn't the 94/95 motor switch to the 3 wire O2? Or is that irrelevant in a total swap?
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Old 11-10-2006, 01:52 PM   #5
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Quote:
Originally Posted by Mortehl
Didn't the 94/95 motor switch to the 3 wire O2? Or is that irrelevant in a total swap?
Irrelevant. That can be changed at the manifold.
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Old 11-10-2006, 01:57 PM   #6
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Quote:
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Quote:
Originally Posted by Mortehl
Didn't the 94/95 motor switch to the 3 wire O2? Or is that irrelevant in a total swap?
Irrelevant. That can be changed at the manifold.
Right....

The 93 L27 had a 3 wire heated... The 94-95 L27( 94 in the bonnevilles, 95 for other Makes ) Had the 4 wire heated..

Easily swapped out for the correct one for the car

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Old 11-10-2006, 06:26 PM   #7
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THANK YOU GUY'* QICK RESPONSE APPRECIATE IT.I DO SWAP LET YOU KNOW HOW IT GOES.
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Old 11-10-2006, 06:40 PM   #8
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When you do the swap, it would be wise for you to replace sensors and gaskets that are normally not easily accessable. Do the oil pressure sender, and do a new oil pan gasket, as well as lower intake. And, for the love of Jinx, please make sure your donor engine will do several revolutions by hand BEFORE you put it in. It'* amazing what carbon in the chambers can do, esp. if the engine had a rough transit to its new home.
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Old 11-10-2006, 08:59 PM   #9
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Quote:
Originally Posted by sandrock
When you do the swap, it would be wise for you to replace sensors and gaskets that are normally not easily accessable. Do the oil pressure sender, and do a new oil pan gasket, as well as lower intake. And, for the love of Jinx, please make sure your donor engine will do several revolutions by hand BEFORE you put it in. It'* amazing what carbon in the chambers can do, esp. if the engine had a rough transit to its new home.
Honestly Brad.. I wouldn't put a sensor or gasket on a motor until it'* running. The oil pressure sensor is a cake walk to get at from the passenger wheel well.
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