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Coolant Leaking - Need Advice

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#1 rubdub


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Posted 26 December 2017 - 01:41 PM

Hey guys, 


So I've a pretty bad coolant leak at the moment. Usually after commuting back and forth to work for two days (about 40 miles) I'll have to top up my coolant again if not sooner than that! and some mornings I'll come down and there is a pool of coolant under the car.


All the expansion tank is bowed it's not leaking. I know there was a leak in the thermostat housing, but I've just changed the gaskets and the leak is still happening from somewhere else.


It seems to be pooling at the bottom right (facing the car) of the gearbox sump. Here is a pic for reference - https://ibb.co/e0fzH6


Could this be from the water pump? Or where else should I be checking?


Thanks in advance!



#2 FlyingScot


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Posted 26 December 2017 - 02:24 PM

Model and year would help...your mention of expansion bottle implies MPi?

Best way I have found over the years is to clean off the engine and gearbox and blow a little talc on the suspect areas, fire her up and leave to warm up looking for the tracks caused by the coolant leaking. Pictures don’t really help as the coolant runs along surfaces.
Clean it up and go from there.


#3 minidaves


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Posted 26 December 2017 - 02:24 PM

water pump expansion tank or a hose

#4 ukcooper


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Posted 26 December 2017 - 03:49 PM


or if its Mpi rad cap expansions cap not working

Edited by ukcooper, 26 December 2017 - 03:50 PM.

#5 rubdub


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Posted 26 December 2017 - 07:51 PM

Yep, it's an MPI. I'll give that a go.


Thanks guys! 

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