hi all got some questions,i was told a s10 head will fit my car,87 2.5 so i went to look at a couple at a freinds,#1 what years will fit i looked at a 89 and a 91,also does the filler neck swap out the ends on this head,the s10 has a thermo housing on the wrong end is there a freeze plug on one end you can remove and swap the filler on a fiero i can get a head cheap with decent miles on it thanks mark
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josef644 Member
Posts: 6939 From: Dickinson, Texas USA Registered: Nov 2006
Just punch out the freeze plugs and install your thermostat housing. Install a new freeze plug on the other side where the S-10 thermostat housing used to be. The best 2.5 heads are from 1990-1993. You will also need the correct intake manifold.... the fiero intake will not bolt onto the newer style S-10 head.....but everything else will. The Fiero push rods will be to short and must be replaced.
ok this is waht i got ,i can use the 91 and the push rods i need are mrp-309 now can i use the intake off the s10 does i have the same tbi i did not check that so i looks like im good to go with what i can get with the from my freind a get alittle performance right later mark,ps i dont want the hole engine because i have great coompression readings on this engine and there is no need
ok this is waht i got ,i can use the 91 and the push rods i need are mrp-309 now can i use the intake off the s10 does i have the same tbi i did not check that so i looks like im good to go with what i can get with the from my freind a get alittle performance right later mark,ps i dont want the hole engine because i have great coompression readings on this engine and there is no need
No.... the S-10 pushrods will not work. They are also too short. 90-93 S-10 heads on an older block (Like the Fiero) require longer push rods.
Check with an automotive machine shop about the valve sizes. A friend of mine who owned a machine shop said he took in a Fiero engine to be rebuilt, because they couldn't find out why it ran so oddly. Turned out it had an S10 head on one side and a Fiero head on the other. Different size valves. The S10 are smaller. Don't breathe as well.
well dont have to worry only got 1 head lol thanks for the heads up,im going to have to go forward soon with this going to start getting parts together today so i'll have to post when im done later mark
