peter and phil
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| posted on 30/1/05 at 07:51 PM |
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How to pipe up an XE engine to a Polo radiator on a westfield
Can anybody give any help with what pipes are required to fit the polo radiator into a westfield SEi. We are using an Xe engine.
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Stu16v
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| posted on 30/1/05 at 09:12 PM |
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Plumbing diagrams from 16v guru's SBD here
The pipes themselves can be sourced/made from silicon hose specialists, or rummaging through the stock at your local motor factor...
HTH Stu.
Dont just build it.....make it!
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NS Dev
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| posted on 30/1/05 at 11:00 PM |
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hmmmmmmmmmm, interesting!
I have no heater and was going to pipe the rear cyl head water outlet directly to the header tank, but I see Steve Broughton says don't connect
the heater and header tank hoses! Strange, as they are connected anyway at the union near to the water pump!!!
Now i am confused, why does he say this?? I guess it is because circulation to the rear of the head my not be optimum, but then I have seen a number
of cars where this outlet is blocked off with a core plug and has no circulation at all!!
Any ideas???
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cidersurfer
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| posted on 30/1/05 at 11:29 PM |
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quote:
Originally posted by NS Dev
hmmmmmmmmmm, interesting!
I have no heater and was going to pipe the rear cyl head water outlet directly to the header tank, but I see Steve Broughton says don't connect
the heater and header tank hoses! Strange, as they are connected anyway at the union near to the water pump!!!
Now i am confused, why does he say this?? I guess it is because circulation to the rear of the head my not be optimum, but then I have seen a number
of cars where this outlet is blocked off with a core plug and has no circulation at all!!
Any ideas???
Good question. I'll be interested in the answer to this one too. It's what I was thinking if doing.
shimming solid lifters is a job for a friend...
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ned
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| posted on 31/1/05 at 09:55 AM |
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I think as you say it's related to keeping good coolant flow and avoiding hotspots at teh rear of the head. In our race engine the heater outlet
is blocked, but the engine only runs for 30mins at a time max..
Ned.
beware, I've got yellow skin
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BMF
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| posted on 31/1/05 at 03:28 PM |
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I spoke to QED and they said just blank it off which is what I have done.
I had a pipe joiner to combine the 32mm pipe from the rad, the 25mm pipe from the manifold and the 15mm pipe from the header out of ali, then one 32mm
output to the waterpump. Cost £25 from Car builder solutions.
For hoses call Highbury hoses on 01283 217750 and they will make up what ever you want out of silicone for about 40% less than off the shelf SAMCO
hoses.
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NS Dev
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| posted on 31/1/05 at 06:22 PM |
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Would you think that I am ok to feed the header tank to the rear of the head, blank off the larger manifold water connection, feed the small manifold
"bleed" to the top of the header tank and feed the thermostat housing and water pump outlets to the top and bottom of the rad
respectively? This neatly takes care of all the connections and puts the header tank nice and near to the feed from the rear of the head.
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Stu16v
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| posted on 31/1/05 at 06:39 PM |
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Dont plumb the header tank into the back of the head. Reason being is that at revs, the water tends to 'backflow' into the header tank,
allowing air to be pushed back into the system, and cause overheating.
Some folk have got away with it by putting a small restrictor in the 'expansion tank to head' hose, to prevent backfilling, but then makes
the system painfully slow to top up.
Mine is similar to the SBD system. Rear of the head is blanked off, header tank is plumbed into bottom hose, as is the manifold connection (serious
bit of fabricationsoldering with copper pipes...). Manifold bleed is blanked off, with a bleed from the top of the rad soldered on and plumbed back to
header tank, as this is the highest part in my system. I use a cortina rad at present, and the fan only cuts in after lengthy periods in traffic. The
temp never goes past halfway otherwise, even during hard thrash on track days...
[Edited on 31/1/05 by Stu16v]
Dont just build it.....make it!
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NS Dev
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| posted on 1/2/05 at 08:51 AM |
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Cheers for that, very helpful thanks! I will route the rear of the head around to the water pump outlet, and do the Tee etc with soldered copper as
you said. Painted black it will look pretty neat.
I have plumbed in these engines before but not in sevens, and the pipework in my mantas etc left a little to be desired in terms of appearance!
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cidersurfer
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| posted on 6/2/05 at 12:31 PM |
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I can confirm that plumbing the header tank into the heater outlet backfeeds the header tank and pressurises it. I just did it as a trial! Bad idea,
good advice Stu... As usual... 
shimming solid lifters is a job for a friend...
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