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Coolant replacement procedure

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Old Jan 3, 2026 | 07:29 PM
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Default Coolant replacement procedure

Does anyone have the procedure to
drain and replace the coolant on c8 z06?

thanks
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Old Jan 4, 2026 | 09:13 PM
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What says the OM?
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Old Jan 4, 2026 | 09:35 PM
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Originally Posted by MKC8
What says the OM?
the OM only says the spec of the coolant and frequency, not how to replace. Btw no more OM in the glovebox these days.
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Old Jan 4, 2026 | 10:01 PM
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Originally Posted by Misty C8 Z06
Does anyone have the procedure to
drain and replace the coolant on c8 z06?

thanks
Im pretty sure I have this on my hard drive. When I next get on my computer, I’ll look.

It is an involved procedure amongst other things, requiring a vacuum pump to properly fill the system.
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Old Jan 4, 2026 | 10:05 PM
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Originally Posted by Mitchell_B
Im pretty sure I have this on my hard drive. When I next get on my computer, I’ll look.

It is an involved procedure amongst other things, requiring a vacuum pump to properly fill the system.
thanks in advance. I do have a vacuum pump kit with various connectors.

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Old Jan 4, 2026 | 10:29 PM
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following
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Old Jan 5, 2026 | 01:42 AM
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Originally Posted by Misty C8 Z06
Does anyone have the procedure to
drain and replace the coolant on c8 z06?

thanks
Check your PM
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Old Jan 5, 2026 | 02:35 AM
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It would be great if one of you folks could write a short how-to, so we'd know roughly what the precudere is : )

For instance, is filling and burping until it not longer accepts more fluid, then driving and refilling for a few more days a sufficient approach. I'm sure service manual would not recommend such a method since they don't have "multiple days to burp", but if it works, it'd be the best way for the owners with no specalized tooling.
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Old Jan 5, 2026 | 12:43 PM
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Originally Posted by Misty C8 Z06
the OM only says the spec of the coolant and frequency, not how to replace. Btw no more OM in the glovebox these days.
Internet search engines (like Google) can be your friend. They can find online downloadable OMs, too.
You could hire this guy....probably works cheap. "Don't fear the Repair" (Blue Oyster Cult)
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Old Jan 5, 2026 | 02:07 PM
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If you have to pump the pressure tester "forever" to get any pressure, it means there's a bunch of air still in they system that you're trying to compress. Once it's filled properly it doesn't take many pumps to get a good pressure reading. I found this when installing the V09 radiator. Running the car at 3000 rpm for 30 seconds then letting it idle and repeating a few times will help move any air through the system.
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Old Jan 5, 2026 | 02:23 PM
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Originally Posted by Mark9
If you have to pump the pressure tester "forever" to get any pressure, it means there's a bunch of air still in they system that you're trying to compress. Once it's filled properly it doesn't take many pumps to get a good pressure reading. I found this when installing the V09 radiator. Running the car at 3000 rpm for 30 seconds then letting it idle and repeating a few times will help move any air through the system.
I've also had a similar experience when I installed the additional radiator. I've pretty much done it how it was done on C5/6/7 Corvettes: fill it to the top, crank it, then start it while filling it back to the top, revving up 2K+ RPM at times, until it no longer accepts anything. Then I keep checking the level for the next few days after drives, and that's it.
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Old Jan 5, 2026 | 03:45 PM
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The OP asked about a Z06 but I'll post these service manual shots for a Stingray that someone else had posted. And some tech tips.
Attached Files
File Type: zip
Coolant drain and refill.zip (7.04 MB, 23 views)
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