Header tank
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Header tank
Now I'm pretty sure this has been covered before BUT what outlet/inlets should be on a header tank,I'm having a tank made which is about 1.5ltr capacity, with a stant cap(18-22lbs) a outlet on the bottom of the tank 16mm, do I need any more?
sorry forgot to say its a rv8 in a capri with, when funds allow a webber 500 and edlebrock manifold, with a cosworth radiator with the inlet via the old temp switch hole at the bottom and a kenlowe swich to the cosworth twin fans in the top hose.
If it needs a inlet to it were from?possibly from the thermostat housing?
Is the tank just a way of filling the system or does it did to be in a type of loop, dont want to end up with a load of trapped wind!
sorry to sound dumb but dont want to shell out money and it not work.
cheers. steve
ps forgot to say if pics would help I will try and get some up.
sorry forgot to say its a rv8 in a capri with, when funds allow a webber 500 and edlebrock manifold, with a cosworth radiator with the inlet via the old temp switch hole at the bottom and a kenlowe swich to the cosworth twin fans in the top hose.
If it needs a inlet to it were from?possibly from the thermostat housing?
Is the tank just a way of filling the system or does it did to be in a type of loop, dont want to end up with a load of trapped wind!
sorry to sound dumb but dont want to shell out money and it not work.
cheers. steve
ps forgot to say if pics would help I will try and get some up.
What he said.katanaman wrote:you would be well advised to include a small pipe high up the header tank to the highest point in the cooling system. This will help purge air out the system that otherwise could get stuck. Mine is on the top rad hose at the top of the bend which is as high as it gets on my install.
How are you going to fill the sytem Steve, via a cap on the rad or through your header tank?
I will be filling the system from the header tank cos the rad doesnt have a cap and it will be a good few inches above the top hose.
could it be a good idea to run a hose from the thermostat bypass to the top end of the tank as Katanaman says? but that would be 16mm the same as the bottom outlet! not a small hose.Or is size not important!
cheers steve
could it be a good idea to run a hose from the thermostat bypass to the top end of the tank as Katanaman says? but that would be 16mm the same as the bottom outlet! not a small hose.Or is size not important!
cheers steve
My Sherpa V8 has a header tank. There's a big (5/8ths bore) pipe from the bottom of the header tank into the bottom hose. Then there's a small (probably 1/4 bore) vent pipe from the top of the radiator to the middle of the header tank to make filling quicker.
Chris.
Chris.
--
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
Thank again lads I think it would be a good idea to get my mate to put a smaller pipe near the top of the tank about 8mm me thinks and then find some were to plumb it in on top of the rad or somewere afterwards, or just blank it off gives me the choice either way. just out of interest which cars came with out the stat bypass P5,P6,SD1??
cheers again steve
cheers again steve
- Ian Anderson
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I'm not convinced re the "near the top" bit
I would expect all entries to the header to be covered in water all the time - or you could get air drawn back in on cool down etc.
The feed back from rad is good idea but let the air "bubble through" and the pope will always be full
Then again I could be wrong - been wrong many times before!
Ian
I would expect all entries to the header to be covered in water all the time - or you could get air drawn back in on cool down etc.
The feed back from rad is good idea but let the air "bubble through" and the pope will always be full
Then again I could be wrong - been wrong many times before!
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.
That is why its supposed to be small bore.Ian Anderson wrote:I'm not convinced re the "near the top" bit
I would expect all entries to the header to be covered in water all the time - or you could get air drawn back in on cool down etc.
The feed back from rad is good idea but let the air "bubble through" and the pope will always be full
Then again I could be wrong - been wrong many times before!
Ian
It should be from the highest point of the cooling circuit as well which on the rover is usually the bend on the top hose. Generally on a rover install the rad will be full but the top hose could end up with a fair bit air in it as there is no real way for it to purge. As to position on the header, it should be under pressure so cant draw back. This is the way virtually every modern car is plumbed. If you look at the header tanks, although it might be a 1/4 bore pipe or larger the tank has a reducer to something more like 1/8. Its only intended to move air although when purged and running there will be a small stream of coolant.