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Old 12-06-2024, 03:05 AM   #1
lil hoodlum
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Join Date: Oct 2009
Location: Denton, Texas
Posts: 1,735
Question on flushing cooling system

My orginal Champion aluminum radiator has developed a small leak. I used JB weld in an effort to seal up the leak. No worky, so I purchased another Champion radiator to replace it.

I'll also be changing my heater core and thermostat while I have the coolant out.

I'm curious about using the cooling system flushes or just flushing out the system with a garden hose stuffed down the hole in the intake manifold where the thermostat housing is, while the radiator is out.

Are the cooling system flushes worth it?
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1968 C10 327, 3 speed manual, LWB stock height daily driver.


1968 C20 327, 4 speed manual, LWB stock height custom camper with heavy duty leaf springs rear, 50th anniversary edition. Hoping to press into daily drive status soon.

Last edited by lil hoodlum; 12-06-2024 at 03:07 AM. Reason: forgot extra info
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