cooling system has no pressure

[daverclasper]

Hi everyone

 

I have a vitesse mk1 2ltre.

 

When the engine is up to temperature and I remove the rad cap, It does not have pressure and no hot water spurts out.

 

I have replaced with a new cap from Rare bits so assume is good.

 

No difference.

 

The engine does not overheat, though can get a bit above the center of gauge when idling in traffic on hot days.

 

No coolant loss.

 

Not a big issue I guess, though wondering why.

 

Any advice much appreciated.

 

Cheers, Dave 

[Pete Lewis]

dave  make sure the cap is the correct depth to seat on the base of the filler as if the washer doesnt seat you get no building pressure

there are different legnths available to suit rads with different stand off heights , from the bayonet rim to the washer seating

 

Pete

[Colin Lindsay]

I agree with Pete; unless you have gasket problems it’s probably an incorrect rad cap. Does the system refill when cold, or does the level drop then stay at the same?

[daverclasper]

Hi. Thanks for getting back with the cap info.

 

The expansion bottle seems to stay the same level, hot or cold engine.

 

I wondered about this a while back and I sucked the tube at bottle end to check for air leaks and it held pressure.

 

Cheers, Dave