bitsilly
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| posted on 23/9/10 at 11:14 AM |
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5VY plumbing.
Can anyone help!!
AFAICS the coolant goes in at the bottom of the engine next to the oil filter, and comes out above the starter motor.
So connect the bottom (cooler bit?) of the radiator to the input, and the outlet to the top of radiator?
Next bit! The oil cooler has a pipe coming from underneath, (the other one is connected with original R1 hose) Is this the inlet or outlet? Where
should that be run to?
Lastly, there is a small bore pipe coming from the metal exit pipe fitting above the starter motor. Why, and what do I do with it!
Thats it I hope, if anyone can help, I'll then try and figure how to connect my old header bottle, and the small bore pipe at top of
radiator.
Cheers
Ed.
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A1
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| posted on 23/9/10 at 11:23 AM |
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doesnt it go in just under the sprocket, then come out the top of the heads? or am i thinking too old?
is the small pipe coming out the heads and just a couple of mm dia? this goes onto the auto choke.
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bitsilly
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| posted on 23/9/10 at 11:34 AM |
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Yep it seems to go in under the sprocket, but there is a fixed pipe from there which exits next to the oil filter.
Which raises another question, there is another narrow bore pipe from that fixed pipe! What happens with that!
Sorry about all the questions, but I really don't want to muck it up!
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ko_racer
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| posted on 23/9/10 at 12:34 PM |
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Not sure if you've seen it but this is from workshop manual:
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bitsilly
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| posted on 23/9/10 at 03:03 PM |
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Very useful thanks,
It looks like I'm right about the main in and out.
Also that radiator feeds system from bottom.
It also looks like the lower pipe on the oil cooler is an output so I guess goes to the top of radiator.
It then looks like the lower small bore pipe is joined to top of radiator, and also connected through another assembly and then to other small bore
pipe?? (A1, I am still trying to figure out where the auto choke is or if I have one, but you could be right).
Does the pipe in the background top return flow to rad from the thermostat?
Thanks guys.
[Edited on 23/9/10 by bitsilly]
[Edited on 23/9/10 by bitsilly]
[Edited on 23/9/10 by bitsilly]
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adithorp
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| posted on 23/9/10 at 03:22 PM |
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From memory mine is plumbed...
Thermostat housing to rad' top inlet.
Bottom rad outlet to bottom of engine, pump inlet.
Oil cooler outlet T'd into top hose (bottom hose may also do.
Bleed pipes from thermostat and rad T'd togather and into top of expantion bottle. Bottom of expantion bottle T'd into top hose (this
would be better into bottom hose but was easier to go to top).
Small bore pipe from behind sprocket to throttle body and then to back of stat (T piece removed).
It's been plumbed that way for over 2 years and works fine. I'm using a VW globe type expantion bottle. Coped well with 90'c temps
for 1 1/2hours in city centre, rush hour traffic in Italy this year. Mine runs cool at times and I think it's because of the oil cooler
circulating back via the rad'; Therefore cooling despite the stat being shut. It might be better going into the bottom hose with the oil cooler
outlet?
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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adithorp
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| posted on 23/9/10 at 03:29 PM |
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In the top picture the rad bleed comes to a T with the return from the throttle body auto choke ("another assembly" and then down to the
small bore return to the bottom. The feed to the throtle body come from below the thermostat.
Radiators should always feed hot from engine in at top, cold return to engine from bottom.
adrian
[Edited on 23/9/10 by adithorp]
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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bitsilly
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| posted on 23/9/10 at 04:03 PM |
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Most Excellent!
Sorted!
Many many thanks
Ed
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bitsilly
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| posted on 23/9/10 at 04:11 PM |
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As an aside, I was not planning on using the auto-choke (I learned something today!). It was disconnected on previous engine, so I was going to leave
it disconnected.
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ko_racer
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| posted on 23/9/10 at 04:26 PM |
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I wouldn't leave the auto choke disconnected or the choke will be on all the time, it releases the throttlw once it gets warm.
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bitsilly
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| posted on 23/9/10 at 04:44 PM |
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I think the prev owner has removed the insides, I'll double check though.
Does anyone know, when the engine is HOT, is the piston at the bottom of the choke out or in?
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bitsilly
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| posted on 23/9/10 at 04:50 PM |
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The spring has been taken off mine so the cold idle plungers are always shut (in the engine hot position).
[Edited on 23/9/10 by bitsilly]
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adithorp
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| posted on 23/9/10 at 05:17 PM |
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My car's at work so can't say which way it works but can look tommorow if you need. Mines conected and I can't see any reason not to
use it. It starts from cold with no throttle and idles just above cold idle but not by much.
adrian
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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bitsilly
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| posted on 23/9/10 at 05:27 PM |
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Don't worry mate but thanks.
I have figured out the workings. It looks like it was originally connected but then disabled. Possibly a duff choke. I'll carry on as is, but
e-mail prev owner.
Ed
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bitsilly
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| posted on 24/9/10 at 05:38 PM |
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Have decided to blank off the small pipes near the main in and main out as I will not be using the cold idle.
If anyone sees a reason not to please let me know.
Thanks for the help.
Ed
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