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Downgrading to earlier heater valve


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Purchased an earlier version heater valve which will be refurbished. My heater valve bracket is broken so I am going to fabricate one. I believe the older heater valve has narrower in/outlets. But are there any other adjustments that needs to be done or is this a straight swap? Thanks

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Should be a straight swap, as I recall the newer valve never fully closes so that a tiny trickle of coolant can flow through all the time and prevent the hoses from rotting and filling with rust and gunk.  If you run your heater every once in a while with the old style valve it will accomplish the same.

74 Golf

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The early valves I have and have seen are brass on brass- the later, larger style are not, and run less of a risk of sticking (and are easier to fix when they do)


If you have a large inlet heater core, you may have to make the hose that goes from the valve to the core, as BMW changed that hose size when they

changed the nipple size, and (as far as I've seen, anyway, double check realoem) there are no large-to-small and small-to-large hoses for that short

little stub. 

Not hard, just a bit tricky.




"I learn best through painful, expensive experience, so I feel like I've gotten my money's worth." MattL

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My 69 2002 uses the (original) early heater valve, early heater core, early outlet fitting on the back of the 72tii cylinder head and larger return pipe.


To do this you need a reducer between the return pipe and heater core.  IIRC, the seals for the early heater core/heater box top cover are NLA.







Jim Gerock

Ruby Red 73tii built 5/30/73 "Celeste"

Riviera 69 2002 built 5/30/69 "Oscar"

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