Rover V8 Coolant Circulation Direction

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garrycol
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Rover V8 Coolant Circulation Direction

Post by garrycol » Sat Sep 14, 2019 4:48 am

With a Rover V8 3.5 with carbs which direction does the coolant flow? Out the inlet manifold through the thermostat into the top radiator hose, into the top of the radiator through the radiator, out the bottom hose and back to the water pump or is it vice versa?

I have a Rover v8 with the 4.0 serpentine timing cover where the water pump turns the opposite way to the V belt 3.5. In the system I have the water pump takes the coolant from the engine block, into the bottom of the radiator up through the radiator and out the top of the radiator, back to the thermostat and into the inlet manifold etc.

The problem I have is that because the thermostat is closed no hot water gets to it to open it - yes the thermostat is all OK - you can touch the thermostat housing and it is still cold when the radiator is boiling. If you touch the radiator end of the top radiator hose it is very hot as it should be but the thermostat end is cold because the thermostat is closed (because everything is cold) an not allowing hot coolant back to to the engine.

It is almost as if I need the thermostat in the bottom radiator hose.

Open to ideas.

Thanks

Garry



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Ian Anderson
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Re: Rover V8 Coolant Circulation Direction

Post by Ian Anderson » Sat Sep 14, 2019 7:40 am

Simplest is to drill a 1/4 inch hole in the outside of the thermostat and position this at top to help air bleeding.

It will allow some coolant flow and allow the hot stiff to get to the thermostat and allow it to open

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.

garrycol
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Re: Rover V8 Coolant Circulation Direction

Post by garrycol » Sat Sep 14, 2019 8:52 am

Ian Anderson wrote:
Sat Sep 14, 2019 7:40 am
Simplest is to drill a 1/4 inch hole in the outside of the thermostat and position this at top to help air bleeding.
Hi Ian - thanks for that but I am not sure I follow - can you explain a bit further? For a dummy :lol:

Thanks

Garry

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Ian Anderson
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Re: Rover V8 Coolant Circulation Direction

Post by Ian Anderson » Sat Sep 14, 2019 8:41 pm

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.

garrycol
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Location: Australia

Re: Rover V8 Coolant Circulation Direction

Post by garrycol » Sun Sep 15, 2019 2:14 am

Ok got it now :idea: - thanks - my initial thought was you were referring to drilling a hole in the thermostat housing :? .

Cheers and thanks

Garry

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