Expansion Tank
#2
Join Date: Jan 2014
Location: Delaneys Creek,Qld. Australia
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#3
#4
Well I didnt miss what I didnt know I didnt have. The only reservoir my lump has is the one under the the left wing-fender-mudgaurd. Did not know there was originally another tank in the system.
#5
Join Date: Mar 2008
Location: Pacific Northwest USA
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Most commonly the tank on the side wall of the engine bay is called a "header tank". The header tank takes the place of the radiator tank on those cars where you actually add water/coolant directly into the radiator.
The one tucked up inside the fender, by the front wheel, is an 'atmospheric tank' / expansion tank/ recovery tank/overflow tank. It might be....I dunno....that Series II and earlier cars had an open cooling system and did not use such a device. Coolant expelled from the header tank merely went onto the ground.
Cheers
DD
The one tucked up inside the fender, by the front wheel, is an 'atmospheric tank' / expansion tank/ recovery tank/overflow tank. It might be....I dunno....that Series II and earlier cars had an open cooling system and did not use such a device. Coolant expelled from the header tank merely went onto the ground.
Cheers
DD
#7
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Location: Pacific Northwest USA
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I think one of them goes to a nipple on the filler neck at the front of the engine. The other, perhaps. goes to a steam pipe above the radiator?
Someone with an early Series III will come along and post a pic. (After 1982 or so there is a different tank arrangement and plumbing on the Series IIIs)
Cheers
DD
Someone with an early Series III will come along and post a pic. (After 1982 or so there is a different tank arrangement and plumbing on the Series IIIs)
Cheers
DD
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#10
Join Date: Jul 2012
Location: Walnut Creek, California
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#11
does it matter how many nipples or ports an expansion tank has?
just seal the unneeded ports with rubber plugs and clamps. No?
To me, the best expansion tank is the Series 3 tank.
I have a Series 2 tank and a Series 3 tank. The Series 2 is metal and is rusted.
The Series 3 is plastic and still good.
Second to those Jaguar tanks, the Volvo tanks of the 1970's are great, also plastic.
just seal the unneeded ports with rubber plugs and clamps. No?
To me, the best expansion tank is the Series 3 tank.
I have a Series 2 tank and a Series 3 tank. The Series 2 is metal and is rusted.
The Series 3 is plastic and still good.
Second to those Jaguar tanks, the Volvo tanks of the 1970's are great, also plastic.
#12
Jose has it right !
The Series 2 has a Pressurized Expansion Tank with one inlet from the pressurized side of the cooling system on the bottom and the outlet is above the pressure seal on the 15 PSI Cap with a line that is routed out through the wing wall to ground. It makes no difference how many inlets or outlets any tank has as long as it is designed to be pressurized and fits the space. There are a number of Aluminum tanks I would think might work and as Jose says, just plug any surplus fittings.
The Series 2 has a Pressurized Expansion Tank with one inlet from the pressurized side of the cooling system on the bottom and the outlet is above the pressure seal on the 15 PSI Cap with a line that is routed out through the wing wall to ground. It makes no difference how many inlets or outlets any tank has as long as it is designed to be pressurized and fits the space. There are a number of Aluminum tanks I would think might work and as Jose says, just plug any surplus fittings.
Last edited by Excalibur2012; 03-08-2021 at 07:34 AM.
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Jose (03-08-2021)
#13
Thanks Excalibur2012.
plugin cap kits are sold at auto parts stores. they come in many sizes. Also tiny clamps and universal expansion tanks.
my '65 S type was updated in the 1970's with a plastic Volvo 1800-E expansion tank, a long bottle with a radiator cap and a hose from the radiator neck port to the bottom of the bottle. These cars never had an expansion tank to begin with, so they spilled coolant on the ground when it got hot and expanded. The Volvo tank fits neatly in the limited space of the engine bay.
my point is, there is always a solution.
plugin cap kits are sold at auto parts stores. they come in many sizes. Also tiny clamps and universal expansion tanks.
my '65 S type was updated in the 1970's with a plastic Volvo 1800-E expansion tank, a long bottle with a radiator cap and a hose from the radiator neck port to the bottom of the bottle. These cars never had an expansion tank to begin with, so they spilled coolant on the ground when it got hot and expanded. The Volvo tank fits neatly in the limited space of the engine bay.
my point is, there is always a solution.
#14
#15
#16
XJ6 Series 2 Coolant Expansion Tank
Just ordered one of these ! Should be able to install it in my Series 2 XJ6C. If it is not fitted with a pressure cap, I may have to cut, lengthen & modify the tube to work !
https://www.ebay.com/itm/1L-Aluminum...72.m2749.l2649
https://www.ebay.com/itm/1L-Aluminum...72.m2749.l2649
Last edited by Excalibur2012; 03-11-2021 at 05:25 PM. Reason: Add Photo & clarification of workability.
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yachtmanbuttson (04-05-2021)
#17
The tank I ordered does not have a pressure cap which is needed for the Series 2 System. I have ordered one through eBay. I will cut the existing nozzle off and weld in the new pressure cap adapter (basically a Radiator Filler Nozzle). May or may not lengthen the tube to match the original Series 2 tank depending on what height I mount the tank.
Last edited by Excalibur2012; 03-12-2021 at 01:00 PM. Reason: Clarification
#18