Engine Coolant Circulation
Thread Starter
Instructor
Joined: Oct 2019
Posts: 193
Likes: 14
Engine Coolant Circulation
Hello everyone. I recently had to change out my ABS/EBCM in my 2009 Z06 and needed to move some coolant hoses out of the way for easy access. I got everything put back and refilled the coolant reservoir. When I started the car, it immediately started to cycle the coolant and pulling from the reservoir but at one point it appeared to have stopped. I see small little bubbles in the reservoir, the radiator fans turn on, I have squeezed/massage the coolant hoses, I have taken off the line from the driver side head and have blown into the reservoir, I have turned the heat all the way up on full blast, I have driven it around. Am i missing anything? Lol. The reason I’m asking is because my car gets hot really fast (around 7 minutes or less, it will get up to 190) and will continue to climb. This is not normal for my setup. I’ve been running this set up (Dewitt’s radiator/single fan/OEM Thermostat) for 2 years and have never had heat problems even after doing hard pulls. My guess is there is still air trapped in there? Any tips or tricks? Thank you!
Thread Starter
Instructor
Joined: Oct 2019
Posts: 193
Likes: 14
I’ll try to get a vaccum tool because I feel like those procedures listed I basically performed. I didn’t rev the car 2,000-2,500 but I drove it to and from the shop and that didn’t work. Thank you.
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Joined: Sep 2013
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From: Cape Coral, Florida
Safety Car
Joined: May 2006
Posts: 3,691
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From: Potomac MD
I just use a Plews suction gun (its like a big syringe) on the lower overflow tank cooler hose (its like 5/16 ID line) and just suck the fluid that way. It takes about 6-8 pulls (after initial fill) but it gets me to 98% there and I just top off as time goes on.
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Safety Car
Joined: May 2016
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From: Erlanger, Kentucky
I have found that if you remove the top hose going to the coolant reservoir, elevate it as much as you can, put an appropriately sized funnel into the hose, and then use that to fill the system, it will almost completely fill it and have almost no trapped air.
Just keep filling until the level stops going down, remove the funnel from the hose, the put the hose back on the reservoir quickly to prevent the coolant from coming back out.
Start the car and the top off the reservoir is necessary.
This works because it fills coolant to both sides of the thermostat and allows trapped air to be pushed out.
Just keep filling until the level stops going down, remove the funnel from the hose, the put the hose back on the reservoir quickly to prevent the coolant from coming back out.
Start the car and the top off the reservoir is necessary.
This works because it fills coolant to both sides of the thermostat and allows trapped air to be pushed out.
Burning Brakes
Joined: Nov 2014
Posts: 965
Likes: 234
From: Whitesburg Kentucky
I have found that if you remove the top hose going to the coolant reservoir, elevate it as much as you can, put an appropriately sized funnel into the hose, and then use that to fill the system, it will almost completely fill it and have almost no trapped air.
Just keep filling until the level stops going down, remove the funnel from the hose, the put the hose back on the reservoir quickly to prevent the coolant from coming back out.
Start the car and the top off the reservoir is necessary.
This works because it fills coolant to both sides of the thermostat and allows trapped air to be pushed out.
Just keep filling until the level stops going down, remove the funnel from the hose, the put the hose back on the reservoir quickly to prevent the coolant from coming back out.
Start the car and the top off the reservoir is necessary.
This works because it fills coolant to both sides of the thermostat and allows trapped air to be pushed out.
Last edited by Last 1; Aug 7, 2023 at 09:28 AM.