Coolant Loss from Header Tank

TCH6710 · Mar 16th, 2019, 16:01

Hi,

I have noticed some coolant has escaped from the header tank past the cap on my Diesel V70. There is some collecting around the base of the cap and some has sprayed onto the auxiliary belt tensioner. Any ideas why it might be doing this? There is no oil in the coolant and the engine runs fine.

The car has done 310000 miles and needs a new intercooler and air con condenser but I don't want to get these done if there is something wrong with the engine.

Thanks

TCH

ITSv40 · Mar 16th, 2019, 16:43

The system is pressurised, so I would change the cap.

Cookeh · Mar 17th, 2019, 08:34

As above, cap has failed. Very common issue, that is thankfully very cheap and easy to fix!

It is possible, if it's been spraying for some time, that you'll have to change the tank too. Looking at around £8/£5 for the cap (Volvo/PFV) and £40/£18 or so for the tank (Volvo/PFV).

TCH6710 · Mar 18th, 2019, 15:48

Thanks for all the replies I will get a new cap ordered.

TCH

Mar 16th, 2019, 16:01	#1
TCH6710 Junior Member Last Online: Sep 15th, 2023 15:27 Join Date: Jan 2009 Location: Rushden	Coolant Loss from Header Tank Hi, I have noticed some coolant has escaped from the header tank past the cap on my Diesel V70. There is some collecting around the base of the cap and some has sprayed onto the auxiliary belt tensioner. Any ideas why it might be doing this? There is no oil in the coolant and the engine runs fine. The car has done 310000 miles and needs a new intercooler and air con condenser but I don't want to get these done if there is something wrong with the engine. Thanks TCH

Mar 16th, 2019, 16:43	#2
ITSv40 VOC Member Last Online: Yesterday 22:32 Join Date: Mar 2008 Location: Northampton	The system is pressurised, so I would change the cap. __________________ 2001 V40 2.0lt Sport lux - Daily Driver. 174k miles. 2003 C70 2.4 GT Convertible - Garage Queen. 65k miles. http://www.neptuno6benagil.com

Mar 17th, 2019, 08:34	#3
Cookeh Premier Member Last Online: Sep 14th, 2022 17:04 Join Date: Jan 2018 Location: Derbyshire	As above, cap has failed. Very common issue, that is thankfully very cheap and easy to fix! It is possible, if it's been spraying for some time, that you'll have to change the tank too. Looking at around £8/£5 for the cap (Volvo/PFV) and £40/£18 or so for the tank (Volvo/PFV). __________________ 1995 Volvo 850 T5 Estate (Manual)

Mar 18th, 2019, 15:48	#4
TCH6710 Junior Member Last Online: Sep 15th, 2023 15:27 Join Date: Jan 2009 Location: Rushden	Thanks for all the replies I will get a new cap ordered. TCH

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