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Old 08-10-2014, 09:37 PM   #1
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Default '97 S10 Engine Swap

Got a '97 S10 with blown HG on a 4.3. Can a 4.3 from an '03 Silverado fit this properly and if so, are there mount modifications or other considerations I need before considering making the purchase of this used engine?
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Old 08-11-2014, 05:44 AM   #2
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First question, how do you know it has a blown head gasket?

The blocks are the same. Only thing will be different is some of the sensors. As a precautionary, always transfer over ALL over your 97 sensors. MAF, MAP, TPS, IAC, CAM, CRANK, KNOCK, IGNITION to the new engine.
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Old 08-11-2014, 02:55 PM   #3
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Cylinders are full of coolant.... either gaskets or cracked block. Sometimes easier just to swap engines..... I will check to make sure it'* just not the intake gasket, but the "gut" feeling is..............
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Old 08-11-2014, 08:00 PM   #4
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Take the plugs out and crank it over by hand. Then do a compression test. They are pretty tough and lower gaskets are way more common if it hasn't been run that way

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Old 08-11-2014, 09:15 PM   #5
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Easier to swap engines? 4.3?'*? I beg to differ. You'd be better off pulling the heads and replacing the gaskets vs swapping engines. And who knows WHAT you'll end up with as far as a donor engine.
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