Need to replace motor
Login  | |
|
Need to replace motor - 10/16/2007 6:18:49 AM
|
|
|
brittlevimom
Posts: 1
Joined: 10/16/2007
Status: offline
|
96 Blazer 4.3 Vortec motor - having trouble finding a Vortec motor can I replace with a 4.3 block and conect the Vortec back up from my motor?
|
|
|
|
|
|
|
RE: Need to replace motor - 10/16/2007 6:42:00 AM
|
|
|
rriddle3
Posts: 1551
Joined: 12/22/2006
From: Fort Worth,Texas
Status: offline
|
Vortec is the name used on the 4.3L V6's made from, I think, '86 onward. It gets its name from the design of the intake manifold and combustion chambers in the heads. Any 4.3 from a '96 onward will be a replacement for your engine.
< Message edited by rriddle3 -- 10/16/2007 6:43:18 AM >
_____________________________
2002 Blazer LS 4dr 2WD Auto Trans
Hypertech PP III Programmed
Flowmaster 50 Series Delta Flow Muffler, C6 Corvette Exhaust Tip
TYC Elegante carbon fiber tail lights
|
|
|
|
|
RE: Need to replace motor - 10/16/2007 7:01:18 PM
|
|
|
blazer4x4
Posts: 16
Joined: 9/8/2007
Status: offline
|
i just got done replacing my engine 3 weeks after i bought the truck. I bought a crate engine from O'rielly auto parts. I got quoted by 3 different places and they wanted at least 4,000 dollars to fix it so i payed 1900 dollars and me and a buddy did it ourselves. Or if you are looking to go the cheaper route go to a local junk yard there are so many 4.3 engines out there
|
|
|
|
|
RE: Need to replace motor - 10/16/2007 7:07:54 PM
|
|
|
blazinloud
Posts: 2467
Joined: 2/8/2006
From: Saskatoon, Canada
Status: offline
|
eh em! 350
_____________________________
|
|
|
|
|
RE: Need to replace motor - 10/16/2007 7:40:42 PM
|
|
|
BigGreenMonster
Posts: 401
Joined: 8/11/2006
Status: offline
|
LOL! Vortec is not like V-tec in a Honda, its not something that needs to be "hooked up". Its just a name. Finding an engine should not be very difficult at all really. You've got quite a few vehicles to choose from if you are looking at a junkyard special, Astro Vans, S-10s, Jimmys, Blazers. GM played with the injection systems all through the 90s, but I'm of the impression that all will work with minor wiring changes, and maybe a different ECM...
_____________________________
Don't tase me, bro!!!!!!!!
94 Blazer Tahoe w/ Vortec CPI- Flowmaster 40 series
'97 30th Anniversary Mercury Cougar XR-7
4.6 Modular V8 (no major modifications)
|
|
|
|
|
RE: Need to replace motor - 10/17/2007 5:20:16 AM
|
|
|
swartlkk
Posts: 15292
Joined: 5/1/2005
From: Waterloo, NY
Status: offline
|
There is quite a bit more to the induction/injection system changes over the years. In this case, any '96+ 4.3L from a GM vehicle will fit the bill, as riddle stated!
_____________________________
Kyle-
My Restoration Projects
Please Do Not PM for Tech Help
|
|
|
|
|
RE: Need to replace motor - 10/17/2007 9:02:07 AM
|
|
|
BigGreenMonster
Posts: 401
Joined: 8/11/2006
Status: offline
|
quote:
ORIGINAL: swartlkk
There is quite a bit more to the induction/injection system changes over the years. In this case, any '96+ 4.3L from a GM vehicle will fit the bill, as riddle stated!
Not to hi-jack the thread, but this raises a question I have. I had/have the opportunity to get back the TBI engine from my old 89 (Its a bit more powerful than the CPI in my 94 due to it being bored out and stuff). What exactly would be involved swapping the TBI from an 89 into a 94 CPI?
_____________________________
Don't tase me, bro!!!!!!!!
94 Blazer Tahoe w/ Vortec CPI- Flowmaster 40 series
'97 30th Anniversary Mercury Cougar XR-7
4.6 Modular V8 (no major modifications)
|
|
|
|
|
RE: Need to replace motor - 10/17/2007 9:10:39 AM
|
|
|
swartlkk
Posts: 15292
Joined: 5/1/2005
From: Waterloo, NY
Status: offline
|
Wiring, computer, etc... The engines really are quite different. I'm not sure if the PCMs are the same aside from one controlling the CPI injector and the other controlling the 2 TBI injectors. Other differences would be in the design of the EGR system. I believe that the TBI motor has a vacuum operated EGR valve with a vacuum solenoid while the CPI has a servo motor driven EGR valve. Everything else should be the same as the TBI motor was offered (not in the Blazer) until '95.
But then again, you could just swap the long block in and use the CPI induction setup. Physically, below the intake, there should be little to no difference. Although I can't remember off the top of my head when they added the balance shaft...
_____________________________
Kyle-
My Restoration Projects
Please Do Not PM for Tech Help
|
|
|
|
|
RE: Need to replace motor - 10/17/2007 9:24:04 AM
|
|
|
rriddle3
Posts: 1551
Joined: 12/22/2006
From: Fort Worth,Texas
Status: offline
|
quote:
ORIGINAL: swartlkk
Although I can't remember off the top of my head when they added the balance shaft...
