Anti-freeze loss

rjgss · 03-27-2024, 06:59 PM

I’ve been losing anti-freeze from the reservoir but the top tank is full. I thought the tank was leaking so bought a new one and now after driving it a couple times the lower reservoir is empty but top is full. Nothing appears to be leaking but have no idea where it’s going. Any ideas?

WhiteMale · 03-28-2024, 08:17 AM

There are vent holes in that lower tank and some loss is there, IIRC. Top tank should be full, lower at the full mark, just top it up. As long as it's not white at the tail pipes or leaking under the car it shouldn't be much of a concern. Depending on frequency that youre topping it off...

arpad_m · 03-28-2024, 01:02 PM

The coolant mixture does evaporate through the vent holes, but not very quickly in my experience.

Just to be on the safe side, especially if nothing is dripping on the ground, check the underside of the oil cap and the dipstick for oil consistency, if you see whitish, frothy residue, you may have a head or head gasket issue and coolant consumed by the engine.

rjgss · 03-28-2024, 02:21 PM

I just replaced the tank so I’ll fill it half way and see what happens. Will check oil & plugs, has catch can. Old tank was leaking, as there was fluid below it but not now. Just had it dyno tuned and they never said anything about smoke or anything leaking, etc. thanks for help

03-27-2024, 06:59 PM	#1
rjgss Drives: 2016 Camaro SS Join Date: Sep 2023 Location: Mooresville, NC Posts: 11	Anti-freeze loss I’ve been losing anti-freeze from the reservoir but the top tank is full. I thought the tank was leaking so bought a new one and now after driving it a couple times the lower reservoir is empty but top is full. Nothing appears to be leaking but have no idea where it’s going. Any ideas?

03-28-2024, 01:02 PM	#3
arpad_m Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017 Location: East Tennessee Posts: 11,616 View My Garage	The coolant mixture does evaporate through the vent holes, but not very quickly in my experience. Just to be on the safe side, especially if nothing is dripping on the ground, check the underside of the oil cap and the dipstick for oil consistency, if you see whitish, frothy residue, you may have a head or head gasket issue and coolant consumed by the engine. __________________ 2018 Camaro 2SS — G7E MX0 NPP F55 IO6 735 rwhp \| 665 rwtq Magnuson TVS 2300 80mm pulley \| Kooks 1 7/8" LT headers \| JRE smooth idle terminator cam \| LT4 FS & injectors \| TSP forged pistons & rods JMS PowerMAX \| DSX flex fuel kit \| Roto-Fab CAI \| Soler 95mm LT5 TB \| 1LE wheels \| 1LE brakes \| BMR rear cradle lockout \| JRE custom tune 1100 - 1/30/18 \| 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 \| 3800 - 2/26/18 4300 - 2/27/18 \| 4B00 - 3/01/18 4200 - 3/05/18 \| 4800 - 3/14/18 5000 - 3/16/18 \| 6000 - 3/19/18

03-28-2024, 08:17 AM	#2
WhiteMale Drives: 23 ZL1 A10 Rapid Blue Join Date: Aug 2020 Location: MO Posts: 1,992	There are vent holes in that lower tank and some loss is there, IIRC. Top tank should be full, lower at the full mark, just top it up. As long as it's not white at the tail pipes or leaking under the car it shouldn't be much of a concern. Depending on frequency that youre topping it off...

03-28-2024, 02:21 PM	#4
rjgss Drives: 2016 Camaro SS Join Date: Sep 2023 Location: Mooresville, NC Posts: 11	I just replaced the tank so I’ll fill it half way and see what happens. Will check oil & plugs, has catch can. Old tank was leaking, as there was fluid below it but not now. Just had it dyno tuned and they never said anything about smoke or anything leaking, etc. thanks for help

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