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Radiator Overflow/Recovery System
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Hey there brainstrust I've discussed this with several members on here (thanks gents) and this weekend's I want to try and install it all. In making room in the HG engine bay for all the 5L Commodore ancilary stuff, I've decided to put the radiator overflow bottle under the guard like a VT V6. Everything I've read says the overflow tank should be at the same level as the top tank or filler cap. But that's not the way it is in the VT V6. Now I know it's a side tank arrangement, so is what the difference is?? Or is it the fact the top of the filler is level with the top of the radiator in the VT?? Can some one explain to me why this won't work?? Here's a mock up out of the car of what the levels will end up being in the G with the HQ radiator and VT V6 overflow bottle.  And here's how it would be in the Commodore (except of course it's a Ford radiator, but don't tell anyone).  So why won't it work?? Really interested in the thoughts of those that know a lot about this stuff. Thanks and cheers Jeremy Edited by user Wednesday, 20 April 2011 8:55:46 AM(UTC)
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I think what needs to be understood here, is the difference between an overflow/recovery system & a pressurised header (or surge) tank.
If you look at Camiras, early VN V6 Commodores & most Falcons from EA to present, they have a header tank. The radiator pressure cap is fitted to the header tank, so it has to be positioned as the highest point in the cooling system, so the system will 'bleed' itself. The header tank also runs at full radiator pressure & has its own overflow, if the system excessively overheats.
With an overflow/recovery system the position of the bottle is less critical, but it must be at or below the radiator cap. An overflow bottle is not pressurised. If it is mounted too high it will siphon empty as soon as the radiator cap is removed. There in nothing wrong with mounting the overflow bottle as low as the VT set-up. If it is too low, say in a huge truck & it is 6 or 7 feet below the radiator it will have difficulty in the recovery phase because the coolant is 'sucked' out the the tank as the radiator coolant & its pressure drops.
Dr Terry |
If at first you don't succeed, just call it Version 1.0 |
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Rank: Member
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Thanks Terry
I'd noticed that difference, and maybe that wasn't clear in the stuff I'd read on the internet.
After all - everything you read on the internet is clearly right :)
So bottom line is you reckon this setup should work OK then??
Cheers
Jeremy |
The G will roll again.... eventually |
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