Hi there - does anyone know exactly what pressure the cooling system should hold before the filler cap releases it on 2.0Lt JTD Scudo?

I have a hiss and coolant escaping when engine at temperature - I'm trying to eliminate all options before paying for HG change...

Garage tested my system and it's at 28psi which seems high - they also say the flow through the radiator isn't as good as it should be.

All usual HG tests have been done - gas test of coolant, oil in water/vice versa, heaters staying hot etc

My suspicion is a minute hairline crack in head or HG which is just enough to build too much pressure and the rad cap is doing it's job by letting it escape....any other theories welcomed!

hi,
from memory it should blow by at @1.5 bar,
which is a little lower than you have,
there are probably optional higher release ones avaialble..!!,

1st though - I would get the RAD flushed.. no radweld type rubbish in there..??,

Charlie

Hi, did you ever find the cause of this? I have the same problem with my 2.0l JTD Scudo

MarcusGC said:

Hi, did you ever find the cause of this? I have the same problem with my 2.0l JTD Scudo

Click to expand...

3 months later they were looking for a new rad..
brakes a year later

Draw your own conclusions..

Head gasket? Cracked head?... guessing lol. I think I've got a cracked head, at most a small one. Going to try some kseal.