looking for a good 4100 mechanic
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HT4100 4.1, 4.5, 4.9 Discussion, looking for a good 4100 mechanic in Cadillac Engine Technical Discussion; My '84 Eldorado blew a head gasket Sunday. Does anyone know a good 4100 mechanic in the Dallas/Ft. Worth area? ...
  1. #1
    Bob Tarpenning is offline Cadillac Owners Member
    Automobile(s): 1984 Eldorado Barritz Conv
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    looking for a good 4100 mechanic

    My '84 Eldorado blew a head gasket Sunday. Does anyone know a good 4100 mechanic in the Dallas/Ft. Worth area? Will a 4.5 or a 4.9 engine enterchange with a 4.1 in an Eldorado?
    Bob T

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    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: looking for a good 4100 mechanic

    Does anyone know a good 4100 mechanic in the Dallas/Ft. Worth area?
    Nothing special about the 4100. Any decent mechanic can do it. Hell, I did one in my garage many years ago. Not sure if you can swap in a 4.9, but if you find that you can, go for it. It's 10 times better than the 4100.

  4. #3
    ehall's Avatar
    ehall is offline Cadillac Owners Connoisseur
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    Re: looking for a good 4100 mechanic

    I don't think the transverse engines will mount in the RWD chassis but I don't know for sure. If I had a RWD Cadillac that I wanted to keep on the road, I'd swap in a Chevy 350 anyway (maybe even something better--sky is the limit on RWD)

  5. #4
    Stingroo's Avatar
    Stingroo is offline Wagon/Audio Enthusiast
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    Re: looking for a good 4100 mechanic

    Check out the RWD forum for inspiration. Greencadillacmatt is finishing up his HT4100 to Olds 350 swap now.

  6. #5
    carnut is offline Cadillac Owners Master
    Automobile(s): 1988 Allante' (sold), 1984 Eldorado, 84 Sedan DeVille
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    Re: looking for a good 4100 mechanic

    First off, this is a front wheel drive car and the engine faces forward. The block design will not allow a 4.5 replacement or later. Have we got water in a cylinder , steam from the exhaust? If not, I would suspect an intake gasket rather than head. Depending on how long the coolant leaked into the engine it could be as simple as an intake gasket replacement or as serious as a worn out camshaft which usually dictates an engine. I've heard some rebuilders offer that block with 4.5 cyl liners allowing you to update. That engine casting is specific to Eldorado and rear wheel drive Fleetwoods.

  7. #6
    Bob Tarpenning is offline Cadillac Owners Member
    Automobile(s): 1984 Eldorado Barritz Conv
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    Cleburne, TX
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    Thread Starter

    Re: looking for a good 4100 mechanic

    Thanks for the feedback, guys. I've changed the head gasket on a crossways 4100 in a Deville coupe about 15 years ago. Had to do it twice because I used a cheap head gasket the first time. I forgot what it was or what I used the second time. What is the best? I'm 76 now and not really anxious to do it again. I have exhaust gas in the overflow tank so I'm pretty sure it's a head gasket. It is missing on one cylinder also. I started it yesterday and it didn't seem to have water in the cylinder (no water in the exhaust). I'm putting a 4.3L V6 in my '48 Hudson now so it will be a while before I can work on the Eldorado and I'd like to be able to take on a tour in August. That's why I'm looking for a good mechanic near by.

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