Radiator cap.... answer asap if possible - Toyota Yaris Forums

Jerkratt · 06-10-2007, 12:17 AM

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 · 06-10-2007, 12:20 AM

i would answer if I knew...

-- Blen

Jerkratt · 06-10-2007, 12:20 AM

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

acdaazn · 06-10-2007, 02:11 AM

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 · 06-10-2007, 05:59 AM

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 · 06-10-2007, 06:04 AM

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 · 06-10-2007, 07:37 AM

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

acdaazn · 06-10-2007, 01:08 PM

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 · 06-10-2007, 01:31 PM

the pressure on the cap is rated in bars

acdaazn · 06-10-2007, 02:54 PM

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 · 06-10-2007, 03:58 PM

ahhhh ok thanks

ricky2k1 · 06-10-2007, 04:49 PM

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 · 06-10-2007, 10:59 PM

icic ok thanks

06-10-2007, 12:17 AM	#1
Jerkratt View User's Garage Drives: 08 Yaris Liftback S (RIP 07) Join Date: Apr 2007 Location: Fair Lawn, NJ Posts: 1,378	Radiator cap.... answer asap if possible 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 __________________ "It hurts more when its wet"

06-10-2007, 12:20 AM	#2
Blenjar View User's Garage Drives: Black Yaris 07 HB Join Date: Apr 2006 Location: CT Posts: 1,548	i would answer if I knew... -- Blen __________________ http://www.360voice.com/tag/noobblenjar My Car http://www.yarisworld.com/forums/showthread.php?t=4245 My DJ www.PainlessWolf.com

06-10-2007, 12:20 AM	#3
Jerkratt View User's Garage Drives: 08 Yaris Liftback S (RIP 07) Join Date: Apr 2007 Location: Fair Lawn, NJ Posts: 1,378	wow fast responce.... lol im looking in the online manual for answer also lol __________________ "It hurts more when its wet"

06-10-2007, 02:11 AM	#4
acdaazn Drives: Toyota Join Date: Apr 2007 Location: NJ Posts: 81	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. __________________ Last edited by acdaazn; 06-10-2007 at 02:53 AM.

06-10-2007, 05:59 AM	#5
Jerkratt View User's Garage Drives: 08 Yaris Liftback S (RIP 07) Join Date: Apr 2007 Location: Fair Lawn, NJ Posts: 1,378	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? __________________ "It hurts more when its wet"

06-10-2007, 06:04 AM	#6
ism3t YarVitz Drives: 07' Yaris Liftback Join Date: Sep 2006 Location: Southern California Posts: 222	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.

06-10-2007, 07:37 AM	#7
Jerkratt View User's Garage Drives: 08 Yaris Liftback S (RIP 07) Join Date: Apr 2007 Location: Fair Lawn, NJ Posts: 1,378	i ment in effect to the engine... well cooling system. can it do more harm then good? __________________ "It hurts more when its wet"

06-10-2007, 01:08 PM	#8
acdaazn Drives: Toyota Join Date: Apr 2007 Location: NJ Posts: 81	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. __________________

06-10-2007, 01:31 PM	#9
ricky2k1 Drives: Black YARIS RS Join Date: Apr 2007 Location: Vancouver BC Posts: 16	the pressure on the cap is rated in bars

06-10-2007, 02:54 PM	#10
acdaazn Drives: Toyota Join Date: Apr 2007 Location: NJ Posts: 81	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 __________________

06-10-2007, 03:58 PM	#11
Jerkratt View User's Garage Drives: 08 Yaris Liftback S (RIP 07) Join Date: Apr 2007 Location: Fair Lawn, NJ Posts: 1,378	ahhhh ok thanks __________________ "It hurts more when its wet"

06-10-2007, 04:49 PM	#12
ricky2k1 Drives: Black YARIS RS Join Date: Apr 2007 Location: Vancouver BC Posts: 16	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)

06-10-2007, 10:59 PM	#13
Jerkratt View User's Garage Drives: 08 Yaris Liftback S (RIP 07) Join Date: Apr 2007 Location: Fair Lawn, NJ Posts: 1,378	icic ok thanks __________________ "It hurts more when its wet"

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