coolant lines on 4bt - TDR Roundtable

coolant lines on 4bt

04-16-2004, 10:52 PM

#1 (permalink)

MikeN

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Join Date: Feb 2004 Location: Michigan Posts: 22

coolant lines on 4bt

I'm in the process of putting a 4bt into an '89 Chevy.

My 4bt has a total of 5 coolant ports coming out of it. Two are large diameter and obviously go to the radiator.

Three are about 3/4" ports and I'm not sure which one I should use to run the line to my heater core, and whether I should just cap off the others.

One of the small outlets is on the passanger side of the thermostat housing. One is on the driver side of the thermostat housing. And a third is next to the large diameter inlet where the lower radiator house is connected to the block.

Which one should I use to go to my heater core? Can I just cap the others off? What were they for originally? I have a Frito-Lay truck motor. The guy I bought it from said that it had an air-to-air intercooler, but maybe it had a air to water?

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