V6 leak

ballymenaman · 17th September 2018, 15:55

Has anyone had any issues with the engine temperature sender leaking on a V6? I have a small puddle of coolant in the engine 'V' and there looks to be a salt-like deposit around the sender area. The metal part of the sender itself also has a greenish colour to it - kind of like you'd get with a weepy copper pipe. The thermostat was replaced on the car a couple of years ago so is unlikely to be leaking.

Also, can the sender be replaced without having to start dismantling things?

Thanks.

Lovel · 17th September 2018, 16:21

Quote:

Originally Posted by ballymenaman

Has anyone had any issues with the engine temperature sender leaking on a V6? I have a small puddle of coolant in the engine 'V' and there looks to be a salt-like deposit around the sender area. The metal part of the sender itself also has a greenish colour to it - kind of like you'd get with a weepy copper pipe. The thermostat was replaced on the car a couple of years ago so is unlikely to be leaking.

Also, can the sender be replaced without having to start dismantling things?

Thanks.

Sounds quite typical. Here’s recent visit to my shed. Full timing belt change along with the thermostat and temp sensor items also being changed at same time. Can’t comment on whether changing the sensor can be done insitu though as I tend to take the inlet manifolds off to inspect and renovate the o-ring seal bores for the thermostat and other plastic pipes. Btw the sensor has a fibre washer fitted on it’s underside which doesn’t come supplied with a new one and could easily be overlooked in my opinion.

chris75 · 17th September 2018, 18:49

Quote:

Originally Posted by ballymenaman

…. The thermostat was replaced on the car a couple of years ago so is unlikely to be leaking.

.

I really wouldn't take that as a given

Lord of Hog · 18th September 2018, 08:08

Copper oxidises green just like iron oxidises red and aluminium oxidises white. The warm and sometimes damp environment under the bonnet is pretty much a guarantee that this will happen to at least some degree.

If you've got coolant in the V then have a look at that thermostat and associated pipework. Mop up all the damp stuff and then see if the dried up bits seem to lead anywhere. Remember that water runs in everything but straight lines!

SD1too · 18th September 2018, 08:08

Quote:

Originally Posted by chris75

I really wouldn't take that as a given

I agree with Chris. Your thermostat housing ‘O’ ring could easily have started leaking after a short period of time and the evidence readily disperses increasing the possibility of an incorrect diagnosis.

Simon

17th September 2018, 15:55	#1
ballymenaman Avid contributor 75 Contemporary SE 2.5 V6 Auto, Rover 45, classic mini and E Niro Join Date: Oct 2012 Location: Ballymena, Northern Ireland Posts: 239 Thanks: 25 Thanked 19 Times in 17 Posts	V6 leak Has anyone had any issues with the engine temperature sender leaking on a V6? I have a small puddle of coolant in the engine 'V' and there looks to be a salt-like deposit around the sender area. The metal part of the sender itself also has a greenish colour to it - kind of like you'd get with a weepy copper pipe. The thermostat was replaced on the car a couple of years ago so is unlikely to be leaking. Also, can the sender be replaced without having to start dismantling things? Thanks.

18th September 2018, 08:08	#4
Lord of Hog Gets stuck in Rover 75 2.5 V6 in Wedgwood Blue Join Date: Dec 2015 Location: Felbridge, East Grinstead Posts: 982 Thanks: 250 Thanked 294 Times in 206 Posts	Copper oxidises green just like iron oxidises red and aluminium oxidises white. The warm and sometimes damp environment under the bonnet is pretty much a guarantee that this will happen to at least some degree. If you've got coolant in the V then have a look at that thermostat and associated pipework. Mop up all the damp stuff and then see if the dried up bits seem to lead anywhere. Remember that water runs in everything but straight lines! __________________ Conformity is not morality. Consensus is not truth.