Losing coolant 23 zl1 - Page 2

Coded4SS · 11-29-2023, 07:56 PM

Quote:

Originally Posted by Redmoe

Mine looks similar with 2300 miles

Ty for this! Makes me feel lil better

Redmoe · 11-29-2023, 08:10 PM

Quote:

Originally Posted by Coded4SS

Ty for this! Makes me feel lil better

I added some more details in that post, I think our coolant losses are similar. Mine seem to be slightly less but I have not tracked the car so that could make up the difference.

Redmoe · 11-30-2023, 07:25 PM

This doesn’t cover our model years but could be the issue: https://static.nhtsa.gov/odi/tsbs/20...09122-0001.pdf

triggerjerk · 11-30-2023, 08:40 PM

I have no coolant loss but the bottom corners of my hx also has grimey build up.
I am wondering if they naturally weep from the bottom and attract dirt? 1700 miles.

Redmoe · 11-30-2023, 10:13 PM

Quote:

Originally Posted by triggerjerk

I have no coolant loss but the bottom corners of my hx also has grimey build up.
I am wondering if they naturally weep from the bottom and attract dirt? 1700 miles.

Do you know if your lower overflow is at the mid point line when cold? Just curious if they are filling them to the line from factory.

triggerjerk · 11-30-2023, 10:53 PM

Quote:

Originally Posted by Redmoe

Do you know if your lower overflow is at the mid point line when cold? Just curious if they are filling them to the line from factory.

Actually, I just looked. The lower tank is well below the cold fill line.

taylorforschool@gmail.com · 11-30-2023, 10:59 PM

I just had my entire cooling system drain and filled at a pro shop and this is the case with mine as well. No harm no foul. It’s even an aftermarket system now. Just a little top off. Usually a seasonal thing I’ve noticed when it gets colder. Probably evaporation of sorts

Redmoe · 11-30-2023, 11:02 PM

Quote:

Originally Posted by triggerjerk

Actually, I just looked. The lower tank is well below the cold fill line.

I think these have a fair amount of evaporation since the lower overflow is not sealed. Even the manual states something along those lines.

OP maybe the ZL1 has more noticeable loss than your previous V8 due to the added heat of forced induction? Please update us when you get it back from the dealer.

triggerjerk · 11-30-2023, 11:06 PM

Quote:

Originally Posted by Redmoe

I think these have a fair amount of evaporation since the lower overflow is not sealed. Even the manual states something along those lines.

OP maybe the ZL1 has more noticeable loss than your previous V8 due to the added heat of forced induction? Please update us when you get it back from the dealer.

That is what I am thinking.
Can fluid be added directly to the lower chamber (if the top is full) without having to open the top cap as well and run the engine per the manual?

Redmoe · 11-30-2023, 11:45 PM

Quote:

Originally Posted by triggerjerk

That is what I am thinking.
Can fluid be added directly to the lower chamber (if the top is full) without having to open the top cap as well and run the engine per the manual?

When cold you can fill the lower tank via the little tube behind the main cap. The manual says to fill bottom to approximately half way, top should be all the way to the filler neck.

CalgaryZL1 · 12-01-2023, 04:10 AM

The lower tank has vent holes in it, which contributes to evaporation over time.

RUQWIKR · 12-01-2023, 05:07 AM

Quote:

Originally Posted by CalgaryZL1

The lower tank has vent holes in it, which contributes to evaporation over time.

...and why you may smell a bit of coolant smell underhood especially after running it hard.

Redmoe · 12-01-2023, 08:13 AM

Great information, thanks everyone!

Coded4SS · 12-01-2023, 11:03 AM

Ah this is some good info. I appreciate it all i never seen those holes. But how much evaporation is normal? Id think this would evap the same as my SS. Granted these cars do get pretty hot in the engine bay. So zl1 owners how much coolant do you normally go through?

I followed up with the dealer and waiting for their response today.

11-30-2023, 10:59 PM	#21
taylorforschool@gmail.com PKG4U Drives: 2018 ZL1 Join Date: May 2021 Location: Huntsville AL Posts: 631 View My Garage	I just had my entire cooling system drain and filled at a pro shop and this is the case with mine as well. No harm no foul. It’s even an aftermarket system now. Just a little top off. Usually a seasonal thing I’ve noticed when it gets colder. Probably evaporation of sorts __________________ 2020 Camaro LT1. Bought 10/2020 \| GM PERF. CAI \| GM Muffler Delete (Performance Exhaust 4” tips). \| SOLD 1/2022\| 2018 ZL1 Summit White \| Bought 1/2022 \| PDR, Recaros, Carbon Dash, WeaponX Hx System, Apex SM-10 in ZLE fitment w/PS4S Mods after Warranty “Imma keep it stock”

12-01-2023, 04:10 AM	#25
CalgaryZL1 Drives: 2020 Chevy Camaro ZL1 Join Date: Apr 2023 Location: Calgary Canada Posts: 1,486	The lower tank has vent holes in it, which contributes to evaporation over time. Attached Images

11-30-2023, 07:25 PM	#17
Redmoe Drives: 2022 Vivid Orange ZL1 Vert M6 Join Date: Jul 2017 Location: Az Posts: 71	This doesn’t cover our model years but could be the issue: https://static.nhtsa.gov/odi/tsbs/20...09122-0001.pdf

11-30-2023, 08:40 PM	#18
triggerjerk Drives: 2023 Camaro ZL1 Join Date: Jan 2016 Location: USA Posts: 404	I have no coolant loss but the bottom corners of my hx also has grimey build up. I am wondering if they naturally weep from the bottom and attract dirt? 1700 miles.

12-01-2023, 08:13 AM	#27
Redmoe Drives: 2022 Vivid Orange ZL1 Vert M6 Join Date: Jul 2017 Location: Az Posts: 71	Great information, thanks everyone!

12-01-2023, 11:03 AM	#28
Coded4SS Drives: 2020 1SS 1le Join Date: Apr 2019 Location: SO CAL Posts: 440	Ah this is some good info. I appreciate it all i never seen those holes. But how much evaporation is normal? Id think this would evap the same as my SS. Granted these cars do get pretty hot in the engine bay. So zl1 owners how much coolant do you normally go through? I followed up with the dealer and waiting for their response today.

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