So What stuff will I need to do this swap??

Ive got this so far:

-L98 Engine(Intake to Oil Pan)
-L98 Motor mounts
-L98 Computer
-L98 Wiring Harness
-TH700R4 Transmission

What else am I gonna need??

Thanks

 

when I did my 2.8 I also needed the V8 radiator, hoses, all of the brackets for the v8, power steering high pressure line. Thats about all I can think of right off hand. There was a lot of little parts that I had to go and get. Im not sure how the fans are on your car, when I went with the V8 I had to change fan shrouds also. I'm not sure how the heater hoses are ran on the fuel injected cars, mine was carbd and I had to change the heater hose assembly too. Now would also be a good time to put some headers on, since everything is already apart. Bolts, bolts, bolts. You will need the bellhousing bolts to connect engine and tranny, most of the acc bolts, if you dont already have them, etc. Good luck, its worth it.

 

If the L98 is a complete running motor pullout, with the harness attached to it as it would have been in the previous car, all accessories in tact, you should only need to change the motor mounts, slightly bend the brake line going to the right front wheel since it will be in the way of the new mounts, and drop it right in, you'll of course need manifolds and Y pipe from a V8 car or a set of headers, your existing radiator will work, 90-92 V6 cars used a radiator that was the same as SOME of the V8 cars, dont let anyone tell you they are all the same, the V6 and sometimes V8 used radiator is a thinner core than the other version. Other than that the a/c lines will be different and you'd need a V8 set if keeping a/c, and if its to be a emissions legal swap you'd need all of the parts from a V8 car along with some 5/16 emission / fuel hose to go to the canister since on V6 cars its on the passenger side and V8 on drivers.

 

pretty sure you will need the new radiator. Beyong that there isnt too terrible much. I think you may need a new throttle cable. I think I read on another thread that the TPI V8 and mpfi V6 need different cables. Iknow that the V6 cable worked with my carb, but Idont know for your setup.

 

You could unbolt the power steering pump from the motor move it out of the way and bolt it to the v8. I THINK it will work. Im going to try it sat when i pull my 2.8 and replace it with my v8.
I needed to buy a new y pipe (autozone $80 lifetime warr)

The little stuff is what kills your pocket. Its surprizing as to how much it all adds up to.

BTW my v8 rad and v6 rad are the same size. Only diff is the hoeses are in diff places.

Trans mount, nuts and bolts, the mount that the tq arm goes in if you dont have it already.

 

im pretty sure that the Power steering brackets are different from v6 tp v8. I know mine were, however Iwent from serpentine to v belt.

 

i've heard that the radiators that came with 3.1's are the same as the ones that came with the V8's of the time....

 

I dont care how sure you are that he will need a new radiator, as i've already said, you are *drumroll* wrong !

brobert may be right with the ps pump, however im guessin you've got a complete serp setup so you shouldnt have to do that, and the statement about the throttle cable is correct they are different, make sure the 700R4 you got has a TPI tv cable if it didnt come with the motor.

 

I dont know anything about what fuel psi the V6 engines run at, but when I was going TBI to TPI, I know I was going to have to replace the fuel pump. The TBI ran at like 16-18psi or something, but the tpi runs 45-55 or something (not too sure, do a search for specs). I eventually ended up going carb (for other reasons), and got a fual pump specific for a carb'd setup. So find out what your pump pushes and if its not enough, be sure to upgrade. Another thing I would have had a problem with is the TPI fuel lines. There are hardlines from the fuel rail around the front to a bracket. At that bracket the hard lines can be disconnected in half (unscrewed). So make sure you have that fual hardline extension from that bracket to your rubber fuel lines in the engine bay right next to the steering box or else you might have to go on a search for those hardlines (they on ebay sometimes) or get some steel braided lines made.

 

MPFI V6 cars use the high pressure pump also.

