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Smiths Heater Valve


Peaks
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The heater valve on Vitesse is looking a bit sorry for itself and only opens occasionally when I try to operate it. 

Are all the heater valves available from the various suppliers and ebay of the same quality? I ask as I assume that by now Smiths no longer make them and they are a pattern part. 

Also, while I'm on he subject.... I've never been able to really operate the valve easily from the dash, with quite a lot of pressure required from the palm of my hand to close the valve. It's always been like that, and I've always accepted it, but is that normal? It's a MkII Vitesse by the way, not that I'd imagine the model makes much difference in this case. 

Thanks. 

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they are easy to strip down  first mark both cases witha felt pen so you know where they align 

drill out the pop rivet

rotate the two halves to disengage the "claws" thenyou can clean the valve plunger and diaphragm

some of your stiffness willbe from a rusty inner control cable especially where the open wound case runs through the heater air plenum 

and rain makes it all rusty inside , so i would disconnect the cable and pull the inner out to be greased and refitted 

Pete

 

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Thanks Pete, I'll probably buy a new one  as the valve is leaking coolant t around the claws.as you describe them. I'll certainly take the old one apart though, just to have a look to see how it all works. 

The operating cable is fairly smooth as I removed it and freed it up a while back. I guess it's just a characteristic of the valve. 

If all the valves do come from the same factory, as I suspect, then we in the Triumph world are lucky as the valves from our suppliers are around £22. A valve from other marque specialists that look exactly the same are anything up to £52. 

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6 hours ago, Peaks said:

If all the valves do come from the same factory, as I suspect, then we in the Triumph world are lucky as the valves from our suppliers are around £22. A valve from other marque specialists that look exactly the same are anything up to £52. 

I did replace mine when I bought the car 8 years ago, It was off e Bay and sold by an engineering company Ooop North and looked the same as the others on sale, so assumed he supplied other retailers?.

The seller recommended to leave the valve open when not in use. I have done this and also opened the valve every time I drive the car to give the valve and the matrix a run through.

Still ok, though others have had problems with them only lasting a year or so?.

Dave  

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2 hours ago, daverclasper said:

 

The seller recommended to leave the valve open when not in use. I have done this and also opened the valve every time I drive the car to give the valve and the matrix a run through.

Still ok, though others have had problems with them only lasting a year or so?.

Dave  

I do the same, I open the valve when I get between 1 & 2 kilometres from home and leave it open until I next take the car out

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All pretty manky, and the sealing face which the diaphragm mates too has corroded, so this one is beyond repair.

I suspect what was happening was that all the crud was keeping the diaphragm in the closed position no matter where the operating lever was. 

Anyway, I got the heater matrix opened up and cleaned out internally a while back, and with the new valve actually allowing water into it, it turns out that the heater in the Vitesse is actually very effective. Who knew?? All those years putting up with poor performance, assuming that they were all like that, and it was just an old car idiosyncrasy 🙄

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9 hours ago, Chris A said:

I can detect the warm/hot air rising and that is in a convertible with the roof down ♨️

Is that contributing to "global warming"?. Better not let Grumbling Greta find out!🤣

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  • 4 weeks later...

Comming back to Heaters and the valves. Any one know the size of the "O" ring seal (O/d-I/d and/or thickness dia/?) between the Valve and the Heater inlet?. It looks to be quite thick, shown as A147 on the (canley) part list. And 50 pence each, But with postage at around 3quid,? None of the ones in my "Little box of bits" are the right size. Best guess would be 1/2" (12,5mm id) and somewhere over 5mm thick? Whats left of the original has been quite substantial.

Pete

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1 hour ago, Pete Lewis said:

just cut a slice off some spare heater hose    that works well 

Pete

Looking at it? I do wonder if that is what has been done in the past, It is definitely rather "meaty", .

Right off to the "shed" for a ferret about and see what I have?. Probably Best if not Reinforced though?.

If Not. I`ll do as Colin suggested, and see what else I need potentially in the near future. I know I want some Window seals and runners etc;  So A Biggish Order could be on the Cards. Canley are currently On Holiday until Early July. (G)rimmers are twice the price!.

Pete

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3 hours ago, PeteH said:

Canley are currently On Holiday until Early July.

I know. The bu&&ers didn't mention that until I had ordered head studs on the 24th, then checked their website yesterday to find out where the order was as I needed them. They'll despatch them on July 5th when they return. Nice of them.

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12 minutes ago, Colin Lindsay said:

I know. The bu&&ers didn't mention that until I had ordered head studs on the 24th, then checked their website yesterday to find out where the order was as I needed them. They'll despatch them on July 5th when they return. Nice of them.

All this time off with lockdowns and furloughs and they close for holidays!!! When they get back will they all have to be quarantined as well.

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3 minutes ago, Badwolf said:

All this time off with lockdowns and furloughs and they close for holidays!!! When they get back will they all have to be quarantined as well.

According to their Facebook page they are camping in their Atlas classic in Cornwall 

Paul

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