I'm pretty sure that started with the 1992 4.3's.
_____________________________
2002 Blazer LS 4dr 2WD Auto Trans
Hypertech PP III Programmed
Flowmaster 50 Series Delta Flow Muffler, C6 Corvette Exhaust Tip
TYC Elegante carbon fiber tail lights
|
|
|
|
|
RE: Need to replace motor - 10/17/2007 9:39:09 AM
|
|
|
swartlkk
Posts: 15292
Joined: 5/1/2005
From: Waterloo, NY
Status: offline
|
THIS should answer your questions. The missing balance shaft won't matter to an 89 engine since it wasn't even thought of then. All of your induction components should bolt up though.
Tim (hanr3) put an '85 block in his '93 CPI truck. Here's his explaination on what he had to do: Are all 4.3's created equal?
_____________________________
Kyle-
My Restoration Projects
Please Do Not PM for Tech Help
|
|
|
|
|
RE: Need to replace motor - 10/17/2007 10:41:48 AM
|
|
|
Hanr3
Wheels & Tire Moderator
Posts: 3523
Joined: 5/11/2005
Status: offline
|
quote:
ORIGINAL: brittlevimom
96 Blazer 4.3 Vortec motor - having trouble finding a Vortec motor can I replace with a 4.3 block and conect the Vortec back up from my motor?
Any 4.3L from '96 on. Swap your intake manifold and sensors into the new engine and it will work just like your current engine.
*Combining Consecutive Posts*
quote:
ORIGINAL: blazinloud
eh em! 350
Amen!
and for less then $2000.
*Combining Consecutive Posts*
quote:
ORIGINAL: BigGreenMonster
quote:
ORIGINAL: swartlkk
There is quite a bit more to the induction/injection system changes over the years. In this case, any '96+ 4.3L from a GM vehicle will fit the bill, as riddle stated!
Not to hi-jack the thread, but this raises a question I have. I had/have the opportunity to get back the TBI engine from my old 89 (Its a bit more powerful than the CPI in my 94 due to it being bored out and stuff). What exactly would be involved swapping the TBI from an 89 into a 94 CPI?
Swap the intake manifold and block sensors from the '94 onto the '89 long block.
*Combining Consecutive Posts*
Thanks for the Kudos Kyle.
I love that tech article about the 4.3L changes over the years. Full of info.
< Message edited by swartlkk -- 10/17/2007 10:51:28 AM >
_____________________________
"Some people spend an entire lifetime wondering if they made a difference.
The Marines don't have that problem."
-President Ronald Reagan
'87 S10-Blazer - SOLD
'93 S10-Blazer 4x4x4 - Sons DD, engine swap is done.
'00 S10-Blazer 4x4x4 - My
|
|
|
|
|
RE: Need to replace motor - 10/27/2007 2:22:42 PM
|
|
|
fulltimehustler
Posts: 2
Joined: 10/27/2007
Status: offline
|
quote:
ORIGINAL: BigGreenMonster
LOL! Vortec is not like V-tec in a Honda, its not something that needs to be "hooked up". Its just a name. Finding an engine should not be very difficult at all really. You've got quite a few vehicles to choose from if you are looking at a junkyard special, Astro Vans, S-10s, Jimmys, Blazers. GM played with the injection systems all through the 90s, but I'm of the impression that all will work with minor wiring changes, and maybe a different ECM...
i haven a 93 blazer wit 4.3 vortec...pulled it out and was going to replace with a 4.3 from a astro van but it wouldnt work at all...because the4 vortec engine has a balance shaft and the Astrovan didnt which means it would throw the engine off(im sure)...we were thinkin we coould just change the heads (if needed) and put the vortec on the astrovan but once we started overhauling we decided to just keep the original engine and rebuild it, so im waitin for parts now once they come in ill put the engine back together and hopefully it will work out fine...funny thing is one of the rods on a piston was bent...i had the crank machined and thATS when we noticed the bent rod. so now ive taken a piston out of the astrovan engine and will use it in the vortec, im hopin it will work...
|
|
|
|
|
RE: Need to replace motor - 10/27/2007 5:11:44 PM
|
|
|
rriddle3
Posts: 1551
Joined: 12/22/2006
From: Fort Worth,Texas
Status: offline
|
quote:
ORIGINAL: fulltimehustler
...funny thing is one of the rods on a piston was bent...i had the crank machined and thATS when we noticed the bent rod. so now ive taken a piston out of the astrovan engine and will use it in the vortec, im hopin it will work...
Have you read this article, especially the parts about cranks, rods, and pistons?
http://www.babcox.com/editorial/ar/ar40047.htm
_____________________________
2002 Blazer LS 4dr 2WD Auto Trans
Hypertech PP III Programmed
Flowmaster 50 Series Delta Flow Muffler, C6 Corvette Exhaust Tip
TYC Elegante carbon fiber tail lights
|
|
|
|
 Today's Posts
Most Active Topics
Make A Donation
Forum Rules & FAQ
RSS Feeds
Chevy Blazer Prices
Chevy Blazer
Trailblazer SS
Advertising Info
|
Blazer Forum .com is not affiliated with or endorsed by Chevrolet Motors Division or General Motors.
|
Printable Version