 

If he has a mpfi V6 car, with the radiator fill on the drivers side, he WILL need a new radiator. My 1987 was, the 1990 that Me and my brother are parting right now is, and everyone I've looked at in the junkyard is too. I just got done with the 2.8 > V8 swap, and yes I most definately needed a new one. I wouldnt tell someone what they need for sure unless I knew for sure, how about you? Seems like everyone knows everything around here, what a joke.......

 

HOLY SH|T how thick headed are you people, in either 90 or 91 they changed the Radiator on the V6 cars, I dont care what your brothers uncles moms sisters sons cousins next door neighbor says, they redid it with a different set of hoses and they use the same placed outlets, since he said its a 3.1 chances are he's got the right deal, i know full well the early ones had a different radiator as I went through that oh only about 5 ? years ago when i put my Z28 radiator into my 89 RS 6 cyl car, some of you just need to learn when to shut up.

 

Calm down man, slow down on the coffee too. Its not that big of a deal.

 

Wow sweet, I learn something new from Z28r|cer every time I post about V6 cars. So the stock V6 fuel pump is powerfull enough for a TPI setup? I'm assuming an AFPR is required? This is great news (yet another part I can re-use off my V6 parts car)

 

Listen *** monkey, I never said that he needed for sure to get a new radiator. I said that he might need one. You chimed in with your smart assed comments acting like you know all. Thats great, But reread the posts

THat is what I put. I did not say the he would definately need a new radiator. Your sorry *** jumps in and starts flinging ****. No one asked for that crap, and it isnt helpful or productive. Maybe because of your lack of sex life, or just the fact that no one likes you makes you like this, I dont know. Just knock your crap off, no one likes it.

 

The stock V6 MPFI car pump is the same as the tpi pump, the only time some sort of additional regulator is needed is a carb swap where there isnt already a bypass regulator included, with a V6- TPI swap its just the same pump, on a completely irrelivant note, you could also swap a TBI setup into a MPFI V6 or TPI car and not need to do anything, so long as the pressure / volume is sufficient there is no problem, the reason a pump change is required for tbi - tpi swaps is the pumps inability to supply enough pressure.

ljno - keep quiet do us all a favor and dont post unless you've at least got something to back up what you've said, and dont get so pissy when you find out you've been proven wrong.

 

Theres ALOT of misinformation when it comes to v6 -v8 swaps. I once was told my brk lights wouldnt work anymore once i removed the v6

or how bout the "your v6 rear wont work with the v8, it wont even bolt up"

or how bout this one

" you will need to change EVERYTHING under the car from the front to the back because none of it will work with a v8"

It comes down to motor mounts, a afpr if you go carbed( or a new fuel pump) and maybe a rad.

There is a ton of little nuts and bolts that you need also.

And have fun with the motor mounts

 

By far the best is how many people think the gauges all rely on the stock computer

 

z28 if you dont like me, thats cool, I dont care. But, I was not mad about "being proven wrong". Its just funny, that you act like a total dick, and expect it to be passed over. Sorry man, you need some xanax or something.

 

You posted he "would probably" need a new radiator, after I went through a few more things for him and said his would work, you again post the same thing, after being corrected, it only gets so repetitious correcting people over and over and over and over, learn to research something before posting the same thing after being corrected.

 

ljnowell, I'm pretty sure his posts were not directed toward you personally. You have to understand that one of the main problems of a tech only website is the posting of mis-information. Over time, as members see the same wrong information being posted, they will get frusturated as they correct people. Its the same type of frusturation that builds when new members constantly ask the same questions instead of using the search button. Nobody is trying to act like a know-it-all, and nobody personally dislikes you because you tried to help. He is just frusturated with what you posted (considering multiple other people seem to have posted the same mis-information). I can understand how you feel, but please dont turn this into a personal insult battle. It sucks to be wrong (I am wrong sometimes too) but being corrected and having the correct information posted is a benifit to everyone posting and reading these forums. For instance, I just leared that I can use the fuel pump from my 88SC parts car (V6) with the MAF LB9/700R4 combo I'm hoarding for a S10 swap. This saves me a lot of $$.