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| 8 & 10 cyl Bristol cars Type 407 onwards - restoration, repair, maintenance etc |
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24-06-09, 01:27 PM
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407 heater valve
Hi Bristolers,
My heater control valve, which is under the bonnet (hood), attached to the heater matrix box is leaking when switched off. I have spoken to BCL and Brian does not know what car it came from. It is a Smiths and I cannot see it being made for just Bristol. I have tried Sports Car supplies and sent them 'photos but they say it is not from an MGB or Triumph which was Brian Marrelli's thought. Any help would be appreciated as driving around with the heater full on is not fun in this weather. Thank you in advance, Nick Nicholas K Challacombe Last edited by Kevin H; 23-03-21 at 11:25 AM. 
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24-06-09, 01:51 PM
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407 heater valve
Nick,
Try loading photo up to web site so we can ll take a look and perhaps someone will recognise it's origins. Clyde
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24-06-09, 02:03 PM
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Quote:
I take it Brian doesn't have any? (which is a bit of a worry) If it's the same as the 408-411 then it's similar to those used on the Astons, but unfortunately not quite the same (different mounting style). However, it will be the diaphragm that has perished and those valves do come apart, so in a worst case scenario you could buy one for a DB6 and use it's innards to renovate your valve. Kevin
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24-06-09, 02:11 PM
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This could be what you need Canley Classics - New Catalogue - BODY AND FITTINGS - Spitfire / GT6 Heater
I mean the valve!
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24-06-09, 02:38 PM
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407 heater valve
If your 407 is similar to my 408 try Daimler or Rover.
If you put a hose clamp on the hose meantime it would save driving in your swimwear! Alternatively some BL cars fitted a manual valve on the head for isolaton.
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24-06-09, 04:07 PM
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407 heater valve
Thanks Kevin,
Tried that route but the 407/8 has two controls. Brian does not have any and indeed does not have a clue as to which car they came from. I even spoke to Brian May but the state of the 407 he has just obtained for spares is too far gone. I will attempt to upload but will send to you I think as I am still a bit clueless. From a muggy 24.5C. But sunny. Nick
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24-06-09, 09:04 PM
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Photos uploaded - please see below
posted by Kevin Howard on behalf of Nick
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24-06-09, 09:33 PM
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I have a few photos (see below) of the valve on a 408 and a 411. It appears that on the 408 (green car) that there is only one cable. On the 411 that is certainly the case. So maybe the valve on the 407 was different from the later V8 cars.
Whatever you do don't undo the screws which hold the heater valve bracket to the heater box - the nuts behind are NOT retained! Incidentally, I have just been through the parts list for the 408-410 and I can't find that valve! Kevin Last edited by Kevin H; 07-04-15 at 03:02 AM.
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24-06-09, 09:46 PM
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407 heater valve
From a brief look at the photo and my 1963 Alvis TD21, the valve on the
Bristol and the Alvis look to be the same, except the Alvis valve is on the right side . It has the flange to body and same outlet. I believe that Red Triangle at Kenilworth may have stock - I recall they were advertising " repros" of one models heater valve a while back Mike O
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24-06-09, 11:19 PM
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This second cable on Nick's valve is puzzling me. I can't think why it would be required, because there's only one valve. I can only guess that they didn't use the same solid cables on the 407. The point being that the solid core control cable is able to push the valve actuator as well as pull it.
Nick, are you absolutely sure that lower cable is connected to the valve? I have attached some detailed photos of a valve from an Aston. I suspect the internals are interchangeable. From memory I think the original one which came off my DB6 had a separate diaphragm spring, but if you take yours apart you should be able to see whether the diaphragm with the retained spring will work as a replacement in your valve body. You might be able to buy that diaphragm separately, but even if you can't do that, you can buy the Spitfire/GT6 valve for circa £20 and just use the parts. Let us know how you get on. Kevin
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25-06-09, 09:20 PM
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Thank you all for your help, it just shows how wonderful these Forums are.
ACCS Martin Barns emailed me to say he had a new one in stock! It is the correct one with two cables and a rod. One cable is the heater control and the other is demist. Whilst he was on he informed me he stock all glass including 411 heated rear screens, all suspension,gearbox,axles etc.. Why I did not ask him is that I thought he only did the yank parts. Anyway well done Martin. contact 020-72789786 or brisparts@aol.com Thank you for your help, ideas and warnings. Nick
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27-06-09, 09:00 AM
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407 heater valve
£36.00 plus VAT, but at least I know it is the right one.
When I asked a Triumph specialist he said that his only had one cable to it. So I left it, he was asking £28.00 I thought better safe than sorry, after all Martin supplies them to Bristol cars, he also supplies them with glass he says! Thank again fot all your help. Nick
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28-06-09, 01:13 PM
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Nick, can you take a nice close up photo (or 2) of your valve before you fit to the car and post them here (or send them to me) and we shall see if we can identify it. It could of course be unique to the Bristol 407. Kevin PS. large photos.
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28-06-09, 02:45 PM
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407 heater valve
Hi Kevin,
* I did try that route as I pointed out in my first mailing, the Ebay one that is but the trouble was the demist controls. I have not yet received the part but when I do*I will take part numbers and photograph, a bigger size as a luddite, what is the next size 640x640 ? * It should fit a 408 and at a guess a 409. * Nick * * Nick Challacombe. Home phone
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28-06-09, 02:45 PM
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| Nick Challacombe |
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This message has been deleted by Kevin H.
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28-06-09, 02:52 PM
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Quote:
Richard
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28-06-09, 11:10 PM
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407 heater valve, eBay
Hi Richard, Not completely certain but UK eBay item 290326979175 for
a Sunbeam Alpine looks pretty close. I'm looking at the fitting to the heater matrix, which is the O-ring type with flange, position of control cable and the other water connection. The Sunbeam one (and all others advertised) do however have a pressed steel cover on the control cable side rather than the original die cast version, maybe when sprayed black it will look OK. Otherwise I might try and fix the original die cast cover to the new valve as that part of mine is OK, it's the other side that has corroded away. Confirmation later when my sister in UK procures it and ships it to NZ... Further to earlier posts regarding the limiting straps on the rear axle of the 405 and other 2 litres.... I used some similar width tie down strapping rated at 1 ton, cut to length, after a few trips in the NZ mud I'm sure they will look fairly original... Stuart
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02-07-09, 11:20 AM
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407 heater valve
Hi all,
In my thanks to all who helped me with the heater valve, I said that ACCS supplied glass to Bristol cars. Toby Silverton has spoken to me and said that he had indeed had a couple of screen from ACCS to cover a shortfall but that was all. I hope that clarifies the situation. Toby S says it is his intention to hold all parts for every Bristol ever made. Nick
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02-07-09, 01:47 PM
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Quote:
Quote:
I thought we are talking about 407 heater valves! Has he bought some of those from ACCS as well? Kevin
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