i would think so... someone will chime in and say something more concrete. IIRC they are the same motor. but then again it might not be because the S10 is RWD and i know that the S10 V6 is different from the Fiero V6
The only part I know of for the 2.5 engine is 12351904 which is used to replace 2.5 engines for both Chevrolet and Pontiac.
It appears that they are the same block, however, the valve sizes could be different. This is beyond my knowledge. In short, I expect it will do the job.
------------------ 4.9 Caddy in Garage! Car in Driveway! ACK! **************************************** http://home.cfl.rr.com/fierose Central Florida Fieros http://www.centralfloridafieros.org Proud Member and founder of the DOWN SOUTH SUNNY WINTER PICK ON SNOW PEOPLE COALITION!
I believe the S10 pickup and blazer went to the DIS version of the engine in 87 like the cars. The distributor and DIS heads are different due to an intake change and use of 700 series TBI on the later units.
The heads may bolt up but the intakes don't interchage between heads.
------------------ The only thing George Orwell got wrong was the year...
I believe the S10 pickup and blazer went to the DIS version of the engine in 87 like the cars. The distributor and DIS heads are different due to an intake change and use of 700 series TBI on the later units.
The heads may bolt up but the intakes don't interchage between heads.
wasn't the throttle body a larger bore too?
------------------ Take a deep breath... smell that? It's a cleaner, fresher PFF! ***Custom 85 under construction, 87 Coupe in the driveway. The fun never ends!***
ok well if i swap the whole head will the exhaust manifold bolt up and can i just leave the fiero intake on it and im not positive but the plug in on the tbi looks the same as the fiero so if it will plug up will it work?
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09:57 AM
m0sh_man Member
Posts: 8460 From: south charleston WV 25309 Registered: Feb 2002
While we're at it... Can I swap my 2.8 Fiero heads onto my 2.8 S10 TBI??
yep, its like bolting on 20HP and 20ft/lbs (plus or minus 5-10HP)
its a GREAT upgrade for the small valve v6 heads.
i bought a 88 fiero coupe that the owner rebuilt the entire motor before i got the car, but he used the head from a 85 celebrity, once rebuilt he couldnt figure out why the car ran like ass, missed, idle would jump up to redline all the time, all kindsa stuff, well it turned out that the intake was wrong for the head and it was only running properly on ONE cylinder, the others had big gaps in the gasket for them on the intake side, needless to say i didnt figure it out until after i swapped a 3.4L v6 in, but had i known that was the only problem, i may have kept the 4cyl in the car for a bit longer.
matthew
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03:26 PM
PFF
System Bot
FastIndyFiero Member
Posts: 2546 From: Wichita, KS Registered: Aug 2002
I believe that the S10 head uses a different head bolt pattern, i.e. the bolt closest to the water pump is farther inboard or outboard, can't remember which. Just something to watch out for.
In my experience 86/87 was a changing point in the head design and intake manifold design. Had to replace the head on my 86 and grabed one off of an 87 celebrity (didn't know there was much difference at the time). Everything bolted up fine except the intake which was redigned and the intake passages were raised about 1/2". I suppose you could swap with a different intake manifold, but that would involve changing the throttle body as well as the wiring to the TBI. Personally if you just want a quick swap, I'd suggest sticking with an 87 or later head.
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12:45 PM
FastIndyFiero Member
Posts: 2546 From: Wichita, KS Registered: Aug 2002
All of the 2.8s use the same head bolt pattern. I bet the 2.5 head bolt is the same as well.
JazzMan
Yes, I'm talking about the 2.5. There are definitely two different bolt patterns, however, because of the different water pump setup. I can't remember which S10's had the wide pattern and which had the narrow.
Nate
[This message has been edited by FastIndyFiero (edited 12-22-2004).]
