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Long story but I need a radiator for a project and I have one here spare.
On the original design for this engine the inlet to the engine (ie the cold supply through the thermostat) was at the bottom. Warm coolant was fed into the top inlet on the opposite side.
This new one will have the cooler water exiting the top of the radiator to the thermostat housing if I fit it.
My thinking is heat rises and as such the warmer coolant will be at the top, this negating most of its cooling effect. Is this so? Or will it not matter if air is running through it when driving?
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colnerov
Posted a lot
Posts: 2,832
Member is Online
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Hi, Radiators work by hot in at the top and cold out at the bottom. Apart from dimension differences to fit the space allocated, hose connections are, broadly speaking, of two configurations ie top left and bottom right or top right and bottom left. Turning it upside down won't change the configuration of a given radiator. You can use the other configuration but you have to change the hose runs which may not be practical.
Colin
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Hi, Radiators work by hot in at the top and cold out at the bottom. Apart from dimension differences to fit the space allocated, hose connections are, broadly speaking, of two configurations ie top left and bottom right or top right and bottom left. Turning it upside down won't change the configuration of a given radiator. You can use the other configuration but you have to change the hose runs which may not be practical. Colin Yeah that’s the issue, it won’t work for my application. Thanks |
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Hi, Radiators work by hot in at the top and cold out at the bottom. Apart from dimension differences to fit the space allocated, hose connections are, broadly speaking, of two configurations ie top left and bottom right or top right and bottom left. Turning it upside down won't change the configuration of a given radiator. You can use the other configuration but you have to change the hose runs which may not be practical. Colin Yeah that’s the issue, it won’t work for my application. Thanks |
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Is the radiator a horizontal or vertical flow design? i.e. Are the tanks on the side or the top of the radiator. If it is horizontal flow it will have little effect. The older Audi S8 iirc had the coolant entering the bottom due to packaging restraints. I don't think it would make a huge difference on a vertical flow rad either. This is a pumped system. If it was a thermo syphoning system then it would have to enter the top to create the coolant flow. As cars now have a water pump it is not crucial
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Last Edit: Mar 8, 2018 19:22:01 GMT by jonsey
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Mar 10, 2018 20:58:53 GMT
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I've had my radiator upside down for years (turning it upside down meant that using the original mounting brackets the rad would sit 4 inches lower)never had a cooling issue with it.
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scimjim
Club Retro Rides Member
Posts: 1,503
Club RR Member Number: 8
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Mar 11, 2018 10:52:08 GMT
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On the original design for this engine the inlet to the engine (ie the cold supply through the thermostat) was at the bottom. Warm coolant was fed into the top inlet on the opposite side. This new one will have the cooler water exiting the top of the radiator to the thermostat housing if I fit it. Cold water inlet to the engine is via the water pump and will be fed from the lower outlet - the thermostat regulates the flow out of the engine to the top inlet of the rad. The only things that give the rad a “top” or “bottom” are the fittings and the “holes”. Main in/out aren’t a problem but if you have a bleed fitting, that will need a redesign, if you have a fan temp sensor it may be a few degrees out if it’s not central, and of course a bleed point will be pretty redundant  |
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Last Edit: Mar 11, 2018 10:53:59 GMT by scimjim
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