XJ6 & XJ12 Series I, II & III 1968-1992

Radiator non-standard?

Old 06-19-2019, 05:58 AM
Andy T.'s Avatar
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Default Radiator non-standard?

I have recently bought a Series 3 XJ6 4.2 here in Thailand. It is right hand drive (as suits this country). The car was bought as a non-runner and some of the cooling hoses are missing or possibly incorrectly connected.

On all pictures from manuals, parts books and internet searches I can find, the expansion tank has the two small hoses that exit the front top of the expansion tank running forward towards the radiator. One connects to the pipe which then runs across the front bulkhead and into the manifold. The other to a union at the top of the radiator.

On my car, the radiator does not have a union on the left hand side, but there is one on the right! This union was not connected to anything, and there was no hose connected to one of the small expansion tank unions.

I am assuming that I need to make up some pipework to connect these together, which should logically give me an equivalent circuit to the standard. I would appreciate comments from forum users if you think this is right. Has anyone any idea why my radiator might be different to standard? Perhaps it is a replacement from the original and is from a different model which is otherwise the same as the normal XJ6? Any suggestions would be welcome.

In the picture above, I think the hose is connected to the wrong union on the expansion tank. I think it should be the RHS union that connects to the pipe that runs across the front bulkhead.

Union on right hand side of radiator that I think needs to be connected back to the expansion tank (LHS unon on tank).

Second question on the hoses I think I have worked out but will ask as well: there is a hose running from the water pump which is connected to the union exiting the bottom of the manifold about halfway along. I think this is wrong and that it should run to the throttle body, then another pipe out of the throttle body and into the manifold. Can aynone confirm?
Old 06-19-2019, 10:30 AM
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in my 1984 XJ-6, the left hose from the expansion tank goes down into the left side of the radiator, through the plastic shroud.

the right hose from the expansion tank connects to a steel line through the bulkhead, which then comes out on the opposite side where another hose connects to the steel line and then to the intake manifold.
Old 06-20-2019, 01:17 AM
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Thanks for the confirmation about which of the two small hoses from the expansion tank connect to what. It would appear that my radiator is different to standard, so I think all I need to do is run a hose to the union on the right hand side to make the equivalent connection to normal layout.
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