HT4100 sucks. What do I do?
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Joined: Oct 2008
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HT4100 sucks. What do I do?
Ok, so anyone with any mechanical aptitude that's owned a mid-80's caddy knows that the HT4100 is a money pit. Mine is no exception, though it hasn't (completely) failed me yet.
And I stress YET.
But rather than rebuild a substandard engine such as the one in my 1985 Eldorado, what other options do I have?
I'm planning on making this a project car, and retiring it as my daly driver, at least until the spring.
One option would be to find a used 4100, strip it down to the block andgo from there (aluminum heads being the key change). But apparently mine is the only one in a 200 mile radius, and S&H would make up the diffence in cost if I were to buy a reman.
What I'd like to do is build an engine from the block up, but starting from a more powerful, more fuel efficient template than the stock for my model year. But I don't know what kind of engine would be compatible with the rest of my drivetrain.
Is that possible? Is there something like a big block V6 that would fit and function properly in my vehicle? Would the mounting bolt patterns effect which engine I can get or are there conversion kits available?What problems am I likely to run into with a project like this? How much could I end up spending and where can I save a few bucks without endangering a successful outcome?
I'm still a novice when it comes to this stuff, so any guidance, suggestion, tips, ridicule or otherwise is greatly appreciated.
Thanks!
And I stress YET.
But rather than rebuild a substandard engine such as the one in my 1985 Eldorado, what other options do I have?
I'm planning on making this a project car, and retiring it as my daly driver, at least until the spring.
One option would be to find a used 4100, strip it down to the block andgo from there (aluminum heads being the key change). But apparently mine is the only one in a 200 mile radius, and S&H would make up the diffence in cost if I were to buy a reman.
What I'd like to do is build an engine from the block up, but starting from a more powerful, more fuel efficient template than the stock for my model year. But I don't know what kind of engine would be compatible with the rest of my drivetrain.
Is that possible? Is there something like a big block V6 that would fit and function properly in my vehicle? Would the mounting bolt patterns effect which engine I can get or are there conversion kits available?What problems am I likely to run into with a project like this? How much could I end up spending and where can I save a few bucks without endangering a successful outcome?
I'm still a novice when it comes to this stuff, so any guidance, suggestion, tips, ridicule or otherwise is greatly appreciated.
Thanks!
Super Moderator
Joined: Dec 2006
Posts: 1,461
From: Toronto, CANADA
RE: HT4100 sucks. What do I do?
What year is the car, seems to me is it is not a downsized car you have the Olds 307, 350 or even 403 or Cadillac 368 or 425 as choices. If downsized you are stuck with 4.5 or 4.9 Cadillac.
Junior Member
Joined: Nov 2014
Posts: 1
ht 4100 replacement idea
I ran my ht4100 in 1984 caddy paris devile limo for 10 years...all of a sudden threw a rod...whats to do? well guess what...I dropped a 1990 4 barrel carb 350 chevy big block in my 1984 caddy deville...will need to modify over the powerstering..altinator..manifold from a 1980 throw out the 1990 manifold so you can go all carborator..and you will a chevy 350 starter...transmissions bolt rigtht up no problem with the hydramtic 2100...altogether I spent about $600 covereting over my ht4100 to a chevy 350 got rid of the dfi and went carb...oldsmobille is also capatible with caddillic..but ive never messed around with oldsmobile cuz parts are more difficult to find
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