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engine swaps - 4500, 4900, 4100 engines

calling in anyone that knows, or had done it or has even attempted it ..

regardless of car model, are the 4500, 4900, 4100 engines
interchangeable?

do the transmissions bolt on between the various
engines?

are the engine mounts on the blocks interchangeable?

will the EMISSIONS packages run into trouble?
 

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'98 Buick Regal LS - '91 Caddy Seville - '87 Caddy Seville!
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engine swaps - 4500, 4900, 4100 engines

calling in anyone that knows, or had done it or has even attempted it ..

regardless of car model, are the 4500, 4900, 4100 engines
interchangeable?

do the transmissions bolt on between the various
engines?

are the engine mounts on the blocks interchangeable?

will the EMISSIONS packages run into trouble?
If front wheel drive models, yes, yes, yes, and yes.
 

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1990 Deville Sedan
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The transmission is 4t60 for 1990 and earlier. 1991 and later is the 4t60-E. So in other words, the 4.9L engines have a 4t60-E.

I have read that the 4t60 can be used on the 4.9L engines, but the 4t60-E cannot be used on the 4.5L and earlier engines (or something along the lines of that) because the transmission is electronically controlled. This would be something to look into.
 

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'98 Buick Regal LS - '91 Caddy Seville - '87 Caddy Seville!
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4,425 Posts
The transmission is 4t60 for 1990 and earlier. 1991 and later is the 4t60-E. So in other words, the 4.9L engines have a 4t60-E.

I have read that the 4t60 can be used on the 4.9L engines, but the 4t60-E cannot be used on the 4.5L and earlier engines (or something along the lines of that) because the transmission is electronically controlled. This would be something to look into.
In a nutshell, you're right.

The object with these engine swaps is to go from the smaller sized engine, like a 4.1 liter to the next step up, as in the 4.5 liter. The tranaxles, even though they will physically interchange, will not work with one ECM to the next.

For example, you can't just hook a 4T60-E to a 4.5 liter powered car/ECM and expect it to work, because it simply won't unless you swap ECM's; though feesible, it's not really time or cost effective, especially for a novice.

As for using a 4.9 liter engine in a 4.5 liter powered car (particularly the TBI [throttle body injection] models), care, and I mean serious care must be used.

For example, you cannot interchange the TBI intake with the MPFI (multi-port fuel injection) 4.9 liter heads without serious problems. You would essentially have to use the 4.9 liter short-block and the 4.5 TBI heads and intake.
 
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