New Aluminium Radiator !!! - Still running alittle hot

[Lyle_Style]

Hey guys
Basically got an aftermarket aluminium radiatorr for my honda and after installion and several flushes it still seems to be running a little warm then usuall.

I have herd your radiator cap can have an effect on your engine temp? is this tru? if so what do i have to get to get one ? can u buy them or do you have to get one fabbed?

if anyone could give us some info that would be great!
cheers

Lyle

[aimre]

maybe ur head gaskets on its way out?

the radiator cap affect boiling temp of water.... basicly, coz of it, even it temp goes past 100C the water strill wont boil (but it will still be hot)

[BLKCRX]

how hot is hot ?



I run a half size aluminum radiator triple core and its perfect all day every day.

Have you done a compression test ? leak down test ?

Regards James

[bennjamin]

a radiator is only as good as the thermostat + other factors pushing fluid thru it

Thermostat OK ? airbubbles in the mix ?(properly bled etc) ?

[civiceg9]

If you wanted to keep your car running cooler
should of got a low temp themostat and a themo switch.
This will make your running temperature lower.

[Lyle_Style]

ok isnt head gasket, car was running normal b4 radiator change.. no air bubbles in system. i do not have a water temp gauges at the moment i am still reading off the stocko heat in the cluster and it is just a little above where it use to sit, nothing too bad but it just gets me thinking. have not done a leak down or compression test yet as it is at the shop atm...

But basically i am just wondering if the radiator cap can effect the temperature of your car.

also where can i find these low temp thermostats? anywhere on the net and how much do you usually have to spend to get one in and working etc etc...

[aimre]

the radiator cap affect boiling temp of water.... basicly, coz of it, even it temp goes past 100C the water strill wont boil (but it will still be hot)

[Lyle_Style]

is that a 'yes it can' or 'no it cant'

[civiceg9]

Yes the pressure cap will increase your water temp

do a search on Trader section for low temp themostat and switch
or ask z10

[bennjamin]

maybe ur head gaskets on its way out?

the radiator cap affect boiling temp of water.... basicly, coz of it, even it temp goes past 100C the water strill wont boil (but it will still be hot)

Isnt more so the actual coolant ( which is known as anti-freeze/anti-boil) that will directly affect your temp. ?
Try re-bleeding your coolant methinks - possily air bubbles or a inncorrect water:coolant ratio etc

Also , try the correct radiator rated cap for the correct application

[Lyle_Style]

no worries guys ill do a flush when i get my car back and wack in a fresh batch of coolant
cheers for your help!

[aimre]

OK, ben PRESSURE directly effects the boiling point of water. Water boils at 100'C at 100kpa (sea level). Up on Mt Everest, water boils at alot less. Meaning that up on everest, when the water gets to like 50'C it boils (turns to gas) and thus looses much of its ability to gain heat. BUT it is only 50'C so u can still put ur hand in boiling water and not get hurt.

This also works in opposite. At the pressure goes up, Boiling temp goes up. i think our radiator caps let PLAIN WATER boild at 104 or 108'C (as the cap puts the system under pressure) This allows water to take in heat even beyond 100'C thus allowing it to take away heat from the engine and thus cool it.

So in summary:

High pressure = Higher boiling piont
Low pressure = Lower Boiling point

Yes ben, the coolant does most of the work in raising the boiling point, but so does the actual radiator cap

NO lyle, changing the cap WILL NOT lower ur cars temp, it will just mean ur car will still be able to be cooled when the waters temp goes beyond 104'C BUT will not be cooler than normal.

I hope i made sense