Possible causes? Any insights will be appreciated. Coolant loss.

[Auditude437]

Hello everyone,

So ever since I bought my car brand new and went stage 3 BB TTE777 with my '21 TTRS, I've had a coolant loss problem. I replaced my thermostat, and head gasket but it still hasn't solved the leaking problem. The coolant loss is only more gradual now, not as quick. My shop ruled out the water pump since they mentioned it's fairly easy to spot if it was the cause. Do you think it might be because of a cracked block?

What do you guys think might be the cause of this coolant loss? Any insights or opinions will be greatly appreciated.

Thank you so much.

[DanMPower]

Do you smell any coolant when you pop the hood after a drive?

[Auditude437]

I don't smell anything distinct. No.

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[NapalmEnema]

Could try and find any pinhole leaks in a tube somewhere - if you don't smell after a drive it may just be getting out somewhere else.

[Auditude437]

Got it, I'll suggest it to my shop. Ty.

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[RMode]

A simple pressure test would reveal the leak(s).

How much, and how often, are you filling it?


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[Auditude437]

A simple pressure test would reveal the leak(s).

How much, and how often, are you filling it?


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I figured that as well but I did a pressure test at two different places (dealer and indie) and it didn't reveal anything. :(

Before replacing the head gasket and thermostat, from a full tank, the coolant needed be refilled every week so it didn't last long.... Now, the loss seems to be much more slower, gradual. The low coolant light sensor will come on at almost every drive but it doesn't always stay on.

[Alex D]

Could try to put a UV dye in the coolant system to help trace the source of the leak. The usual suspect is the water pump if you haven’t already checked that.

[RMode]

I figured that as well but I did a pressure test at two different places (dealer and indie) and it didn't reveal anything. :(

Before replacing the head gasket and thermostat, from a full tank, the coolant needed be refilled every week so it didn't last long.... Now, the loss seems to be much more slower, gradual. The low coolant light sensor will come on at almost every drive but it doesn't always stay on.

I’m wondering if you don’t have a leak at all, and instead, it needs better bleeding


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