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[Dr_X]

I did have a crappy water pump installed once by my garage....the bearings went and when I pulled it out to replace it found it had plastic impellers some of which had broken off........lasted 20K.

[Kevin Wood]

Water pump sounds like a good next step to me.

Are both upper and lower radiator hoses getting piping hot (too hot to touch) when the problem occurs?

If not, coolant circulation is poor, so might well be water pump.

[omega3000]

Water pump sounds like a good next step to me.

Are both upper and lower radiator hoses getting piping hot (too hot to touch) when the problem occurs?

If not, coolant circulation is poor, so might well be water pump.

All hoses are hot so are you saying its not the water pump then kevin 

[ScaniaV8]

I am with ENTWOOD.......check the expansion tank neck around the cap area to see whether there are numerous small cracks appearing... I had similar scenario to what you are experiencing and replaced the Expansion header tank bottle (new VX to me was £24.00) and bingo.......problem all solved and overheating sympton cured !!!  :-)

[omega3000]

I am with ENTWOOD.......check the expansion tank neck around the cap area to see whether there are numerous small cracks appearing... I had similar scenario to what you are experiencing and replaced the Expansion header tank bottle (new VX to me was £24.00) and bingo.......problem all solved and overheating sympton cured !!!  :-)

If the tank has these cracks like you say , would there not be water loss though ..ive not lost any water at all which is confusing .

Its the cheapest option by far though .

[Proz]

Im going to put my money on the waterpump ... maybe lost a fin or two and just not getting enough circulation to cool effectively ... still circulating enough to get every pipe nice and hot but not enough to cool it 

[dbug]

I'll go with water pump mate - don't get a Vx one unless you plan to take out a 2nd mortgage - a good quality pattern one is ok (QH or similar)

When you refill coolant run engine with cap off and heater set to HI to bleed air until stat fully opn. 

[Proz]

I am with ENTWOOD.......check the expansion tank neck around the cap area to see whether there are numerous small cracks appearing... I had similar scenario to what you are experiencing and replaced the Expansion header tank bottle (new VX to me was £24.00) and bingo.......problem all solved and overheating sympton cured !!!  :-)

If the tank has these cracks like you say , would there not be water loss though ..ive not lost any water at all which is confusing .

Its the cheapest option by far though .

I wouldnt go throwing parts at it hoping it cures it ... surely the cheapest option is to inspect the waterpump .
Doesnt cost anything to look 

[omega3000]

I am with ENTWOOD.......check the expansion tank neck around the cap area to see whether there are numerous small cracks appearing... I had similar scenario to what you are experiencing and replaced the Expansion header tank bottle (new VX to me was £24.00) and bingo.......problem all solved and overheating sympton cured !!!  :-)

If the tank has these cracks like you say , would there not be water loss though ..ive not lost any water at all which is confusing .

Its the cheapest option by far though .

I wouldnt go throwing parts at it hoping it cures it ... surely the cheapest option is to inspect the waterpump .
Doesnt cost anything to look 

Ok i will strip it out and see what its like then , is this a common problem then ? If the pump is the original on 12000 miles i guess its done its job 


I might need your assistance MARTIN 

[martin42]

im away friday and saturday,but back sunday

[omega3000]

im away friday and saturday,but back sunday

Ill start taking apart on sat and see how it goes mate , bring a hammer    

[martin42]

which 1 lol 

[adey2]

bigger the better id say lol

[omega3000]

Think im right in saying the pump can be changed without taking the plenum and cambelt guard off so just a case of getting all the other stuff around it off and out the way 

bigger the better id say lol

  Dont encourage me 

[symes]

you can remove pump without removing cam cover-but dont drop a bolt or it goes down inside=nitemare