Header tank cap leak

Busboy · 9th January 2019, 08:52

All of a sudden my header tank cap has started to leak. I have read somewhere that this is a common ageing fault. It does not matter how tight I screw it down it stil leaks, I obviously need a new one and can anybody point me to a supplier that can supply me with a new cap ASAP ? in the meantime has anybody tried a well proven bodge that can get me by in the mean time as I am loosing valuable OAT coolant on every journey I make.

suzublu · 9th January 2019, 09:07

1- make sure you're not overfilling the tank.
2- don't overtighten the cap as you just squash the seals, deforming them so they no longer seal
3- buy replacement viton seals from Jack, https://www.ebay.co.uk/itm/Rover-75-...frcectupt=true

Busboy · 9th January 2019, 13:50

New seals ordered from Jack, thanks for your help, very much appreciated

suzublu · 9th January 2019, 14:28

Quote:

Originally Posted by Busboy

New seals ordered from Jack, thanks for your help, very much appreciated

Pleasure Keith, just make sure you fit the seals as per Jack's instructions

gadget1960 · 9th January 2019, 14:52

Can only suggest ECP or German & Swedish, that's where I got mine from, and they had it in stock.

COLVERT · 9th January 2019, 15:49

Quote:

Originally Posted by suzublu

1- make sure you're not overfilling the tank.
2- don't overtighten the cap as you just squash the seals, deforming them so they no longer seal
3- buy replacement viton seals from Jack, https://www.ebay.co.uk/itm/Rover-75-...frcectupt=true

Item 1 on this post is VERY important.---

planenut · 9th January 2019, 20:06

Quote:

Originally Posted by Busboy

All of a sudden my header tank cap has started to leak. I have read somewhere that this is a common ageing fault. It does not matter how tight I screw it down it stil leaks, I obviously need a new one and can anybody point me to a supplier that can supply me with a new cap ASAP ? in the meantime has anybody tried a well proven bodge that can get me by in the mean time as I am loosing valuable OAT coolant on every journey I make.

Now tell me that you haven't allowed a mechanic near it please? the old way was to fill it to the neck, way too much over our MAX level.

9th January 2019, 08:52	#1
Busboy Loves to post 75 tourer (facelift) 2.0 CDTi Join Date: Sep 2014 Location: Gravesend Posts: 479 Thanks: 456 Thanked 55 Times in 39 Posts	Header tank cap leak All of a sudden my header tank cap has started to leak. I have read somewhere that this is a common ageing fault. It does not matter how tight I screw it down it stil leaks, I obviously need a new one and can anybody point me to a supplier that can supply me with a new cap ASAP ? in the meantime has anybody tried a well proven bodge that can get me by in the mean time as I am loosing valuable OAT coolant on every journey I make. __________________ One of the best of the last from the last of the best! Produced on Valentine's day 2005 - 8 weeks before the end.

9th January 2019, 13:50	#3
Busboy Loves to post 75 tourer (facelift) 2.0 CDTi Join Date: Sep 2014 Location: Gravesend Posts: 479 Thanks: 456 Thanked 55 Times in 39 Posts	New seals ordered from Jack, thanks for your help, very much appreciated __________________ One of the best of the last from the last of the best! Produced on Valentine's day 2005 - 8 weeks before the end.

9th January 2019, 09:07	#2
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,922 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	1- make sure you're not overfilling the tank. 2- don't overtighten the cap as you just squash the seals, deforming them so they no longer seal 3- buy replacement viton seals from Jack, https://www.ebay.co.uk/itm/Rover-75-...frcectupt=true

9th January 2019, 14:52	#5
gadget1960 Gets stuck in Rover 75 saloon Join Date: Dec 2018 Location: Maxton, Dover Posts: 519 Thanks: 183 Thanked 132 Times in 89 Posts	Can only suggest ECP or German & Swedish, that's where I got mine from, and they had it in stock.