4.3 OMC Replacement

[jdtower23]

I have an '88 4.3 OMC....looking at my options for replacing it....found a '95 4.3 out of a Chevy S-10.....the '95 has the same intake manifold style as mine(non-Vortec) but I believe has a balance shaft....

Anyone see any problems with this swap? I have a heat shield underneath my intake that may interfere with the balance shaft....what can be done to alieve that?

Also, this motor has a serpentine setup and mine isn't....would that add major cost?


Thanks a lot,
John

 

[jdtower23]

Re: 4.3 OMC Replacement

I should add, I'm aware I'll have to change the head gaskets to marine and install brass freeze plugs.....any other concerns?

Thanks

 

[Dakota47]

Re: 4.3 OMC Replacement

no need to change the head gaskets..

 

[brunolund]

Re: 4.3 OMC Replacement

i did almost the exact opposite. had a 96 non vortec with balance shaft, changed to a 90 jimmy, without a blaance shaft. worked great with minor issues. i had to use my balancer as the crank pulley wouldn't fit on the new one. i didn't change head gaskets as it'll only see fresh water. i did change core plugs though. the only other issue i had was with the dipstick. you'll nee to use the marine one as it needs to get to the bottom of the pan. my new engine had a deeper pan, and no hole for ther clamp that hold the dipstick tube. very minor fab work, and she now mint.the

 

[jdtower23]

Re: 4.3 OMC Replacement

Thanks for the responses....anyone know about the heat shield underneath my current intake manifold? Someone told me before it may interfere with the balance shaft?

Thanks

 

[jdtower23]

Re: 4.3 OMC Replacement

ttt