I've just bought a set of thermostat flaps and I think I have everything i need apart from the thermostat and the return spring .I think I read somewhere that I don't need the return spring with the thermostat in the pic because it has spring .right or wrong ?????
I would do your best to source an original style bellows thermostat over one of those in the picture. Although rare they come up quite often on ebay for around £50. I understand the one you are showing defaults in the closed position if faulty. Allowing the possibility of overheating.
^go for this. The one in your pic is the wax thermostat - you'll have to saw the top off your existing bracket to fit it.
I use the wax thermostat - fitted to the OUTSIDE of the bracket to allow for maximum expansion. I keep hearing about these failing in the closed position, but no one has yet actually yet come to me with one that has failed? As it's not submerged in water - is it indeed likely to ever fail unless physically damaged?
Fit the spring, You can get the new style thermostat from GSF for around £25 if you use their 60% discount code. You dont need to cut the top of the bracket off, bit you do need to open out the slot in the top & file a slot off the bottom hot to allow proper fitment & opening. Or buy the bellows mentioned above, £45 is a good price for these. Or fit the flaps & spring but no thermostat...
Thanks, I'd ordered the new style one off vee wee before I saw these posts . I'll get a return spring as well and hope for the best. Might try and fit a "flaps closed light" aswell if pos . Cheers Cam
I was debating a light also - considered a microswitch with a lever on the shaft somewhere. If I was really clever I could try and work out something that only "energised" when the chokes were fully open, engine was running and the flaps closed. But I'm not so I'll leave it someone else to design....
I'll have a ratch through my box of switches and see if anything suitable falls out ,I'm sure it can't be impossible.
If the new ones fail they will fail flaps shut ... I couldn’t be bothered fitting lights ( that could also fail or switches that could also fail ) the bellows type is fail safe
Is it wrong to snigger ? Dumb question time, but I assume we are talking type 1 here? (I know less about type 4 than I do type 1, and that really is saying something!) And just while we’re on a roll with dumb questions, how can you tell if a type 1 even has a thermostat fitted, as I recall someone mentioned way back they don’t always?
Feel around the back of the fan shroud for the flap linkage. If you squint up under the right-hand cylinder head with a torch, you should see the thermostat. Flaps!
The top of the thermostat is just visible here, the brass ribbed cylinder with a wire going up. The white goop on the engine block is epoxy from where the dipstick tube pulled straight out of the block just after I fitted the new JK PP 1641. Not cold engine mayonnaise or worse stuff found near ribbed cylinders...
