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Unread 02-25-2007, 06:30 PM   #1
ShowMeJeep
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Vortec Or No Vortec...That Is The Question

Ok I was talking to LeftLane Trucking and he wasn't sure. I just brought home my 4.3 V6 donor van. Its a 1991 Chevy Astro with All Wheel Drive. It has a MFG date of 1990 and titled 1991. I don't know if its a vortec or not. I cant get the dog house off to look at any numbers. If anyone knows here is the VIN 1GNEL19Z5MB112010. Also can anyone tell me which transfer case they used on the astro AWD vans.

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Unread 02-25-2007, 07:29 PM   #2
mean90yj
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the engine you have is 4.3L V6 TBI OHV 12V. dunno if that helps. My truck is vortec and it says on a plastic cover that covers up a little part of the electronics. I dunno if that helps. i don't think it is because i looked up the engines in 1991 chevy astro's and it just says its a 4.3L v6. nothing about it being a vortec...sorry
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Unread 02-25-2007, 07:34 PM   #3
leftlanetruckin
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should be a tbi motor, so you will have the same as me!!!

come on down and get your ideas.....

martin
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http://www.jeepforum.com/forum/f12/swap-offically-underway-324622/

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Unread 02-25-2007, 07:37 PM   #4
TellyDSP
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it appears the Vortec was availablr after 85, I would assume yours it. This is purely based on this thread I found on Pirate.

http://www.pirate4x4.com/forum/showthread.php?t=324209
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Unread 02-25-2007, 07:40 PM   #5
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Quote:
Originally Posted by TellyDSP
it appears the Vortec was availablr after 85, I would assume yours it. This is purely based on this thread I found on Pirate.

http://www.pirate4x4.com/forum/showthread.php?t=324209
the s10's/jimmy's had the tbi until the mid 90's telly, would guess the astro was the same. easy enough to tell, can you see a tbi on top of the motor, or is it mpi? mpi is the vortec. just do a search on 4.3 vortec's and havea look at the pics. can see the difference a mile away....
martin
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1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.The Cherylkee....
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover 4.6 HSE
2000 4.7 4WD WJ with a rebuilt motor.
4.3/700r4/new frame buildup (YJ)....
http://www.jeepforum.com/forum/showthread.php?t=324622

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Unread 02-25-2007, 07:42 PM   #6
TellyDSP
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Based on the VIN it's TBI. Considering what Martin said with the MPI being the VOrtec, then it is not.
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Unread 02-25-2007, 08:22 PM   #7
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It is indeed ôVortec engine. However it is the TBI HO version 170hp, and not the 200hp CPI or 195hp CSFI that people assume are the only "Vortec" engines.


As leftlanetrucking said, the ôVortec name was first introduced with the TBI engine in 1986. As a matter of fact the then unknown Tim Allen had a great series of commercials where he would promote different "Vortec V6" powered tools. Most people don't realize this, and refer to "Vortec" as the '92 and later CPI and CSFI engines. Those are the engines that they started pouting the word Vortec on the plastic, and they also received better flowing heads.

The transfer case is the same Borg-Warner 4472 that was used in the GMC Typhoon and Syclone. They were near 300hp, and are strong but lack a low range.

BTW don't trash that van, that is one of the two BEST years for the Astro V8 swapper guys out there. With the all wheel drive traction and V8 power, they make excellent sleepers.
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Unread 02-25-2007, 08:25 PM   #8
leftlanetruckin
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he is putting the 4.3 into the yj, but he may be able to sell off the van and other junk then huh?
is the 700r4 the same as the 4wd one? meaning he can get the 231c and bolt it on?
never dealt with the van stuff.....just the s10 junk on mine!
martin
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1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.The Cherylkee....
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover 4.6 HSE
2000 4.7 4WD WJ with a rebuilt motor.
4.3/700r4/new frame buildup (YJ)....
http://www.jeepforum.com/forum/showthread.php?t=324622

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Unread 02-25-2007, 08:56 PM   #9
ShowMeJeep
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It was dark out by the time I got it home. And im not ready to tie up my shop with the van yet. So thats why I wasn't for sure on the vortec stuff. But yes its TBI. I acually got 2 astro vans ones a 1988 and then my donor the 1991. The 88 runs but the 700r4 has the last 2 gears out of it. My dad wants to pull the tranny and rebuild it to pull his fishing boat down to the river. So I get the non runner. it will need the motor rebuilt and the tranny also.
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Unread 02-25-2007, 08:57 PM   #10
-=DeanstuD=-
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Yeah, I'd go over to www.astrosafari.com and post it up there for sale. Well, I actually would probably do the V8 conversion and then sell it. You can literally drop an L05 V8 in using the same exhaust crossover and all wiring and computer. It literally plugs right in.

Yes the he could use the 700r4 and a 231c. Believe it or not guys actually lift and wheel the Astros. Some have converted to different transfer cases to get the low range.
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Unread 02-25-2007, 09:00 PM   #11
Jesse-James
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Quote:
Originally Posted by leftlanetruckin
he may be able to sell off the van and other junk then huh?
Check out http://astrosafari.com/, plenty of guys buying parts and projects over there and there are some real knowledgeable people when it comes to the 4.3.

BTW, ever see an astro flex?

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Unread 02-25-2007, 09:01 PM   #12
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Ya beat me to it.
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Unread 02-25-2007, 09:02 PM   #13
leftlanetruckin
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i completely rebuilt my 4.3, and bored it over, if you need anything, let me know, or come down when im in and do it then. i'll be messing with my junk, but will be there to help...
as far as the tranny goes, all i did to mine was change the filter and clean it...then put a new tvi cable on and that was as brave as i get with auto trannys....
heres what it will look like....just got to get the new air filter and box on there....cheers rob!
finished-motor.jpg

martin
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1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.The Cherylkee....
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover 4.6 HSE
2000 4.7 4WD WJ with a rebuilt motor.
4.3/700r4/new frame buildup (YJ)....
http://www.jeepforum.com/forum/showthread.php?t=324622

Years to gain the hands on experience, and offer it freely.
Minutes to gain the knowledge from the internet, and quote it just as freely.
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Unread 02-25-2007, 09:13 PM   #14
ShowMeJeep
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Ok Martin sounds good. I don't know when I will get this thing started. The motor is still in the jeep. I think im going to wait till I know for sure if the block in the van is still rebuildable. That way I can still wheel in the jeep till I get things ready to swap. I need to go get a cherry picker and some jacks come to think about it. I wonder since im pretty much going to have to pull the whole front of that astro to get the motor out if it isnt just s easy to pull it still bolted to the front sub frame as one piece. Well good night all.
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Unread 02-28-2007, 02:09 PM   #15
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Ok been a few days but decided to tear into the van a little. I got pretty much everything unhooked electrical wise. I got the two motor mount bolts to pull and unbolt the tranny unless I pull both out at once. Haven't decided yet since there isn't much room to pull it out in the first place. I haven't hacked any wires I just unhooked everything. Im going to be using the Painless Harness when I swap into the jeep. One thing I can't figure out is the "bulkhead" harness. Its the wires im guessing that goes to the ecm. Its the only bunch off the engine going through the firewall. I can't seem to unplug them. I figured I could just cut through them since I was going to be using the Painless Harness but wanted to see what everyones thought was on that. The van is in pretty rough shape. Thought I would sell the AWD system to someone over at the Astro Van Forums and scrap the rest. Anyway of to tear some sheet up!!!
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