Throttle body cooler

[dieseltech]

I am puting an ls1 in my blazer and was wondering what to do about the throttle bypass that goes across the heads.

Can I just plug them like the rear of the head or do I need to circulate the coolant?

[Spikito]

look up "throttle body bypass"

[pajeff02]

The pipes coming out of the heads act as an air bleed, so I would not cap them off. You can bypass the throttle body and simply run the line back to the radiator. As this is a custom install, you may not have the bung on whatever radiator you are utilizing, so you may have to get creative.

[Firebirdjones]

The pipes coming out of the heads act as an air bleed, so I would not cap them off. You can bypass the throttle body and simply run the line back to the radiator. As this is a custom install, you may not have the bung on whatever radiator you are utilizing, so you may have to get creative.

Jeff is correct,,,, Usually on a custom swap, if you don't have a radiator with the appropriate return, the water pump is drilled and tapped for a return or I've also seen a return to the radiator overflow tank on some swaps.