New/old header tank

[Jacketee]

Hi going to fit a header tank and I don't want a new posh aluminium one just one from the breakeryard. Also where do the pipes connect to. I presume tee into top hose and where do you put the other. Cheers all.

[Goldstar]

Welcome Jacketee. For various historical reasons expect some banter about this topic. Have you tried using the search function to find previous posts in the topic? Also Grampian Stags have a website. On the technical page there are (at least there were ) 2 installations with details and pics.
cheers
paul

[Tdafforn]

I used an old landrover one. I am runing a rover v8 so may be slightly different to the TV8. Works well, just had to fabricate some mountings from some aluminium strip.
tim

[dasadrew]

...For various historical reasons ....

just to correct the typo - hysterical reasons.

[NeilR]

Merc W124 with original stainless 21psi cap.

10mm fed into lower part of lefthand radiator side tank & into top hose with 8mm pipe / tail.

[richardthestag]

searching this site for header tank will be your best friend and worst enemy

[DZP]

Hi Jacketee,
The Grampian Stags website details installation of the Mercedes header tank that I used.

http://www.grampianstags.net/headertank.htm

Den

[Wheelz]

My preferred way of plumbing in a header tank is to connect the lower feed of the tank into a new port halfway down on the left side of the radiator (obviously not the easiest way though). The top/inlet to the tank should connect to the filler point of the rad by replacing the filler stopper with a union/elbow of some sort. Then the system is filled/topped up entirely via the header tank pressure cap. A level sensor to warn of a low level of coolant is very desirable too. Block off the old Mk2 expansion tube, and then thankfully the bottle becomes redundant.

[KOY 23]

My preferred way of plumbing in a header tank is to connect the lower feed of the tank into a new port halfway down on the left side of the radiator (obviously not the easiest way though). The top/inlet to the tank should connect to the filler point of the rad by replacing the filler stopper with a union/elbow of some sort. Then the system is filled/topped up entirely via the header tank pressure cap. A level sensor to warn of a low level of coolant is very desirable too. Block off the old Mk2 expansion tube, and then thankfully the bottle becomes redundant.

WOW! The first revelation of 2024, Chris has admitted that the 100’s or 1000’s of header tanks he has sold, are not as he would have preferred.
Many of us have plumbed the feed from HT into low down into the radiator tank rather than than the heater feed? as originally advocated by you Chris. I never took much notice of the exact plumbing as I knew it was a compromise of ease of fitment against performance.

[Jeff]

My preferred way of plumbing in a header tank is to connect the lower feed of the tank into a new port halfway down on the left side of the radiator (obviously not the easiest way though). The top/inlet to the tank should connect to the filler point of the rad by replacing the filler stopper with a union/elbow of some sort. Then the system is filled/topped up entirely via the header tank pressure cap. A level sensor to warn of a low level of coolant is very desirable too. Block off the old Mk2 expansion tube, and then thankfully the bottle becomes redundant.

[Wheelz]

Shakespeare would have been be proud of you Jeff! (or should it be Shagspeare?).

[Wheelz]

I never took much notice of the exact plumbing as I knew it was a compromise of ease of fitment against performance.

My Sunbeam header tank is plumbed into the rad as factory standard, and looks so neat

But not many Stag owners are too keen on pulling the radiator to modify it, when the (****) Mk2 expansion bottle can so quickly and effectively be replaced by a header tank the other way. Both mine are still plumbed in that way for convenience and working just fine, and I have seen many other types of tank plumbed that way too.

[Rumbo]

This is what I did. Purchased a universal expansion tank on E-Bay, modified the stag radiator and the expansion tank is now is the highest point in the system where fluid is added.

I even have an overflow tank where the expansion tank pressure cap flows to (this overflow tank sits in the original battery space along side the windscreen washer bottle as I moved the battery to the boot )

Expansion Tank sml.jpg