should this be happening after the engine has warmed up?

[Paddy_g46]

ok as u may know iv been having probs with my cooling system recently, basically wen engine is cold i top it up to max then i run for half hour and wen i check the bottle the level is below minimum but wen i release the cap there is lots of pressure (should there be?) and wen i release the pressure it come back up to the top again, i have been told this means there is an airlock somewhere, also the small skinny return pipe to the bottel is barely trickling out liek as if the water isnt getting to the pump so cant be pumped back! i remember on my old clio it was like a water fall somign back ot the bottle now it is a splutering trickle! and the fan doesnt cut in until after it should, as in the engine gets warmer then it should b4 the fan starts up.

any ideas?

 

[Paddy_g46]

bump

 

[Paddy_g46]

bump

 

[sargeantinio]

sounds like you have an air lock put heater in hot position and run with cap off pumping the hoses till they all get hot and heater is hot then top up and replace cap should work if diesel there sould be a bleed screw on top hose

 

[Paddy_g46]

^ ok mate ill try that, is there onyl 1 bleed valve on the rt? if found the 1 on top of rad but thought there would be more?

 

[sargeantinio]

not sure if there are any on the petrol engines pal put heater in hot position in car start up and leave top off expansion tank pump all the hoses till they get hot the air should escape out of the expansion tank once all the hoses are red hot and the heater is blowing hot top up water in expansion tank and replace the cap should be ok then and make sure fan comes in and youve cracked it

 

[Matbrown]

also the small skinny return pipe to the bottel is barely trickling out liek as if the water isnt getting to the pump so cant be pumped back! i remember on my old clio it was like a water fall somign back ot the bottle now it is a splutering trickle!

This pipe is prone for blocking up, unclip it from the header and try blowing down it.



Mat.