Black Header Tank

Teflon · 8th April 2019, 11:03

My current header tank is painted black, which looks fine, however it does suffer from the occasional chip and I'm forever re-touching it.

With this in mind, I've recently acquired a black header tank in very good condition

. One thing though: The pressure cap on the black tank is rated at 100, whereas the cap on my current tank is 140.

So my question: are there any issues with retrofitting a black tank that I should be aware of? I'm guessing for starters it should only be used with the lower rated cap - any thoughts? Engine is 2.0 V6 on an 03 plate.

Cheers,

Cliff

Fusilier · 8th April 2019, 11:06

Quote:

Originally Posted by Teflon

My current header tank is painted black, which looks fine, however it does suffer from the occasional chip and I'm forever re-touching it.

With this in mind, I've recently acquired a black header tank in very good condition

. One thing though: The pressure cap on the black tank is rated at 100, whereas the cap on my current tank is 140.

So my question: are there any issues with retrofitting a black tank that I should be aware of? I'm guessing for starters it should only be used with the lower rated cap - any thoughts? Engine is 2.0 V6 on an 03 plate.

Cheers,

Cliff

Cliff

I have got a black header tank fitted to the ZTT, and not had a problem with it, and it definitely better than the grubby original which was fitted

Stu

Teflon · 8th April 2019, 12:55

Cheers Stu, it should certainly look nicer than the painted one I've currently got fitted

. I was just pondering the significance of the differing cap pressures

Cliff

Dorset Bob · 8th April 2019, 13:30

This might help explaining.

I also understand the the black tanks have an overflow pipe fitted.
My V6 is a Cowley car, but is a late one so is fitted with the dirty looking yellow one.

Teflon · 8th April 2019, 14:17

Thanks. So reading that, am I right in assuming it should be safe (preferable even) to continue with a 140 cap on the black tank?

Cliff

Oh, and yes, it does have an overflow pipe connected.

stevestrat · 8th April 2019, 15:46

Perfectly safe to use a 140 cap. The 100 caps were used on petrol models until 2000 then the 140 previously only used on diesels was used as standard across all models.

Teflon · 8th April 2019, 17:20

Thanks. That's re-assuring

.

Cliff

trikey · 8th April 2019, 18:46

The only difference is the addition of the black colour in the plastic, nothing else has changed.

T-Cut · 8th April 2019, 18:55

Become a header tank guru: https://the75andztclub.co.uk/forum/s...d.php?t=245285

If you can't see all the photos, try this version: https://the75andztclub.co.uk/forum/s...d.php?t=271894

TC

Teflon · 8th April 2019, 19:25

Wow, many thanks for that! That's some excellent research you've done

. I've had a quick skim through, but will read through again tomorrow when I can spend a bit more time absorbing all the info.

Who could have guessed that a "simple" cap and tank could be so complex.

Thanks again,

Cliff

8th April 2019, 11:03	#1
Teflon This is my second home Lagoon 2.0 V6 75 Conn SE Saloon Join Date: Nov 2006 Location: Chertsey Posts: 5,203 Thanks: 2,825 Thanked 2,920 Times in 1,570 Posts	Black Header Tank My current header tank is painted black, which looks fine, however it does suffer from the occasional chip and I'm forever re-touching it. With this in mind, I've recently acquired a black header tank in very good condition . One thing though: The pressure cap on the black tank is rated at 100, whereas the cap on my current tank is 140. So my question: are there any issues with retrofitting a black tank that I should be aware of? I'm guessing for starters it should only be used with the lower rated cap - any thoughts? Engine is 2.0 V6 on an 03 plate. Cheers, Cliff __________________ No. 4 of 6

8th April 2019, 12:55	#3
Teflon This is my second home Lagoon 2.0 V6 75 Conn SE Saloon Join Date: Nov 2006 Location: Chertsey Posts: 5,203 Thanks: 2,825 Thanked 2,920 Times in 1,570 Posts	Cheers Stu, it should certainly look nicer than the painted one I've currently got fitted . I was just pondering the significance of the differing cap pressures Cliff __________________ No. 4 of 6

8th April 2019, 13:30	#4
Dorset Bob Senior Citizen Rover 75 2.5 Connoisseur SE,Chrysler 300C,124 Spider, Daytona 955i,Honda XL250 & Royal Enfield 650GT Join Date: Feb 2008 Location: The Kingdom of Wessex Posts: 6,976 Thanks: 2,391 Thanked 2,685 Times in 1,686 Posts	This might help explaining. I also understand the the black tanks have an overflow pipe fitted. My V6 is a Cowley car, but is a late one so is fitted with the dirty looking yellow one. __________________ Let the good times roll............

8th April 2019, 14:17	#5
Teflon This is my second home Lagoon 2.0 V6 75 Conn SE Saloon Join Date: Nov 2006 Location: Chertsey Posts: 5,203 Thanks: 2,825 Thanked 2,920 Times in 1,570 Posts	Thanks. So reading that, am I right in assuming it should be safe (preferable even) to continue with a 140 cap on the black tank? Cliff Oh, and yes, it does have an overflow pipe connected. __________________ No. 4 of 6

8th April 2019, 15:46	#6
stevestrat This is my second home ZT260 #243 (resting) Join Date: May 2010 Location: Prestonpans Posts: 22,478 Thanks: 650 Thanked 4,624 Times in 3,358 Posts	Perfectly safe to use a 140 cap. The 100 caps were used on petrol models until 2000 then the 140 previously only used on diesels was used as standard across all models. __________________ Steve T4 Location Map

8th April 2019, 17:20	#7
Teflon This is my second home Lagoon 2.0 V6 75 Conn SE Saloon Join Date: Nov 2006 Location: Chertsey Posts: 5,203 Thanks: 2,825 Thanked 2,920 Times in 1,570 Posts	Thanks. That's re-assuring . Cliff __________________ No. 4 of 6

8th April 2019, 18:46	#8
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,767 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	The only difference is the addition of the black colour in the plastic, nothing else has changed. __________________ Lest we forget..

8th April 2019, 18:55	#9
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	Become a header tank guru: https://the75andztclub.co.uk/forum/s...d.php?t=245285 If you can't see all the photos, try this version: https://the75andztclub.co.uk/forum/s...d.php?t=271894 TC Last edited by T-Cut; 8th April 2019 at 18:57..

8th April 2019, 19:25	#10
Teflon This is my second home Lagoon 2.0 V6 75 Conn SE Saloon Join Date: Nov 2006 Location: Chertsey Posts: 5,203 Thanks: 2,825 Thanked 2,920 Times in 1,570 Posts	Wow, many thanks for that! That's some excellent research you've done . I've had a quick skim through, but will read through again tomorrow when I can spend a bit more time absorbing all the info. Who could have guessed that a "simple" cap and tank could be so complex. Thanks again, Cliff __________________ No. 4 of 6