pressure in header tank

[the green oval]

hi all!!! i have a defender 300 tdi it seems to be getting pressure in the header tank i have bleed the system 6-7 times to see if there's an air lock. but it seems to be flowing ok with no air at all but after running for 20 min or so the pressure is back. it not over heating thow it even has pressure if you leave it to cool down till the next day. an driving me
thanks steve

 

[Evans Garage]

Sounds like you have head/head gasket problems i'm afraid, there isn't anything else that can cause the issue !

 

[nrgserv]

seconded.

 

[the green oval]

would the water an oil not be mixing thow if head/ head gasket was gone ?

 

[GRATCH]

Not neccesarily. If the h/g has failed between a piston and waterway only, then it will pressurise the cooling system. If the h/g has failed between a piston, waterway and oilway then you will get emulsified coolant.

 

[nrgserv]

most bend along the lenth so hg goes between pots. there is a coolant gallery from the block which the gasses escape to so causing pressurisation.

 

[gemsdad]

i think ratty had this problem awhile back,turned out it was very small cracks in the cyl head,he even had it sniff tested but that came back negative.so it is not always the hgf.

 

[GRATCH]

True, but most people assume hgf = mayonaise coolant.
How ya doin GD? You up late or up early?

 

[the green oval]

thanks for the help everyone looks like a trip to the garage for me then

 

[nrgserv]

thanks for the help everyone looks like a trip to the garage for me then

why do people do this?

broken = garage

if we know where you are, mabe someone will help.
or even do it for a few beer tokens.

 

[the green oval]

why do people do this?

broken = garage

if we know where you are, mabe someone will help.
or even do it for a few beer tokens.

am in liverpool thanks for that mate

 

[the green oval]

why do people do this?

broken = garage

if we know where you are, mabe someone will help.
or even do it for a few beer tokens.

thanks for that nrgserv am in liverpool just off the east lancs road

 

[j the range]

if you want to have a go at doing it yourself, and want a hand i could help. if you want to pay a garage, i know a good landy indy that would take it on..

 

[the green oval]

thanks for the offer j but i think am gonna get a garage to do it as i will get some sort of guarantee with it. its a bit out my league i wouldn't mine getting a number for that landy place thow if you don't mined an once again thanks

 

[nrgserv]

thanks for that nrgserv am in liverpool just off the east lancs road

lol too far for me then!

but you got a recomendation for a garage!