Cooling pipe work layout
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Cooling pipe work layout
3.5 V8 in a Westfield kit.
Car has always run on the hot side but never overheated, has a Westfield supplied Ally rad.
Stationary when the fan cuts in it has a job bringing the temp down and from memory won’t stop until your on the move again.
It’s piped as below but I’m not sure this is correct, I don’t run a heater in the car.
I’m using an offy manifold and it’s has the water connnection at the back as shown, I can’t help thinking the water isn’t circulating through the rad correctly.
Maybe just blanking this connection is all it needs?
Thanks in advance.
Car has always run on the hot side but never overheated, has a Westfield supplied Ally rad.
Stationary when the fan cuts in it has a job bringing the temp down and from memory won’t stop until your on the move again.
It’s piped as below but I’m not sure this is correct, I don’t run a heater in the car.
I’m using an offy manifold and it’s has the water connnection at the back as shown, I can’t help thinking the water isn’t circulating through the rad correctly.
Maybe just blanking this connection is all it needs?
Thanks in advance.
Westfield Seight 3.5 RV8
- Ian Anderson
- Forum Contributor
- Posts: 2396
- Joined: Sun Nov 19, 2006 9:46 pm
- Location: Edinburgh
Re: Cooling pipe work layout
Hi
I would suggest a restrict or between the manifold and Y piece.
Not a blank but perhaps 1.5 mm hole to allow it to bleed air bubbles
This in turn would mean the coolant is forced to flow through the radiator and not have an alternative route.
If you have a hose On this part of the circuit perhaps try clamping it with mole grips to test the theory before making big changes.
Ian
I would suggest a restrict or between the manifold and Y piece.
Not a blank but perhaps 1.5 mm hole to allow it to bleed air bubbles
This in turn would mean the coolant is forced to flow through the radiator and not have an alternative route.
If you have a hose On this part of the circuit perhaps try clamping it with mole grips to test the theory before making big changes.
Ian
Owner of an "On the Road" GT40 Replica by DAX powered by 3.9Hotwre Efi, worked over by DJ Motors. EFi Working but still does some kangaroo at low revs (Damn the speed limits) In to paint shop 18/03/08.
Re: Cooling pipe work layout
I do have a valve suitable for this I could close down to almost nothing.
Westfield Seight 3.5 RV8
Re: Cooling pipe work layout
Think if you do that you’ll have little or no circulation thermostat is closed.
- Ian Anderson
- Forum Contributor
- Posts: 2396
- Joined: Sun Nov 19, 2006 9:46 pm
- Location: Edinburgh
Re: Cooling pipe work layout
I had presumed the thermostat had the hole drilled to allow some flow until the thermostat started to,open
Owner of an "On the Road" GT40 Replica by DAX powered by 3.9Hotwre Efi, worked over by DJ Motors. EFi Working but still does some kangaroo at low revs (Damn the speed limits) In to paint shop 18/03/08.
Re: Cooling pipe work layout
I was under the impression that’s what the bypass hose was for?
Westfield Seight 3.5 RV8
Re: Cooling pipe work layout
That is a bit of an odd arrangement!
Water is sucked into the water pump from the bottom hose, the thermostat bypass hose and the long hose running from the 'Y' connector. It is pumped into the block backwards, and rises into the heads at the back of the engine. Then it travels forwards and comes into the inlet manifold at the front. From there, it goes either back through the inlet manifold and out to the 'Y' piece, out of the thermostat bypass hose, or out through the thermostat into the top of the radiator.
Depending on the radiator design, it is using all of the core? Is there anything to stop the water predominantly dropping down just the side of the core that the two hoses are in?, and never using the whole width?
My money would be to feed the header tank into the bottom hose. Then I would blank the thermostat bypass at the front (both ends), and just use a long hose from the rear of the manifold back around to the water pump as the bypass hose.
As it stands, you have two thermostat bypass circuits.
How big is the radiator? The one in my Landie is about the size of the 17" fan, and does not get anywhere near overheating.
Chris.
Water is sucked into the water pump from the bottom hose, the thermostat bypass hose and the long hose running from the 'Y' connector. It is pumped into the block backwards, and rises into the heads at the back of the engine. Then it travels forwards and comes into the inlet manifold at the front. From there, it goes either back through the inlet manifold and out to the 'Y' piece, out of the thermostat bypass hose, or out through the thermostat into the top of the radiator.
