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Old 05-24-2012, 10:49 AM
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4.3 TBI question

Hi guys, I'm new here but after much googling, this seemed to be where people had the most knowledge about the Chevy 4.3 V6.

I'm 20, and I have an 87 El Camino I bought just before my 19th birthday, and about a year after owning it, the radiator was all rusted out and started leaking, leading to horrible engine damage. I've since gotten another car since then and the Elky is just sitting there, killing my soul. (I love this car, i'm sure many of you can understand) Now I want to fix it up again, dunno if it's better to fix it to sell, or keep as project car, but I don't want it to end up in the scrapyard. Anyways this leads to my question....

After putting up a craigslist wanted ad for a 4.3 engine I was first going to ask about putting the headers from a 97 cpi onto a tbi, due to an offer from a guy with a 97 engine.

But now someone with a 95 s10 with tbi has offered his engine to me for around 400 bucks including all the gadgets and gizmos attached all the way to the muffler.

If i just swapped the engine directly from the 95 TBI to the 87 El camino(which originally had a 4.3), how 'bolt on' would this project be?

Wikipedia states the compression ratio on the Elky to be 9.3:1
While the s10 has 9.1:1

And specifically how many other parts would i have to buy if any?
I don't have alot of money right now, but getting it running again would help me justify keeping it in the driveway at least so my parents don't get mad about the rustbucket.

Thanks for reading.

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Old 05-24-2012, 04:35 PM
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It will be very close to a plug and play swap. You might need to swap out the front accessories/brackets/pulleys (including the water pump) from the original engine onto the newer engine if they are different. But the old TBI and distributor will bolt onto the newer engine, as will everything else. If the computer is going to be used, swap out all the sensors along w/the rest from the old engine onto the new engine so the computer isn't confused by sensors from a different system.

If the flexplate/flywheels are different diameters, use the correct starter that matches the diameter of the flex/flywheel. More on starters and flexplate diameters here.

Last edited by cobalt327; 05-24-2012 at 04:41 PM.
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