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92 eldorado engine change


Gyounker

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I had to replace the basic 4.9 engine in my 1992 Eldorado due to a bad thermostat. The only engine available was from a touring car. I will be getting the car back tomorrow and can't find if the new touring engine has more base HP. Also, the new engine has a documented 53,713 miles. What is the HP increase for the 92 touring engine? Thanks in advance

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No difference at all in the engines all 4.9's were the same...200 hp..

http://en.wikipedia.org/wiki/Cadillac_Seville

Pre-1995 - DTC codes OBD1  >>

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

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No wonder I could only find a reference to the 200HP.

My mechanic called and told me he had to put on my old exhaust manifold because the wiring harness leads for the ETC did not match for my non- ETC car. He also felt the tour package engine had a difference in the cam/valve sizes to give improved performance.

Was the ETC package mostly in the car cosmetics?

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Not surprising, the standard seville and eldo in 1991 had single exhaust whereas the 1992 STS and ETC had dual exhaust...you may have gotten an engine that had single exhaust. FYI, the exhaust manifolds on the 4.9 are prone to cracking so if he was able to transfer them without cracking them you were lucky.

I think the ETC/STS had a beefier suspension and slightly different body cosmetics.. the final drive ratio might be slightly different also, you need to check that

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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Yes, the final drive ratio was different in the touring package, so the computer (PCM) may give an error code if you don't keep the PCM and final drive matched. As I recall, 2.97:1 in the base and 3.31:1 in the touring; not a huge difference but does give better acceleration.

Bruce

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Yes, my 92 does have a single exhaust. My 98 Eldorado has a dual exhaust. Well, I can only hope the mechanic doing the work knows his cars. He did explain a lot to me up-front so I think he is OK. The company that supplied the motor uses him a lot to install engines.

If my manifold did get cracked, I wonder if it would be cheaper to put the ETC manifold back on and make it into dual exhausts. It would improve the breathing a lot.

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I know the 98 has a Northstar engine because I was amazed at how well engineered it is and all it can do. If my 4.9 was as good I would not have lost the motor like I did the 92. I can't wait to get my 92 back and check it out. It had over 160,000 miles and running good until a $10.00 thermostat went bad and I lost all the anti freeze. I am also getting the trans filter and fluid changed and keeping my fingers crossed.

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Yes, my 92 does have a single exhaust. My 98 Eldorado has a dual exhaust. Well, I can only hope the mechanic doing the work knows his cars. He did explain a lot to me up-front so I think he is OK. The company that supplied the motor uses him a lot to install engines.

If my manifold did get cracked, I wonder if it would be cheaper to put the ETC manifold back on and make it into dual exhausts. It would improve the breathing a lot.

Save those manifolds if you they are from an STS, they may have been for dual exhausts....you will notice casting numbers on them that a cadillac dealer may be able to identify for you....

There is NO difference in ANY 4.9 they are ALL the same, cams, valves, etc.... NO DIFFERENCES... On the NS, the CAM is different on the 300 HP STS/ETC when compared to the standard 275 HP engine.... You have a 4.9, they were exactly the same from 91 through 95.....

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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