Depending on the radiator design, it is using all of the core? Is there anything to stop the water predominantly dropping down just the side of the core that the two hoses are in?, and never using the whole width?
My money would be to feed the header tank into the bottom hose. Then I would blank the thermostat bypass at the front (both ends), and just use a long hose from the rear of the manifold back around to the water pump as the bypass hose.
As it stands, you have two thermostat bypass circuits.
How big is the radiator? The one in my Landie is about the size of the 17" fan, and does not get anywhere near overheating.
Chris.
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Series IIA 4.6 V8
R/R P38 4.6 V8
R/R L405 4.4 SDV8
Series IIA 4.6 V8
R/R P38 4.6 V8
R/R L405 4.4 SDV8
- Ian Anderson
- Forum Contributor
- Posts: 2396
- Joined: Sun Nov 19, 2006 9:46 pm
- Location: Edinburgh
Re: Cooling pipe work layout
Attached is a simple version on a GT40 something similar work well!
Ian
Ian
Owner of an "On the Road" GT40 Replica by DAX powered by 3.9Hotwre Efi, worked over by DJ Motors. EFi Working but still does some kangaroo at low revs (Damn the speed limits) In to paint shop 18/03/08.
Re: Cooling pipe work layout
Can you post a couple of actual pics of the plumbing in your engine bay. Looks a strange arrangement on the front of your diagram.
Dax Rush 4.6 supercharged V8 MSII
Re: Cooling pipe work layout
Engine is currently out of the car so no pics available, its piped as per the diagram really so im not sure how i can make it any clearer?
Westfield Seight 3.5 RV8
Re: Cooling pipe work layout
On your diagram you have three pipes connecting into to the pump. 2x small and 1x large.
One is a heater return (You don't need this so blank it off)
One is a thermostat bypass hose from the inlet manifold (The small pipe - you need this)
One large one is from the radiator bottom hose (you obviously need this)
The port at the back of the inlet manifold (where you have the Y adapter) would be your heater inlet (you don't need this so blank if off)
The hose from the bottom of your header tank should tee into your large bottom hose from the radiator.
The header tank needs to be the highest point in the cooling system.
One is a heater return (You don't need this so blank it off)
One is a thermostat bypass hose from the inlet manifold (The small pipe - you need this)
One large one is from the radiator bottom hose (you obviously need this)
The port at the back of the inlet manifold (where you have the Y adapter) would be your heater inlet (you don't need this so blank if off)
The hose from the bottom of your header tank should tee into your large bottom hose from the radiator.
The header tank needs to be the highest point in the cooling system.
Dax Rush 4.6 supercharged V8 MSII
Re: Cooling pipe work layout
Thats great, thank you.
Is there any reason i cant leave the hose on the bottom of the header tank connected to the heater return on the pump as the inlet is right next to the rad bottom hose inlet?
Im guessing it will perform the same function.
Is there any reason i cant leave the hose on the bottom of the header tank connected to the heater return on the pump as the inlet is right next to the rad bottom hose inlet?
Im guessing it will perform the same function.
Westfield Seight 3.5 RV8
Re: Cooling pipe work layout
You don't really want much coolant flow through the header tank - so plumbing it directly to the pump (suction) inlet I don't think would be ideal as the pump will be constantly sucking on the header tank. you want as much of your flow (only) through the radiator as possible.
The header tank really only has two jobs, to allow the coolant an air space to expand when it gets hot, and as a high point in the system to collect any air.
Plumbing it into the bottom hose via a long small ID pipe will limit the flow through the tank, whilst enabling the tank volume to change with pressure variations.
Would be easy to try just removing/blanking the Y piece from the back of the manifold and trying it. If it works; great, probably benefit from a restrictor. If still marginal then look at moving the header tank feed pipe into the bottom hose.
The header tank really only has two jobs, to allow the coolant an air space to expand when it gets hot, and as a high point in the system to collect any air.
Plumbing it into the bottom hose via a long small ID pipe will limit the flow through the tank, whilst enabling the tank volume to change with pressure variations.
Would be easy to try just removing/blanking the Y piece from the back of the manifold and trying it. If it works; great, probably benefit from a restrictor. If still marginal then look at moving the header tank feed pipe into the bottom hose.
Dax Rush 4.6 supercharged V8 MSII