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I don't believe there is any other engine that you can use, that would make sense. Head gaskets are not usually a problem on this engine, the cylinder sleeve o-rings are.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I don't believe there is any other engine that you can use, that would make sense. Head gaskets are not usually a problem on this engine, the cylinder sleeve o-rings are.

when i bought this car the car had overheated and they sold it to me thinking the motor was stuck for $500, i would like to fix the motor i have but it is too costly for my wallet so i thought it would be cheaper to replace it with another , so does that mean the 4.1 and the 4.5 will not interchange with the 4.9?

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Replacing it with a 4.1 or 4.5 would be foolish, they are predecessors to the 4.9 and in my opinion and not to offend anyone inferior. Replace it with a 4.9

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Does the engine turn over and run? You might not need to replace the engine at all.

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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Does the engine turn over and run? You might not need to replace the engine at all.

yes the engine runs but i can smell the antifreeze and can see the slight white exhaust smoke from the exhaust, so i pretty well know it is the head gasket. i know a guy that spent 3000 on the rebuild and he has a 4.5 liter , i was wondering if that would swap with mine without too much effort or is the 4.9 the only fit , noone has really answered that question.

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Technically the 4.5L will fit. The issue may be with the engine computer / electronics and tie to the dash. Once Cadillac went to the 4.9L they replaced the 4.5L. But since both are OBD I you may find that it is plug and play. However, you may not.

Bruce

2016 Cadillac ATS-V gray/black

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Technically the 4.5L will fit. The issue may be with the engine computer / electronics and tie to the dash. Once Cadillac went to the 4.9L they replaced the 4.5L. But since both are OBD I you may find that it is plug and play. However, you may not.

thanks that put me alot closer to a decision and as one last request would you know what models and corresponding years would fit my seville

Paul

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The "L26" 4.9L started in 1991 and ran until 1995 in some non-sport models. It was used across the line in Sevilles, Devilles, and Eldorados in 1991 and 1992, and in base models in 1993-1995.

Bruce

2016 Cadillac ATS-V gray/black

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The "L26" 4.9L started in 1991 and ran until 1995 in some non-sport models. It was used across the line in Sevilles, Devilles, and Eldorados in 1991 and 1992, and in base models in 1993-1995.

just found a 95 deville with a good 4.9 would the motor just bolt in with no extra work and would the computer be compatible looks like i have this beat if it will

Paul

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The "L26" 4.9L started in 1991 and ran until 1995 in some non-sport models. It was used across the line in Sevilles, Devilles, and Eldorados in 1991 and 1992, and in base models in 1993-1995.

just found a 95 deville with a good 4.9 would the motor just bolt in with no extra work and would the computer be compatible looks like i have this beat if it will

Paul

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I would plan to use the original computer that came with the car, but it should run the 'new' 4.9L. I am sure you will run into something(s) that changed, but your engine swapper should handle.

Bruce

2016 Cadillac ATS-V gray/black

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