Question about 1994 Chevrolet S-10 Blazer

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Engine swap I've just bought a 94 s-10 blazer with 4.3 vortec engine that has most probably a spun main bearing. In addition I have acquired a 4.3 with throttle body (carberated) engine, year unsure, to swap out with original. Is there much difference between the two? Looks like I will need to change intake manifolds but is there any other differences or changes that I need to know about? Not sure what year the good motor is for sure but it must be close to the 94 and most likely a little earlier. It has all the same part configuration and arrangement except the intake manifold/injection component. I do have the option of another engine which should bolt right up however I would need to pay a bit more in addition to removing it from vehicle. Which would be the best choice? Another option I suppose would be to remove the crankshaft from the bad engine and see if it can be turned. Not sure which way to go at this point.

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Take the engine thats a direct swap and save your self a lot of head akes, even if it costs you a little more. Did you ever consider a jasper engine there a little pricey but you do get a good warenty and you can buy it either as a long block or short block, long block is with heads and short is with out heads. You can do as you want, but my advise would be to get a direct replacement. As far as crank regrind that could cost you more than the replacement if the rod that spun needs replaced as engine would have to come apart to do that, gasgets, parts, labor, regrind crank, bearings, ect.

Posted on Feb 21, 2009

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Forget the last option. Crank pins are really too thin for turning and will go "egg shaped" after a short time. Also, material from failure is likely all over the place inside oil galleys and passages Just asking for problems! I'd check with a junkyard to find out what fits what... by experience, they seem to know more than the dealers (it's their business!) Other than that, I'd go with the engine with the least miles and cleanest insides (no sludge buildups etc) Or the one that you actually saw running.(no smoke, knocks or excuses from owner) Sometimes a bit more work is worth the effort in the long run!!!
good luck

Posted on Feb 21, 2009

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What the torque specs. For a 2002chevys10 4.3vortex mains and rod bearing


Torque Specs Database

Type: Dim: Length: Head: Nut Grade: 20 Ft-Lbs 240 In-Lbs 27.12 N-m Connects: Connecting Rod To Engine Block Years: All Vote Record: Vote Note: Vortec - Rod Cap Nuts - 2 Steps: 20 FtLbs; +70degs

http://ww2.justanswer.com/uploads/ZZdaryl/2009-06-14_153454_torque.pdf

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1 Answer

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4 Answers

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