Heater hose connections, which way round?

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Heater hose connections, which way round?

Post by simmit » Fri Jun 24, 2016 5:09 pm

This numpty removed heater hoses to replace with new and now can't remember which way round they go.
Of the two bulkhead connections does the top one go to the cylinder head or does it go to bottom of the block?
Apologies for taking your time with my stupidity.



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Re: Heater hose connections, which way round?

Post by Tupperware » Fri Jun 24, 2016 6:34 pm

Are you talking SE6? I believe they are side to side on the SE5.
Assuming the heater stop cock /tap is on the "hot block" side can you work it out from that?
Top one to bottom of thermostat (via wet choke) I would hazard a guess from memory and as this pic confirms
heater pipe.jpg
heater pipe.jpg (260.49 KiB) Viewed 2215 times
If the pump has no or a blocked top spigot, the other lower pipe goes to the back of the water pump



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Re: Heater hose connections, which way round?

Post by Tupperware » Fri Jun 24, 2016 7:08 pm

hose.jpg
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hoses to.jpg
hoses to.jpg (40.82 KiB) Viewed 2204 times
Last edited by Tupperware on Fri Jun 24, 2016 7:18 pm, edited 1 time in total.



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Re: Heater hose connections, which way round?

Post by philhoward » Fri Jun 24, 2016 7:11 pm

Tupperware wrote:Are you talking SE6? I believe they are side to side on the SE5.
Given this post is in the Middlebridge section, I guess it's neither?

Strictly speaking it makes very little difference which way round they go. There may be a preferred way but in reality if the hoses don't give you a clue in terms of reach, then whichever way you want.


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Re: Go with the flow

Post by Tupperware » Fri Jun 24, 2016 7:35 pm

I missed the Middlebridge aspect! So no water pipe to carb as the choke on the 2.8 is electric. (Fuel injection on Middlebridge?)
The GW parts pdf illustration for the GTE/ GTC 2.8 SE6B/SE8B is the same as the SE6(a) parts pdf but I would amend my previous suggestion to; upper bulkhead hose to thermostat (which is on the water pump), lower hose to block.

I possibly agree swapping the hoses will have no bad effect - apart from a live/hot heater matrix when it is in the cold/off position
Last edited by Tupperware on Fri Jun 24, 2016 8:40 pm, edited 2 times in total.



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Re: Heater hose connections, which way round?

Post by philhoward » Fri Jun 24, 2016 7:54 pm

Didn't realise MB parts list was online? Must have missed it.


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Re: Heater hose connections, which way round?

Post by Tupperware » Fri Jun 24, 2016 8:17 pm

Last edited by Tupperware on Sat Jun 25, 2016 10:14 am, edited 1 time in total.



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Re: Heater hose connections, which way round?

Post by philhoward » Fri Jun 24, 2016 8:55 pm

Cheers - will add it to the Useful Links page. I hadn't come across that before.


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Re: Go with the flow

Post by scimjim » Fri Jun 24, 2016 11:17 pm

Tupperware wrote:I possibly agree swapping the hoses will have no bad effect - apart from a live/hot heater matrix when it is in the cold/off position
There isn't a valve on the SE6 system, the matrix is always hot (that's why they silt up less than the 5 system) - it's the flaps that prevent it being directed into the cabin.


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Re: Heater hose connections, which way round?

Post by Tupperware » Sat Jun 25, 2016 2:22 am

It would appear they reverted to a heater valve on the Middlebridge though
valve.jpg
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Re: Heater hose connections, which way round?

Post by simmit » Sat Jun 25, 2016 8:41 am

Thank you gentlemen, especially for the on-line parts catalogue.
So it's any way up then!



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Re: Heater hose connections, which way round?

Post by Tupperware » Sat Jun 25, 2016 11:13 am

philhoward wrote:Didn't realise MB parts list was online? Must have missed it.
I only found it on the GW site by looking behind the scenes - there is no link from the parts page / parent directory to the pdf !

The Middlebridge site down load location was via good old google



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Re: Heater hose connections, which way round?

Post by DARK STAR » Mon Jun 27, 2016 8:27 pm

GW's site is chaotic.
Not a lot of people know that the Coupé parts list is also online http://www.grahamwalkerparts.co.uk/PART ... _Parts.pdf
The link is of course on the Scimitar France site 8)


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Re: Heater hose connections, which way round?

Post by deiselden » Mon Jun 27, 2016 9:00 pm

Simmit, most car heater hoses are fitted bottom to top, Ie if pipes coming out of heater are one on top of the other, then on Essex engine top connection goes to lower connection usually water pump and lower one to connection on top of engine.



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Heater hose connections, which way round?

Post by simmit » Tue Nov 07, 2017 6:39 pm

Tupperware wrote:
Sat Jun 25, 2016 2:22 am
It would appear they reverted to a heater valve on the Middlebridge though
valve.jpg
Or did they?
Although the MB Parts Book shows a valve MB50 seems not to have one in the hose run. Rather, the Hot/Cold lever control cable appears to operates an airflow flap valve (see photo) is this typical?
Also, the flap valve has only 30 deg or so of movement even with cable disconnected. Would that seem reasonable?
I'm trying to improve the heating system.
MB-heater-cable.jpg
MB-heater-cable.jpg (168.02 KiB) Viewed 1003 times



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