1983 Cadillac Eldorado Biaritz 4.1 V8 4.1 from North America


The best car we own.


I'm not sure how many others have had this problem, but, at about 93,000 miles my engine began to backfire through the manifold and the fuel injectors. I believe this was caused by the timing being off. I'm not sure if the timing has to do with that or not because this only happens at freeway speeds of 70+. If anyone knows or might have an idea of why this might be happening please let me know so I can take care of it. I also replaced the water pump at 87,000 miles with a brand new one. The major problem I have had is at 102,000 miles I had a wreck on a highway. Luckily not much damage came to the car. The front bumper and the right fender need replacement do to the damage. If anyone knows of a good place to find replacement parts I would be very pleased to know about it.

General Comments:

This car is one of the smoothest riding cars I have ever seen and driven. This is the ride to have. The gas mileage isn't too bad either. Right now I am averaging about 22mpg. The comfort of this car is unbelieveable. I myself have refrained from driving at night because I have found myself getting very tired from its comfort. I did make a modification to the stereo system in the car. The old stereo and speakers were worn out and needed replacement. I now have a Sony CD player with 4 2"/4" Sony speakers in the front and rear. I also have a 760watt Pioneer 2 channel amp powering 2 10" sub woofers. This car turns heads everywhere I drive, with or without the stereo. This is the coolest car we have.

Would you buy another car from this manufacturer? Don't Know

Review Date: 15th October, 2005

4th Jun 2007, 07:27

22 MPG on highway you mean?

11th Jun 2012, 23:53

The 4.1 V8 is a notoriously bad engine. Probably the worst engine GM ever built. The problem is that the coolant leaks into the engine oil and ruins the engine. Cadillac had a recall on this engine, and the fix was to put a sealer in the coolant water, thus sealing the engine gaskets. Check your oil carefully, and you will find it rises on the dipstick. Unfortunately, the water is filling your crankcase and causing bad readings on the dip stick.

7th Sep 2013, 13:31

I believe it is correct that the problematic 4.1 liter V-8 in this generation of Eldorado can be replaced (without too much modification) by the Oldsmobile 307 V-8. I know that this is possible to do in rear wheel drive Cadillacs burdened with the 4.1, and that Toronados and Rivieras of the same platform as the Cadillac came as standard with the 307. Can anyone confirm or dispute this?

1983 Cadillac Eldorado 4.1 V8 from North America


Possibly the coolest car you can own


The power steering pump broke suddenly, causing steering to malfunction at 102,000.

The alternator broke at 89,000.

It has had minor problems with rust, although I have fixed these with out too much effort.

Oil pan leaked and needed replacement.

General Comments:

This vehicle is very slow. According to an old issue of Car & Driver that I acquired, its zero-60 time is around 15 seconds. It's top speed is higher in 3rd gear than 4th, suggesting that the engine is very underpowered.

Fuel economy wasn't very good in my '83. I averaged only about 13 mpg, however, I have an '85 (which is virtually identical) which gets around 18, so I think the '83 had engine problems. I think the 18 is more typical.

The seats are excellent, and there is tons of room anywhere. It is the most comfortable vehicle I have ever driven or ridden in.

Visibility is good, however, the large pillars towards the back make large blind spots. This is only a problem when you are backing out of a parking spot, so its not all that bad.

The engine is difficult to work on. Just replacing the water pump requires removing most of the parts on the engine. So repairs aren't easy on this beast.

In general, it's a very fun car to own and drive.

Would you buy another car from this manufacturer? Yes

Review Date: 18th July, 2002

29th Mar 2003, 13:49

If you have the throttle body injection, you should be getting closer to 22 mpg. I have the same car with the 4.1 and combined mileage is always 21.9 or 22.2 I drive her gingerly and expect her to last since she made it this far (136,000 miles). The engine I tune myself here in the basement. I bring the distributor to my desk and install new cap, rotor and wires while I work and gap the new plugs, taking my time. You (or I) could eat off this engine, I keep it clean to find things easily if needed and self satisfaction. The 85 is a good car. I hope yours gives you the service mine has given me. Good luck!