The 75 and ZT Owners Club Forums - R75 diesel coolant lost when weather cold

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Devcore

24th November 2021 06:44

R75 diesel coolant lost when weather cold

Hello Everyone!

I just noticed my coolant is leaking somewhere near the waterpump, when the weather is below/near 0°C. It leaks about 1-3 dl than stops(depending on temperature). Can anyone give me some hints why its only leaking when cold?

Thank you

dave lincs

24th November 2021 07:25

The thermostat seal is the bit that often starts to leak on a diesel it's just on side of water pump

Mike Noc

24th November 2021 07:54

As is the O ring that seals the small coolant pipe in the thermostat housing, which is also a common leak point.

COLVERT

24th November 2021 09:02

It probably stops leaking as it warms up and the expansion closes the small gap that it's leaking from.

trikey

24th November 2021 09:06

Quote:

Originally Posted by COLVERT (Post 2909370)

It probably stops leaking as it warms up and the expansion closes the small gap that it's leaking from.

Either that or the heat from the engine is evaporating the water as its leaking.

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