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Hello All,

I've just bought a 159 2.4 diesel.

I've read about the potential problem with the plastic coolant bleed valve blowing off and intend to replace it with a metal one.

Can someone tell me whereabouts in the engine it actually is ?

Many thanks !
 

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i was thinking about this, is it ideal not to change this plastic screw for a metal one? i was just thinking if the pressure in coolant built up for some reason then i would assume the 1st thing that would go for the safety of the engine would be this plastic screw? if you fit a metal one then chances are that something else may give way and could cost a lot. my dad's fiesta which i believe has a Mazada 1.2 unit has this pop valve in the cylinder head. the pressure built up for some reason and this pop valve started leaking steam and drops of hot coolant. by the time we turned back and parked on the driveway it popped and steam and a nice steady leak of coolant followed. the diagnoses was the water pump seals were gone and was leaking and letting air in.

maybe its a precautionary measure. open to other thoughts please if anyone think otherwise?

ta
 

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^^ interesting thought, but when my one let go, it was at 70 mph+ on the motorway. I consider myself lucky not to have warped the head.

Surely if it was intended as a pressure relief valve it would BE a pressure relief valve.

The attached photo shows the top of my engine with the plastic cover moved to one side. The bleed valve is the upper of the holes, as described. The pink stuff is all of the escaped coolant :eek:
 

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