QuestionMy question is, what's the best route to take as I plan on replacing or rebuilding the engine in my 1984 Cadillac Eldorado? I would like to rebuild the motor but of course no one wants to deal with the troublesome 4100. Will a 350 chevy fit and what type of modifications must be done as well as pricing. Your thoughts will be greatly appreciated.
Thanks
Markell Coleman
AnswerHello,
What would be very sweet if you could find one is the 368 CI known as the 4-6-8- and grab the trans too. Bolt in cast iron. Fantastic engine! All you do is disconnect one wire and you are running on 8 cylinders. You also need the computer and harnesses.
As EPA is getting tougher and tougher, what happens if they decide to do emission checks on your car and they find out the Chevy is in there? If Obama stays, you can bet there will be no area EPA is not checking.
I don't know if the 350 will bolt to trans.
Oldsmobile 350 should be a bolt-in because they ran the olds diesel in them. Remember though, you are going to have harness issues and you need everything for it all the way down to the computer, so you are looking at a mid 80's rear wheel drive 88 or 98. 85 was the last year of the big ones. The 307 is a dog! (Y on VIN)
The 350 olds was also in the rear wheel drive Fleetwood Broughams and they went into the 90's.
You do devalue the car with these other engines sort of. 4100 if not over heated was not that bad of an engine. Some had the rist pin knock and piston slap, but they really weren't as bad as everyone said. The biggest problem was that people thought they could over heat it like they could a cast iron engine and learned the hard way that aluminum melts rather easily.
I had a 4100 that last 10,000 miles before putting a rod through the block, but covered under warranty. Then on the other hand I have had up to 200,000 miles on one.
The 368 is not great on mileage, but it is bullet proof. I think they started the 368 in 79, but I don't think they were fuel injected.
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