Yet Another Radiator Cap Pressure

[mongobread]

Kung ano yung stock yun ang gamitin mo. Kung hindi ka naman nagpalit ng thermostat. radiator cap naka depende yan sa thermostat. Stock thermostat = stock radiator cap. Kung wala ka thermostat, lagay ka.


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Poorly maintained ang kotse when I got it. It has 0.9 cap in it, the service manual says I can go 0.83 to 1.1 as stated here:

Main Valve opening pressure = 81.4-108 kPa (11.8 - 15.6 psi, 0.83-.1 kg/cm*)

I do plan to get thermostat sir and thermoswitch.

And here's the book says:
Thermostat
Valve opening temperature = 88 +/- 1.5 degrees celcius (190.4 +/- 2.7 degrees farenheit)
Full-opening temperature = 100 deg c (211 deg F)
Valve lift, fully open = 8 mm (0.31 in) or more
Identification mark = 88 (Stamped on flange)

What I want to get clarification is that should I go 1.1 cap to improve boiling point to fight against init ng pinas? Or I should go 0.9 dahil may edad na yung radiator at panay leak kaya re-patch pa rin after overhaul (under warranty kaya free patch)

What I have posted is stock cap is 0.83 - 1.1 caps is acceptable.

[dr. d]

Poorly maintained ang kotse when I got it. It has 0.9 cap in it, the service manual says I can go 0.83 to 1.1 as stated here:

Main Valve opening pressure = 81.4-108 kPa (11.8 - 15.6 psi, 0.83-.1 kg/cm*)

I do plan to get thermostat sir and thermoswitch.

And here's the book says:
Thermostat
Valve opening temperature = 88 +/- 1.5 degrees celcius (190.4 +/- 2.7 degrees farenheit)
Full-opening temperature = 100 deg c (211 deg F)
Valve lift, fully open = 8 mm (0.31 in) or more
Identification mark = 88 (Stamped on flange)

What I want to get clarification is that should I go 1.1 cap to improve boiling point to fight against init ng pinas? Or I should go 0.9 dahil may edad na yung radiator at panay leak kaya re-patch pa rin after overhaul (under warranty kaya free patch)

What I have posted is stock cap is 0.83 - 1.1 caps is acceptable.

I don't think your choice of cap is the cause of overheating. Look for another cause.
In some cars, water pump failure is manifested by a leak and not primary overheat.

[mongobread]

I don't think your choice of cap is the cause of overheating. Look for another cause.
In some cars, water pump failure is manifested by a leak and not primary overheat.

Sir hindi po cause of overheat question ko:

I read that increasing the pressure increases the boiling point but make sure there's no weak points in the cooling system.

Now based sa specs ng book I'm allowed to use 1.1, but based sa nabasa ninyong status ng cooling system do you think I should stick to 0.9?

Simply put, can my current overhauled, 2 timed repatched radiator, & old hoses with no thermostat in the engine plus the rekta fan setup can handle the increase pressure of 1.1 cap? (Note: I'm slowly trying to bring back stock setups to my 4g15 carb project. What I'm asking is the current setup)

[12vdc]

Your boiling point will remain the same, only difference is the cap will open at higher temps causing more pressure on the walls of cooling system. Since you mentioned the radiator is old and had history of leaks, that means the rad core couldn't withstand normal pressure range of your cooling system. It's your radiator that needs replacement-core is thinning due to corrosion. Cap opens(positive pressure) only when your'e on overheating condition. Since you are not overheating, then cap is not a factor.

Sabi ng radiator mo.. palitan mo na ako please. lol

I'd replace the leaky radiator, replace hoses, install back thermostat, and wire back thermoswitch to fan. From there if it still feels hot then i'd look somewhere else like correct coolant or waterpump (those glitters are telltale of worn pump or fragments from radiator core).

[jaypee10]

hindi issue ang radiator cap sa overheating maliban lang kung sira na talaga siya at tumnatagas na dun mismo sa cap ung tubig ng radiator mo.

1. buksan mo ung radiator cap at silipin mo kung nag si circulate ang tubig .kung hindi nag sicirculate.baka may thermotat pa siya,
subukan mo muna tanggalin ung thermostat.saka mo paandarin ulit para malaman mo kung umiikot ba ng maganda ang tubig sa makina mo papunta sa radiator..kung hindi na umiikot ng mabilis malamang water pump may problema.