scootz
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| posted on 15/10/10 at 12:39 PM |
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VX XE Engines... Again... Sorry!
At present my cooling system has a bulkhead tank that is connected to the large water outlet at the back of the head (under the dizzy mounting point)
and a small pipe running from the top of the tank to the top of the rad.
I'm thinking that the large outlet would probably have been to the heater matrix in the original configuration???
My Q is... can I delete the large outlet with a core-plug and just run a rad mounted tank for overflow / expansion?
Would cut down on the number of pipes running about the engine bay, but would it affect cooling performance?
Cheers!
It's Evolution Baby!
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scootz
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| posted on 15/10/10 at 12:43 PM |
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This photo probably explains it best... it's the outlet for the lower of the two blue hose that I would consider core-plugging (depending on what
the enlightened think!).
[img][/img]
It's Evolution Baby!
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blakep82
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| posted on 15/10/10 at 12:43 PM |
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yep, i've just blanked mine off. the outlet is for the heater, and the return goes back to the bottom hose
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scootz
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| posted on 15/10/10 at 12:45 PM |
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Cheers Blake! 
It's Evolution Baby!
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blakep82
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| posted on 15/10/10 at 12:46 PM |
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whats the braided hose to the bottom of the dizzy about?!
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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scootz
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| posted on 15/10/10 at 12:51 PM |
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Dunno... not got that far with my investigations yet! 
Anyone have any suggestions?
It's Evolution Baby!
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MikeRJ
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| posted on 15/10/10 at 01:31 PM |
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Braided hose is the external oil hose used to "fix" the GM heads when they go porous.
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NS Dev
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| posted on 15/10/10 at 02:08 PM |
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as above, braided hose is porous head fix, and yep, blank the heater outlet off, just make sure you have some sort of bypass flow for when stat is
shut if you are running a stat. (usually from inlet manifold to bottom hose)
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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scootz
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| posted on 15/10/10 at 02:24 PM |
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Thanks gents!
It's Evolution Baby!
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blakep82
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| posted on 15/10/10 at 02:39 PM |
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ooh, a bypass, of course. is it allowed to put a small hole in the thermostat itself?
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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westy turbo
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| posted on 15/10/10 at 03:53 PM |
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just sleve it with the tube as we said to your previus thread,and like said above,if not planning a heater,no need for the side head hose
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blakep82
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| posted on 15/10/10 at 05:02 PM |
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seems the air bleed thingy on top of the thermostat housing on mine is on the cylinder head side of the thermostat, so i'm going to use that as
the bleed
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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scootz
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| posted on 15/10/10 at 05:13 PM |
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Turns out my head already has the 'fix' Westy.
It's Evolution Baby!
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westy turbo
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| posted on 15/10/10 at 05:47 PM |
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thats good news then
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NS Dev
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| posted on 15/10/10 at 06:57 PM |
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Hi Scootz, just to clarify re. the water hoses, if you don't have a heater, all you "need" is a top hose from the stat housing to
the rad, and a bottom hose from the bottom of the rad to the water pump, plus a bleed from somewhere near the top of the engine, pref on the inlet
side (all manifolds I have ever come across have a small (5/16" outlet on the top at the front) to the top of the rad if you are running
without a header tank.
The only issue with this setup, is that there is not enough flow when the stat is shut, and you'll get local boiling in the head (I had this
with mine, no problems with the engine, just a funny noise when the stat isn't open, took AGES to track it down!!! ), a lot of the westfield
guys drill a small hole or two in the stat, which is fine, or alternatively most inlet manifolds also have a bigger (1/2" ish) water outlet at
the front underneath. Mine is blanked off, but if you run this to the bottom hose it gives a bit of bypass flow whan you dont have a heater.
I have a header tank as I am using a polo rad (no built in header) which is simply a "stepped" tank built into the top hose, which acts
both as a header and a swirl (de-aeration) pot, and the bleed from the inlet manifold is fed into it near the top.
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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NS Dev
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| posted on 15/10/10 at 07:01 PM |
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here's the gist:
 
header tank 1
[Edited on 15/10/10 by NS Dev]
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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scootz
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| posted on 15/10/10 at 07:12 PM |
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Perfect! Thanks a million!
If you have one... could you post up a snap of the other side showing the bleed set-up?
Thanks again!
It's Evolution Baby!
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NS Dev
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| posted on 15/10/10 at 09:38 PM |
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don't have a pic but should be able to get one on sunday
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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scootz
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| posted on 16/10/10 at 12:16 AM |
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You're a star!
Ta!
It's Evolution Baby!
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scootz
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| posted on 16/10/10 at 04:22 PM |
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Couple more Q's whilst I'm at it...
The larger outlet on the side of the head in pic goes to oil catch tank... can I just blank the other off?
 
Aaaand... would this be what you would call the 'round' tooth belt?
Ta muchly... as always!
It's Evolution Baby!
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martyn_16v
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| posted on 16/10/10 at 07:41 PM |
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Yes and yes
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scootz
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| posted on 16/10/10 at 08:21 PM |
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Cheers!
And bugger... I've just realised I've put the rocker cover back on and have forgotten to fit the breather plate I modded! Oh well, gives
me something to do in the morning! 
It's Evolution Baby!
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scootz
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| posted on 18/10/10 at 06:19 PM |
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quote:
Originally posted by NS Dev
Hi Scootz, just to clarify re. the water hoses, if you don't have a heater, all you "need" is a top hose from the stat housing to
the rad, and a bottom hose from the bottom of the rad to the water pump, plus a bleed from somewhere near the top of the engine, pref on the inlet
side (all manifolds I have ever come across have a small (5/16" outlet on the top at the front) to the top of the rad if you are running
without a header tank.
The only issue with this setup, is that there is not enough flow when the stat is shut, and you'll get local boiling in the head (I had this
with mine, no problems with the engine, just a funny noise when the stat isn't open, took AGES to track it down!!! ), a lot of the westfield
guys drill a small hole or two in the stat, which is fine, or alternatively most inlet manifolds also have a bigger (1/2" ish) water outlet at
the front underneath. Mine is blanked off, but if you run this to the bottom hose it gives a bit of bypass flow whan you dont have a heater.
I have a header tank as I am using a polo rad (no built in header) which is simply a "stepped" tank built into the top hose, which acts
both as a header and a swirl (de-aeration) pot, and the bleed from the inlet manifold is fed into it near the top.
I am running a stat.
I checked my manifold and I do indeed have the 5/16th outlet as described. I'm happy enough to tap into the bigger outlet below it and T into
the bottom hose. If I did this, then should I still run a hose from the smaller outlet to the top of the rad, or would that be overkill?
It's Evolution Baby!
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scootz
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| posted on 23/10/10 at 04:17 PM |
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Going to stick largely with what's there (how novel!).
Changed the rad though which throws up a fresh challenge!
On the original set-up, there was a small inlet / outlet on the top rail of the tank... this connected to the top outlet on my coolant tank (see
diagram below).
Image deleted by owner
The new rad doesn't have such an inlet / outlet - so where do I route the pipe from the top outlet in the coolant tank to now?
Top hose just pre-rad, or bottom hose pre / post pump?
Cheers!
It's Evolution Baby!
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NS Dev
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| posted on 25/10/10 at 06:10 PM |
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sorry, only jst seen the post!, never did get chance to get photos, but looks like yr sorted.
Just pipe the "spare" outlet from the header tank to the 5/16 outlet on the inlet manifold, perfect, that way it self bleeds the head
nicely.
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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