3 replies to this topic

[orac69]

Hi,  1994 SPi, I have been having trouble with the heater, after following a load of threads here, Im now 99% sure the issue is with my heater core, so Im going to replace with one of the higher quality brass pipe ones..  

https://thecarheater...x-1992-onwards/

 

Anyway, while "servicing" the heater valve, the floating type which sits up by the wiper motor, I noticed that on operating the cable/plunger the gate which restricts the water flow doesnt fully close.  It looks like the valve is always allowing approx 20% of water through.   I dont think the plunger is jammed, seems pretty free, didnt want to force it, but I just wanted to check if this is normal or if I should replace the valve too.

 

If anyone knows Id appreciate it.

 

Thanks!

[MikeRotherham]

Is it the correct cable?

I'd start by checking the action of the hot/cold pull knob to see if it has full movement.

 

Assuming it's still working, there's a locking mechanism so you twist it a 1/4 of a turn before pulling and pushing then twist the opposite way to lock it.

Pull it out for heat and push it in for no heat. (On older models the knob works the other way round)

[orac69]

Yes, I dont have an issue with the cable, in/out etc - it was an observation with the valve removed from the car.

 

If you look down the pipe hole on the valve and actuate the little in/out lever manually, the plunger seems quite free, and I can see the flow hole opening / closing, but it only blocks the flow to about 80% when closed.  I wondered if this was normal is all.  I would have expected it to be 100% blocked/closed - hence my question!

[Ethel]

I think it's a short of sliding shutter (haven't got one, but have had similar on other vehicles), so it will be prone to silting up if it's not operated frequently. I don't see why you couldn't attempt to  clean the slider grooves with an angled  dental pick sort of thing. There's a similar valve if you're looking for an alternative & plenty of others on fleabay. That one looks like it's for a Bowden cable, with a loop on the end to go over the pin on the lever, but shouldn't be hard to botch modify.