Radiator cap.... answer asap if possible

[Jerkratt]

not sure if this is the right place to post but move it if need be. i was wondering what is the cap pressure? on them cause i wanna get a diffrent one but i dont know what the psi is

[Blenjar]

i would answer if I knew...

-- Blen

[Jerkratt]

wow fast responce.... lol im looking in the online manual for answer also lol

[acdaazn]

If I am not mistaken, the number on your stock cap tells you the pressure.
Edit: I think it's 1.1 kg/cm^sq. The only place I have seen a TRD 1.1 cap is at trdsparks. Make sure it's type-N, not S.

[Jerkratt]

ok understood. now my second question is the TRD booklet says that there Radiator cap for the yaris is 18.5 thats a big jump from the stock 1.1 no?

[ism3t]

the good news is, i am a math major, so gimme a min...

18.5-1.1=....carry the 5....divide the cosigns...yeah

yeah its 17.4 better. I'd say go for it.

[Jerkratt]

i ment in effect to the engine... well cooling system. can it do more harm then good?

[acdaazn]

If you are in NJ, I wouldn't bump the cap pressure. Afterall, you didn't mod your engine to run super rich, and the winter might cause over-cooling during start-ups.

[ricky2k1]

the pressure on the cap is rated in bars

[acdaazn]

Just to clarify some convertion.
Bar = kg/sq.cm psi = lb/sq.in

1.1 kg/sq.cm = 15.9 psi
1.3 kg/sq.cm = 18.85 psi

[Jerkratt]

ahhhh ok thanks

[ricky2k1]

when the engine gets hot, coolant builds up pressure. the cap just relieves some of the pressure and puts it in the overflow tank. when it cools down it goes back into the radiator. If u decide to let the engine build up some more pressure than recommended, i think your gonna see some leaks somewhere (ie. water pump)

[Jerkratt]

icic ok thanks