itsawindupuk
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| posted on 21/5/13 at 08:48 PM |
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heater bypass valve
Hi guys, I feel my duratec mgb needs a heater and I want to use a valve like this one, but does anyone know why it has 4 ends to it rather than 2? And
if so what goes where?
http://www.caterhamparts.co.uk/product.php?id_product=333
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adithorp
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| posted on 21/5/13 at 08:53 PM |
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The clue is in the name. 
Feed and return to the engine and feed and return to the heater. When closed it "bypasses" the heater and just feeds back to the engine.
When open ti feeds hot water through the heater and back through the valve to the engine.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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ken555
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| posted on 21/5/13 at 09:12 PM |
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Cheaper to look for one as a London Taxi TX2 Heater Control Valve
Or use an electrical one off a Ford Ka/Puma from a scrap yard.
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PeteS2k
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| posted on 21/5/13 at 09:42 PM |
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quote:
Originally posted by ken555
Cheaper to look for one as a London Taxi TX2 Heater Control Valve
Or use an electrical one off a Ford Ka/Puma from a scrap yard.
Watch-point if using a Ford electrical one (I've got a Fiesta one on my car, which I think is pretty much a common Ford part) - it works by
pulsing a 12V signal to provide the variable temp setting. I just use it as an on/off though - 12V is off, 0V is on (if I've got that the right
way round!)
[Edited on 21/5/13 by PeteS2k]
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britishtrident
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| posted on 22/5/13 at 07:09 AM |
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You can use a simple 2 connection valve as long as you provide an alternative path for the by-pass flow.
To give an alternative path for the by-pass yYou can use 2 Tee pieces linked together i.e.. one in the heater flow and one in the heater return
joined by a hose between the centre leg of the Tee.
VW and Audi used a simple 2 connection valve -- very cheap on eBay
AUDI 80/90/COUPE/QUATTRO HEATER VALVE 171819809E NEW | eBay
The plastic Tees sold for the coolant water connection on LPG conversions are ideal as they are cheap and are stepped to accomodate differe
bores of heater hose.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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Not Anumber
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| posted on 22/5/13 at 09:03 AM |
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Are the VW valves electrical or mechanical /
If these valves are electrical at £ 7.50 a go it would be worth using 2 of them switched through a relay so water would flow only through the heater
or through the bypass.
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britishtrident
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| posted on 22/5/13 at 11:19 AM |
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quote:
Originally posted by Not Anumber
Are the VW valves electrical or mechanical /
If these valves are electrical at £ 7.50 a go it would be worth using 2 of them switched through a relay so water would flow only through the heater
or through the bypass.
Simple mechanical cable. for a better view see HEATER VALVE NEW FOR VW CADDY SCIROCCO GOLF MK1 CABRIOLET TRANSPORTER T25 LT
80 | eBay
You really don't need to make it over complex anyway the 2 Tee method works fine.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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