Question about 1988 Chevrolet S-10

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How hard is it to swap out a 2.8 to a 4.3 in a chevy s10 blazer??

I have an old 89 s10 blazer with a 4.3, almost 200,000 miles on it, considering having it remanufactured because it is a GREAT engine. to buy even a used one is about $1,500! WOW! i purchased a MINT 88, BUT it has the 2.8 :( with only 75,000 miles on it. they are the exact same. 2 door, 4wd, automatic, air. how hard would it be to put a 4.3 in place of my 2.8?? i love my old 89 but it is in sad shape. was looking to restore it till i came across this mint 88. but sadly, the 2.8 doesnt even stand up to the 4.3. i'm a girl with a great respect for vintage diehards and s10 blazers for some strange reason. not a flashy vehicle but VERY reliable. the only way i can express my passion for this vehicle, you ever have the BEST dog, your best furry friend? passes away and you try to replace them? doesnt happen. my blazer is my loyal dog ha. please help me :')

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  • mmatters73 Apr 23, 2009

    everything in interchangeable? i wont need to change the tranny, wire harness, computers, radiator or exhaust manifolds?? i've learned that the 2.8 V is at 60 degrees and the 4.3 is at 90 degrees, therefore making the top half much larger. i've been discouraged from doing this like i was discouraged from putting a 3 inch body lift on it. too many mods just to give it a lift and make it "appear" tough ha. i just dont want to have to change too many origional parts. this is a very tough truck to come buy especially in the condition its in.

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  • 183 Answers

Just pull the wiring harness and ECM. Everything else should be cake. Don't forget to protect the ECM from static, electric. No plastic bags, metal, or anything electrically or statically conductive. put it on a wooden shelf or something.

Posted on Apr 23, 2009

  • Calvin Hart
    Calvin Hart Apr 23, 2009

    Nope just the Computer and Wiring Harness, ECM stands for Engine Control Monitor. Have fun girl, don't get all intimidated. It will be fine.

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