Thread: Coolant evacuation.

Nice split on that tank.

Remember back in the day that the original black tanks would just let go along the seams without any apparent cause ?

I've had a couple of dodgy new tank caps too, it pays to check them, but the problem was they wouldn't hold pressure.

How do you check the expansion tank caps? Did you have oil in coolant? Coolant in oil? My coolant been leaking out as you know. I'm scared now after reading this that my leak is due to gasket which i spent so much time on and went into so much detail for.

Just opened my expansion tank cap after day and a half sitting there and there was still some pressuse in it. That's not usual.

When my head cracked 2 years ago it still ran fine but cooling system was pressurised with no leaks from the gasket itself , this time was similar except coolant was being pushed out and cap couldnt handle it - they are only designed to release air pressure.
Due to airlock coolant wasnt circulating properly so it got hot.

Sent from my GT-I9300 using AULRO mobile app

well mine has a brand new turner head in it so i do not even want to think about the head being cracked. my work is 6km away and i drove there and back three times. coolant temperature in the head stayed at 86-90C, the engine saver didnt come on so i didnt loose that much water. oil pressure was at 46psi.

one thing i noticed before the last drive is when i switched it on the oil pressure was at 48psi when i was idling in the carpark. I am not 100% on this but when i idled before it always used to sit on 28psi. not sure if this is straight from cold or not though, as when the temperature built up the oil pressure dropped again when i idled.

if i was to run the car this afternoon with the expansion tank cap off, if i was getting a pressurised cooling system, would i not see bubbles coming up from tank?

If the cooling system was being pressured and the cap off I would expect coolant to gush out as the gas has to go somewhere and take the coolant with it. That's how mine reacted when the head gasket went between the cylinder and the water gallery.

Originally Posted by theNEWT

If the cooling system was being pressured and the cap off I would expect coolant to gush out as the gas has to go somewhere and take the coolant with it. That's how mine reacted when the head gasket went between the cylinder and the water gallery.

Yep, exactly what mine did that last 2 times it went .

If mine goes again its out with the block for a resurface and an MLS gasket.