corvettedave

Ive got a new LS3 for racing offroad 4x4 car, dont need heater in it, what can I do with the waterpump in/out for heater, someone said they should be pumped into a heater, if you dont that can affect engine cooling, etc

thoughts please?

dave

S10xGN

iTrader: (11)

You'll get mixed opinions. Most say blocking them causes bypassing the radiator. I have mine going to a heater core, but the valve for the heater is a "positive seal" block valve, so what's the difference? I have no issues at all...

DietCoke

iTrader: (18)

Pumping them into a heater does nothing. You can remove them, or loop them.

rsz288

Thermostat operation does wierd things if they are blocked. Looped and the tstat and cooling system operates normally. If they are blocked then the tstat sits in a "cold" spot of static water which causes late opening of the thermostat at low speeds with excessive heating and then excessive cooling at higher speeds. This is with a factory stat at least.

This is why the factory setup has water flowing between them at all times with a bypass type heater control valve.

corvettedave

Thanks for help guys

is it ok to use a 4 inch piece of rubber hose or does it need to be longer?, I wouldnt of thought it would make any difference?

cheers

dave

rsz288

As long as water flows through it, it doesnt care. Maybe you can find a molded u turn hose that will fit.

garys 68

iTrader: (1)

I'm running mine with a heater control valve which effectively blocks it. No problems. In modern cars, there is always flow through it though. Also marine versions loop the inlet/outlet, so I do believe it works better with flow through it all the time.
If you search the conversions forum, there's a part number for a loop hose.

corvettedave

many thanks guys
cheers, dave