coolant system flush on 1994 Vette
#1
Racer
Thread Starter
coolant system flush on 1994 Vette
So what is the best way to flush out the coolant system. It doesn't seem like the regular flush kit would work on a vette.
#2
Team Owner
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How much do you want to flush. If the hole system remove t-stat housing, both knock sensors, drain raditor, and remove inlet heater hose to the heater core. Let all old coolant drain out. Get garden hose and start run water though until its clear coming out
#3
Melting Slicks
A lot depends on the current condition of your coolant. If it's all brown, you'd be best to remove knock sensors etc, as previously mentioned. If the coolant is nice and green, you may not want to go to that extent. If so:
Remove the lower rad hose from the rad, drain and then re-attach. Remove the T-stat, and then re-install the T-stat housing to the block. Refill with clean water, and run the engine for a while. Drain and repeat. You can get a lot more water out of the block by removing the T-stat housing and using your (cleaned-out) shop vac to "push" air into the opening. Repeat this process a number of times. Once the water runs nice and clear, drain as much as you can. Install T-stat. Re-fill with distilled water and coolant. Use the air-bleed screws to remove air from the sytem.
Oh, and avoid getting your opti wet.
Remove the lower rad hose from the rad, drain and then re-attach. Remove the T-stat, and then re-install the T-stat housing to the block. Refill with clean water, and run the engine for a while. Drain and repeat. You can get a lot more water out of the block by removing the T-stat housing and using your (cleaned-out) shop vac to "push" air into the opening. Repeat this process a number of times. Once the water runs nice and clear, drain as much as you can. Install T-stat. Re-fill with distilled water and coolant. Use the air-bleed screws to remove air from the sytem.
Oh, and avoid getting your opti wet.
#5
Racer
Thread Starter
Thanks for the info
#9
Melting Slicks
You can also remove the thermostat and reinstall the thermostat housing. Remove the drain plug from the radiator and use a 5hp shop vac on "blow mode" and stick it right in the reservoir snout. This will blow all the coolant out of the block and radiator with clean filtered air. Works like a charm and is fast.
#10
Melting Slicks
#11
Melting Slicks
#12
Racer
Thread Starter
#13
Racer
Thread Starter
You can also remove the thermostat and reinstall the thermostat housing. Remove the drain plug from the radiator and use a 5hp shop vac on "blow mode" and stick it right in the reservoir snout. This will blow all the coolant out of the block and radiator with clean filtered air. Works like a charm and is fast.
#14
#15
Melting Slicks
#16
I may try that shop vac idea too
#17
When flushing the engine, do you need to use distilled water or can you use hose water? And how much would you expect to go through? I flushed 9 gallons of DI water through last night and there is still some light sediments and greenish color left.
#19
Racer