Callum&Doug Callum Field Melbourne, Australia (5 posts) Registered: 10/04/2016 01:16AM Main British Car: 1973 MGB Roadster Rover 3.5 |
Rover 3.5 water system hoses. Need help!
Hi there,
As we approach the latter stages in our father son mgb v8 conversion, information just isn't clear on the routing of hoses. We are running an edelbrick performer intake, mgb v8 ally radiator with pressurised resevoir and an sd1 water pump. Now ill try my best to get across where I am at with my knowledge thus far. I have bottom rad hose connecting to the water pump, the top rad hose connecting to the thermostat housing. Now I'm not sure what the second smaller port on the water pump is meant to do? We aren't running a heater, do I need to run it under the manifold then into the return on the back of the manifold? Can I just block it off? My thermostat housing doesn't seem to have a slot for a thermostat, nor does the manifold, does it just sit inside? Also, where could I get a water temp sender in this system? Any help would be greatly appreciated. Callum & Doug |
Callum&Doug Callum Field Melbourne, Australia (5 posts) Registered: 10/04/2016 01:16AM Main British Car: 1973 MGB Roadster Rover 3.5 |
Re: Rover 3.5 water system hoses. Need help!
Also, why do some thermostat housings online have a seperate small inlet port
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mgb260 Jim Nichols Sequim,WA (2463 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Rover 3.5 water system hoses. Need help!
Buick used the bypass hose at thermostat housing, Rover was at front of intake. I think the Performer intake should use the Buick 215/300/340 thermostat housing with bypass. Either one, you need the bypass or you will overheat. It allows circulation until the thermostat opens. Also you should drill a 1/4" hole on each side of opening behind the thermostat housing.
You can use a SBF thermostat housing like this, and mount your temp sensor where the plug is. You have to drill the mounting holes a little bit to line up. Edited 2 time(s). Last edit at 10/04/2016 03:08AM by mgb260. |
Callum&Doug Callum Field Melbourne, Australia (5 posts) Registered: 10/04/2016 01:16AM Main British Car: 1973 MGB Roadster Rover 3.5 |
Re: Rover 3.5 water system hoses. Need help!
That looks like exactly what I need, thanks for your reply!! For the plumbing, bottom radiator to water pump, top radiator to thermostat housing, bypass on thermostat housing to the top hole on the water pump, I was just going to block the other smaller hole on the water pump facing the back of the motor, then also block the old port at the back of the manifold that I assume was heater return? Is this all correct? Thanks in advance. Callum
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mstemp Mike Stemp Calgary, Canada (223 posts) Registered: 11/25/2009 07:18AM Main British Car: 1980 MGB Rover 4.6L |
Re: Rover 3.5 water system hoses. Need help!
Don't think that's right.
Back of water pump goes to bypass on thermostats housing. Back side of manifold goes to the vertical port of the water pump. Back of manifold ussualy feed heater and then the return from heater goes to the vertical water pump port. |
Callum&Doug Callum Field Melbourne, Australia (5 posts) Registered: 10/04/2016 01:16AM Main British Car: 1973 MGB Roadster Rover 3.5 |
Re: Rover 3.5 water system hoses. Need help!
Wouldn't that theoretically become another bypass of the thermostat if you're not running a heater and have no heater valve to shut it off, therefore not letting the radiator work to cool as efficiently?
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Moderator Curtis Jacobson Portland Oregon (4577 posts) Registered: 10/12/2007 02:16AM Main British Car: 71 MGBGT, Buick 215 |
Re: Rover 3.5 water system hoses. Need help!
quote: "I was just going to block the other smaller hole on the water pump facing the back of the motor, then also block the old port at the back of the manifold that I assume was heater return? Is this all correct?"
I ran with those two ports blocked for years, without problems. |
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MGBV8 Carl Floyd Kingsport, TN (4512 posts) Registered: 10/23/2007 11:32PM Main British Car: 1979 MGB Buick 215 |
Re: Rover 3.5 water system hoses. Need help!
On my 215 with Buick 300 water pump, the horizontal fiiting pointing toward the engine goes to the thermostat housing, as stated. The vertical fitting goes to the upper heater core fitting.
I agree with Curtis. I would use a thermostat with a small bypass hole, though. Edited 1 time(s). Last edit at 10/04/2016 11:05AM by MGBV8. |
mstemp Mike Stemp Calgary, Canada (223 posts) Registered: 11/25/2009 07:18AM Main British Car: 1980 MGB Rover 4.6L |
Re: Rover 3.5 water system hoses. Need help!
Carl,
That's what I was saying. Callum, If you run a surge tank that rear manifold fitting makes a good point to tie into and feed back into water pump top vertical fitting. Edited 1 time(s). Last edit at 10/04/2016 11:44AM by mstemp. |
mgb260 Jim Nichols Sequim,WA (2463 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Rover 3.5 water system hoses. Need help!
Chris Gill had overheating issues without the bypass on his 300 stroker (350) but no issues with the previous 215.
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Callum&Doug Callum Field Melbourne, Australia (5 posts) Registered: 10/04/2016 01:16AM Main British Car: 1973 MGB Roadster Rover 3.5 |
Re: Rover 3.5 water system hoses. Need help!
Thanks guys, overwhelmed with the help on hand. Colin, did you use the verticals port for your bypass and block the horizontal? I think I'm going to opt for just blocking the others as I can't understand the difference of that and just having a heater valve closed?
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