Author Topic: chevy 4.3L swap (Read 7784 times)

toyotamobing · « **on:** Feb 29, 2008, 07:49:09 PM »

how difficult is it to swap in a 4.3L TBI into an 84 CA pick up? also including making it smog legal?

i have an 89 s10 with the 4.3l and a 700r4 tranny in it and ive been thinking about swaping both or just the motor into my toyota. ive heard stuff along the lines of needing a body lift and knocking back sum of the firewall and im woundering whos done it and what their experience was and some of the pros and cons of doing it.

Ferg · « **Reply #1 on:** Feb 29, 2008, 08:46:35 PM »

Not too bad. Check out the Toyota FAQ on pirate. Lots of info. Why not a 3RZ? See Big Mike for those answers.

Simple search here. http://board.marlincrawler.com/index.php?action=search2

Nothingface5384 · « **Reply #2 on:** Mar 02, 2008, 08:48:49 AM »

i'm pretty sure you'd still need a xfer case out of an 80's fullsize pickup as the one in the s10 is ont he wrong side $That\'s Gay$

toyotamobing · « **Reply #3 on:** Mar 02, 2008, 12:05:41 PM »

my s10 is a 2wd...so using the tranny would probably not happen unless i decied to spend the money on a divorced tcase

COToy91 · « **Reply #4 on:** Mar 02, 2008, 05:27:01 PM »

I have done it and it was one of my first projects. It was pretty straight forward if you buy a wiring kit instead of building the harness yourself. Other then that if you dont do a body lift things get tight and you will have to modify the firewall and also trim for the exhaust. If you want to retain your stock five speed i have the conversion bell housing and clutch and a lot of the parts for sale if you are interested. Also it would be an easier swap into an 84 cause it already has a solid front axle and you do not have to worry as much about oil pan clearance
Let me know what model trans you have in your toy, and then you would only have to swap the engine in and the tcase and trans can stay in the same posotion

PM me with any questions you might have

FIREBALL · « **Reply #5 on:** Mar 02, 2008, 07:43:26 PM »

Don't cut any corners when it comes to using the factory smog stuff. As long as it still has all the same smog systems that it had while it was in the blazer you'll be fine. (charcoal canister, cat, factory intake or CARB approved intake, etc.)
I passed the inspection first time around when I did the 93cpi 4.3.

toyotamobing · « **Reply #6 on:** Mar 03, 2008, 08:58:15 PM »

so all you need to make it legal is all the original smog equipment that came with the engine in the original vehical???

FIREBALL · « **Reply #7 on:** Mar 03, 2008, 09:35:10 PM »

Basically yes. You have to smog to what's newer, the engine or the vehicle. In your case, because the engine is newer than the truck you have to make sure all the emissions equipment that that motor came with are still intact when you put it in your yota.
It's a great conversion and it's really not all that hard. You'll be glad you did it!

toyotamobing · « **Reply #8 on:** Mar 05, 2008, 12:00:01 PM »

now should i or do i need to upgrade my tranny or tcase??

COToy91 · « **Reply #9 on:** Mar 05, 2008, 12:34:45 PM »

If i was going to do it i would upgrade to a W56 but there are plenty of guys who run everything stock with the conversion bellhousing and swap the engine in. If you really like the skinny pedal a lot then i might suggest upgrading, Personally i have never broken anything in the trans or the tcase

toyotamobing · « **Reply #10 on:** Mar 05, 2008, 06:23:34 PM »

ive heard of a majority of guysrunning the turbo tranny with the larger engines...is that just procautionary or agood idea?? fyi i have a heavy foot

COToy91 · « **Reply #11 on:** Mar 05, 2008, 08:37:03 PM »

I would just say precaution, i mean i break axles before anything else even when my foot is to the floor. 4.3 is a torquey engine but i dont think you will destroy a trans that easy

toyotamobing · « **Reply #12 on:** Mar 05, 2008, 10:12:32 PM »

good to know...does it matec if the enginecame out of an auto or manual

COToy91 · « **Reply #13 on:** Mar 05, 2008, 10:26:21 PM »

Well if you are using the wiring from the blazer, look up the thread werty put together about what you need. Either that or go with a premade harness that comes with a computer. If it came out of a truck with a manual there is not much you have to deal with, the auto on the other hand the computer from the blazer will look for park/nutral for start and it will also idle higher. The engine itself will not matter either way, you want an auto toss a flex plate on, manual put the flywheel on and tap in that pilot bushing. Its more of a computer issue than anything.

