We have a problem with an Yb engine getting hot while driving hard (track) but it is ok while driving normal or on idle.

The waterhoses are expanding when revving, but the head is pressuretested and the haed gasket is ok.

Any other ideas we could test?

Thank you/ Kezmo

 

had the same problem but mine chucked the water out still diagnozing

 

When you say getting hot, why do you think this, does it boil the coolant, push it out the expansion tank, or just relying on the gauge ?
What temp stat do you have in there ?
tabetha

 

we never drove the car on the red marking on the gauge.
We also never tested the gauge, but the thing that happens is that the hoses expand when you rev it, and we tested it against another engine and that engine didn't expand the hose.

Also tested if there were any exhausts in the expasion jar, and there wasn't.

 

The same thing happened to me, it was blown head gasket, It build up to much pressure, and break on hose. It was not hot, just high pressure.

 

would as well be my idea, broken head gasket, or air in the system....

 

but there are no exhaust fumes in the expansion "jar" and the block uses O-rings and an original head gasket.

It happend before we change the gasket to a new one, and the old one were not broken, but it still got hot.

Clogged radiator?

 

It can be a clogged radiator yes, are the fans working ? I doing a job on an Escos last week, only one of the fan was working, but it goes wrong way

 

more than likely to be the rad's blocked imo!

 

had the same problem many years ago on a sierra cossie in the early 90's after having it modded
had to replace all the hoses in the engine
tried that mate?