As i said before.

Water problem PLEASE HELP?

The engine was from SMR.

For those of you who gave me help and advise thank's.

Ive changed the header tank cap and brought ay new stat witch i have'nt changed yet.
Now the problem as seemed to of gone, not looseing any water and all seem's ok!

How ever i have'nt drove the car hard or under any pressure, now here's wwere im at.

 

SORRY FOR THE GLITCH!

I have'nt drove the car hard since the problem, now im thinking it's because ive change the ECU's over could this be the reason why or not?

This is because the water only seemed to go overflow when i drove the car hard and when you drive off the boost its ok.

It's running 16PSI with just a Z4ECU nothin else what do you guy's think?

 

Coolant loss when running on boost could be an indicator of a headgasket issue - Get the cooling system chemical tested for the presence of CO.

 

Seem's to be HG failer may as well gat ready for a re-build.

Ive got two head's already witch have bin scimed off the original engine witch only coverd 500miles with a grand's worth of new bit's in it, would i need to get them checked again or would thay be ok to do ay HG job? on the engine witch is in the car at the mo? Bit of a daft question?

Probly not you may say
I re-built the original engine my self and this only failed because the crank was re-ground. Lol.