This is what i used though for the engine swap its idiot proof, everything is labled:
http://www.howellefi.com/shop/customer/product.php?productid=16224&cat=0

Are you wanting to run the 700r4 or the toyota trans?

toyotamobing · « **Reply #14 on:** Mar 06, 2008, 06:24:58 PM »

ok just for clarification its a 1989 chevy s10 pick up 2wd...not a blazer

toyota 5spd

COToy91 · « **Reply #15 on:** Mar 06, 2008, 07:03:53 PM »

It is the same enigine though, look at the eighth digit of the VIN it will be a Z. The 4.3l is the Z type. Any who then since you want to run the toy five speed you will just need the engine wiring kit of make it yourself, cat, and all other emissions equipment. If you are interested I have the conversion bell housing, clutch, flywheel, slave cylinder and a few other things for sale.

What I have for you:
AA bellhousing for 4.3L/V8 conversion with all hardware-$225---$455.40 new from AA
Centerforce clutch w/ pressure plate and flywheel for conversion-$185---$306.75 for the two new from AA
Slave cylinder from a land cruiser-$50---$69 new from AA

Things you will need w/ part numbers from AA and from other places:
(P/N 716148) Pilot Bushing .670 ID X 1.090 OD $20.70
(P/N N1430) GM Flat Face Release Bearing $42.00
P/N 716179V) Modified GM Release Arm, Toyota Truck V8 conversions (168 tooth flywheels) $75.90
Engine mount (P/N 713126) GM 4.3L V6 engine mount kit $155.25

New Total: $1125
Mine/New Total:$753.85

Plus Wiring kit from howell is $350, painless wiring or downey also make them and you already have the engine and emissions crap so your good there

So thats about what you would need off the top of my head, oh and the radiator i used was out of a dodge, its a four row and it handles cooling well, i used two ten inch electric fans

ajordan1975 · « **Reply #16 on:** Mar 07, 2008, 06:00:54 AM »

i have a buddy that has a 4.3 w/ a th350 tranny. running dual toy tras cases. he loves the set up.

FIREBALL · « **Reply #17 on:** Mar 07, 2008, 07:50:56 AM »

To be able to pass the inspection the computer must match the tranny. So, if you take the motor from an automatic S10 and run a manual toyota trans you will need a manual computer for the 4.3.
On Marlins recomendation I used a wiring harness from www.howellefi.com and they also were able to provide me with the proper computer. Their harness was reasonbily priced, very clean and very well marked.

toyotamobing · « **Reply #18 on:** Mar 11, 2008, 11:24:34 PM »

is the computer from the kit an oem computer?

COToy91 · « **Reply #19 on:** Mar 11, 2008, 11:29:45 PM »

yes the computer that comes with the kit is oem, but they put in the proms and other chips for the engine application

Lizard_lips · « **Reply #20 on:** Mar 12, 2008, 08:43:06 AM »

Putting one in mine. have a post in the rig gallery forum

FIREBALL · « **Reply #21 on:** Mar 13, 2008, 10:56:16 AM »

That's the beasty I had in my rig. Good running motor with lots of power, but that air cleaner there wouldn't pass here in Cali.
The only thing I didn't like about that motor was when you did kill it and re-started, it would rev pretty high for a second or two before it came back to an idle. Which really sucks when you start it in gear on the trail. You take off like a bat outa hell. But you can put a switch in line or just unplug the tps and it takes care of that problem.

toyotamobing · « **Reply #22 on:** Mar 18, 2008, 08:28:31 PM »

i wish mine was a vortec

COToy91 · « **Reply #23 on:** Mar 18, 2008, 09:04:55 PM »

mine is a 1991 tbi and it says vortec on the valve covers lol to bad its not

Nothingface5384 · « **Reply #24 on:** Mar 19, 2008, 09:02:51 PM »

toyotamobing · « **Reply #25 on:** Mar 26, 2008, 12:35:32 PM »

ive been pondering the thought of keeping my s10 whole and instead swap my 22r for a 3.4l...what are some pros and cons of the 3.4 over the 4.3

slabcs · « **Reply #26 on:** Mar 26, 2008, 01:08:25 PM »

pros: it's a lot cooler, that's for sure.

toyotamobing · « **Reply #27 on:** Mar 26, 2008, 04:46:40 PM »

you dont count!!!!! unless you and your pops want to sponsor me...

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