Chevy 3.8L in a CJ7? - JeepForum.com

 
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post #1 of 7 Old 09-10-2001, 12:00 AM Thread Starter
StevieC
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Chevy 3.8L in a CJ7?

Hello everyone-

I have a unique situation, was wondering if you folks could help me determine feasibility.
I have access to a late 70's CJ7, with everything but the engine, in decent shape. I also have a
1988 Olds Toronado with a V-6, 3.8 L engine which is also in great shape.

Is it possible within reason to place this engine in the Jeep?

I appreciate any input anyone can provide. I'm not terribly engine savvy, but I have a pal who is a
whiz- thought I'd see if he would be willing to help me out. Wanted to ask you all first.

Thanks!

Steve
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post #2 of 7 Old 09-10-2001, 08:43 AM
Kev
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My uncle put a GM V-6 (I forget the size) in his '55 Willy's Jeep by himself without too much trouble (he did have to move the steering box and get some adapters). Sorry I don't really remember what was involved it was years ago and I didn't help much, but it is possible. I wouldn't think that a CJ7 would be any more difficult than a Willy's, but I'm no expert.

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post #3 of 7 Old 09-10-2001, 04:54 PM
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If you are planning on using the stock tranny and related goodies, I would contact the good people at Advance Adapters and see what they have available.

I am sure if you can get the bell housing to mate up and the output shaft to hook up, it could be done. You might need to make your own engine mounts and such, but if you are handy with fabrication tools, it wouldn't be too bad.

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post #4 of 7 Old 09-11-2001, 02:00 PM
fuelin
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correct me if im wrong but the 3.8 fwd engine has a different trans bolt pattern then the rwd so you will be unable to get a trans for a rwd application w/o making your own adapter.
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post #5 of 7 Old 09-11-2001, 10:41 PM
NaeKid
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An '88 Olds Toronado is front wheel drive????

IF that's true, then forget what I said earlier .. it won't work ..

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post #6 of 7 Old 09-12-2001, 11:58 PM
Nightclaw
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Hang on here for just a sec'. The bell housing bolt pattern on the Buick 3.8L (even though it came out of an Olds, it's a Buick engine) is common to all late-model GM engines. The difference in FWD vs. RWD is the actual bell housing used, possible tranny input shaft spline count difference, and the exhaust system.

Even though the V6 you're talking about is an '88, the fact of the matter is that GM bell housing bolt patterns are identical for all V6 and V8 engines. Don't believe me? Check it out for yourself at your friendly neighborhood junkyard.

In any case, you should be able to find the correct adapter. Worst case (best case?), you may need to get a bell housing, flywheel, starter, etc. from a '95+ Camaro.

Which, incidentally, should have a trans-side bolt pattern to match up with a Borg Warner T-5 or similar... Could be wrong on this last bit, but Adv. Adapters should be able to adapt the Chevy bell housing to at least one other transmission.

Engine swaps are full of "gotcha's", but you should be able to make that 3.8L work with a little creativity. Good luck!

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post #7 of 7 Old 09-13-2001, 11:38 PM
fuelin
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i have swapped many 3.8 engines and trannys as i was a mechanic at a buick dealership and i am pretty sure those trannys do not have removable bellhousings...so an adapter is needed and i am also pretty sure that the 3.8 fwd has a different pattern than the 3.8 gran national engine....kinda like how the 700r4 tranny in this era of the late 80's at least had different engine bolt patterns for the v8s and 6 cyls...
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