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Noob 3100 to LQ1 Swap questions. HELP PLEASE!!!!!!!


IfinishB4u

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Hi, I am new here but have been on clubgp for a while, although you guys seem to have more 3.4 owners over here so I thought you might be able to help a little more. I have a '95 GP SE with the 3100 and When I blew the intake gasket at 167k, I also spun 2 rod bearings. and the sludge of oil/coolant is everywhere in the motor. I was able to get my hands on a perfect RUNNING condition '92 cutlass 4-door with the 3.4 DOHC with 91k miles for only $200. I was wondering how difficult it is going to be to do this engine swap. Do I need to worry about putting my tranny on the older motor or does the '92 cutty have the 4t-60e? Also how about motor mounts, and wiring harnesses? Thank you very mch in advance, and I will be hanging around the board quite a bit now.

 

-Nick-

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You will need the harness and computer from the LQ1 im pretty sure on that one. the 92 should have the 4t60e, but i think you will still need the harness from the LQ1? I am guessing new motor mounts and the dogbone for the LQ1 also. I have gained all this info from this site, if I am wrong correct me. please.

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IfinishB4u, welcome!

An OBDI DOHC swap from a OBDII 3100 SFI is going to be a bit more chanelleging since you're reversing the process.

However, if you're determined, you'll need to swap the entire powertrain (engine / tranny).

Along with all the ECM and the donor wiring from the DOHC; you'll need to integrate it into your existing components.

Also, you still may need to swap out the entire sub-frame; that's something to do research on.

Do-able? Yes. Practicle? Probably not.

You may have better chances getting the DOHC running in better status in the Cutlass.

Just my personal input; take on what you can do!

 

- Erik

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yes....it would, as i have heard. I personally plan to take that route when this engine goes....rather than the DOHC or the boat L67. While i want the 3.8 s/c...it just seems like to much work, and id rather just buy the dang GTP

 

jon

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IfinishB4u, welcome!

An OBDI DOHC swap from a OBDII 3100 SFI is going to be a bit more chanelleging since you're reversing the process.

However, if you're determined, you'll need to swap the entire powertrain (engine / tranny).

Along with all the ECM and the donor wiring from the DOHC; you'll need to integrate it into your existing components.

Also, you still may need to swap out the entire sub-frame; that's something to do research on.

Do-able? Yes. Practicle? Probably not.

You may have better chances getting the DOHC running in better status in the Cutlass.

Just my personal input; take on what you can do!

 

- Erik

 

not trying to budge in...but a '95 3100 is still OBDI

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