V70R help please, 1999

parker13 · Sep 24th, 2020, 18:25

Hope some one can advise me, The valve on the cap of the expansion bottle activates and the coolant flows out although at this point the car isn't overheating but is at it's normal temperature, took it in to a garage and they replaced the thermostat and said a pipe in the wing going to the expansion tank was full of scale so they they cleaned the pipe out, also had to replace the thermostat housing as it cracked whilst they were working on it, just under £250 later and it's still doing it, a few weeks before that they replaced the radiator and the heater matrix, could it be related?, hoping some one can help.

taiwan740 · Sep 24th, 2020, 18:30

Have you tried it with a new radiator cap? Same effect?

If you take the radiator cap off from cold, fire the engine up, does coolant bubble up everywhere?

parker13 · Sep 24th, 2020, 18:43

Thanks, will do that and see if the water flows when it's at operating temperature, I did wonder if the valve in the cap was releasing before it should as the cars not over heating, probably did six, seven miles in it before the valve opend so I would of thought if the water wasn't flowing it would of over heated before then,

Luxobarge · Sep 24th, 2020, 19:37

As above, if it's the old grey cap it's a known fault, often changed as a matter of course as a precautionary measure for the newer style green cap. I did mine, although there were no problems with the old grey one.

taiwan740 · Sep 24th, 2020, 22:18

Quote:

Originally Posted by parker13

Thanks, will do that and see if the water flows when it's at operating temperature, I did wonder if the valve in the cap was releasing before it should as the cars not over heating, probably did six, seven miles in it before the valve opend so I would of thought if the water wasn't flowing it would of over heated before then,

No, from cold. Don't open it when its at operating temperature.

Replace the radiator cap anyway, they are about a fiver from ebay, and then fire the car up with the radiator cap off. if it starts bubbling violently straight away, then its head gasket. Doubt it though sounds like your cap is just knackered.

parker13 · Sep 25th, 2020, 10:53

Thanks for the replies, it has got the green cap but I'll replace it and hope for the best,

parker13 · Oct 3rd, 2020, 18:05

so far so good with the new cap

Sep 24th, 2020, 18:25	#1
parker13 New Member Last Online: Jul 21st, 2023 19:23 Join Date: Feb 2013 Location: Gloucestershire	V70R help please, 1999 Hope some one can advise me, The valve on the cap of the expansion bottle activates and the coolant flows out although at this point the car isn't overheating but is at it's normal temperature, took it in to a garage and they replaced the thermostat and said a pipe in the wing going to the expansion tank was full of scale so they they cleaned the pipe out, also had to replace the thermostat housing as it cracked whilst they were working on it, just under £250 later and it's still doing it, a few weeks before that they replaced the radiator and the heater matrix, could it be related?, hoping some one can help.

Sep 24th, 2020, 19:37	#4
Luxobarge Premier Member Last Online: Today 22:43 Join Date: Jan 2011 Location: Horne (Nr. Horley)	As above, if it's the old grey cap it's a known fault, often changed as a matter of course as a precautionary measure for the newer style green cap. I did mine, although there were no problems with the old grey one. __________________ Some people are like Slinkies, they serve no useful purpose but they still bring a smile to your face when you push them downstairs.

Sep 24th, 2020, 18:30	#2
taiwan740 Member Last Online: Aug 20th, 2023 15:06 Join Date: Sep 2019 Location: Milton Keynes	Have you tried it with a new radiator cap? Same effect? If you take the radiator cap off from cold, fire the engine up, does coolant bubble up everywhere?

Sep 24th, 2020, 18:43	#3
parker13 New Member Last Online: Jul 21st, 2023 19:23 Join Date: Feb 2013 Location: Gloucestershire	Thanks, will do that and see if the water flows when it's at operating temperature, I did wonder if the valve in the cap was releasing before it should as the cars not over heating, probably did six, seven miles in it before the valve opend so I would of thought if the water wasn't flowing it would of over heated before then,

Sep 25th, 2020, 10:53	#6
parker13 New Member Last Online: Jul 21st, 2023 19:23 Join Date: Feb 2013 Location: Gloucestershire	Thanks for the replies, it has got the green cap but I'll replace it and hope for the best,

Oct 3rd, 2020, 18:05	#7
parker13 New Member Last Online: Jul 21st, 2023 19:23 Join Date: Feb 2013 Location: Gloucestershire	so far so good with the new cap

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)