radiator cap - from 1.1 to .9 masama ba ito?

[nickel68]

Bro.

My comment sa radiator na walang cap.
**Kung walang radiator cap, meron yan Expansion Tank dun nio rin makikita yung radiator cap.

The radiator cap serves two purpose:

• as Pressure Relief - it releases the pressure of the cooling at its rated pressure (tolerance +/- 5% of the rated pressure), when the coolant gets heated this will expand up to the rated pressure and then release the vapor to the reservoir.
• as Vacuum Relief - makikita nio sa ilalim sa gitna meron maliit na plate. When you stop running your engine the cooling system will slowly cool down to ambient condition, dito sa loob ng cooling system magkakaroon ng contraction (kanina nag expand kasi mainit yung coolant) yung vacuum relief ay unti-unti mag open until masipsip na nia yung water sa reservoir pabalik sa radiator.

[JD_Reed]

[QUOTE=nickel68;1155558]Mga Bro.
In my opinion about this radiator cap sizes/configurations and pressure rating. Share ko lang my knowledge becoz im into 15 years in the manufacture/design of radiators, sa RADPHIL, SALAMA Rad in KSA and now in SERCK-UAE, makikita nio sa market ibang size ng cap say:
A) Nippon Denso Rad Cap = 1.1 kg/cm2 (ginagamit ito sa mga Plastic Tank Radiators, OEM)
B) Common Rad Cap = 1.1 kg/cm2 (gamit ng mga Brass Tank Radiators)
**A and B will have same performance. You may ask why ND designed new cap, its only a market strategy that they will only have this kind of cap.

Going to cap rating pressure 1.1, 0.9 and 0.5 kg/cm2, i can share some thermodynamics properties.
1.) 1.1 = boiling point is 121-123 C
2.) 0.9 = boiling point is 116-118 C
3.) 0.5 = boiling point is 110-112 C
Note:
In making a design for radiator we usually assumed in atmospheric condition, so 100 C as max. temp. of the cooling water, then droping it by 5 to 7 C. Sa Pinas we set the ambient air *35C pero dito sa Middle East we set our design Air Temp. at 50C. This will equate to more heat transfer surface area.
Causes ng Overheating Radiator side :
1. Cooling Tubes are plugged with dirts.
2. Cooling Fins are plugged with airborne dirts and damaged fins.
3. Common case, we always look for increasing the number of rows for better cooling, but the electric cooling fan will suffer due to increase in resistance, yung volume of air will not be sufficient. Note on air flow direction: from Front Grille- condenser and then the radiator - Cooling Fan. Upgrading your Rad from 1R to 2R you should consider upgrading your cooling fan (Condenser Side).[/QUOTE



Ano po ba dapat na rad. cap para sa Corolla Gli? Thanks

[johnjoseph]

:

Ano po ba dapat na rad. cap para sa Corolla Gli? Thanks

Corolla GLi car ko, ever since, 0.9 gamit na radiator cap

[EVO-V]

Bro.

My comment sa radiator na walang cap.
**Kung walang radiator cap, meron yan Expansion Tank dun nio rin makikita yung radiator cap.

The radiator cap serves two purpose:

• as Pressure Relief - it releases the pressure of the cooling at its rated pressure (tolerance +/- 5% of the rated pressure), when the coolant gets heated this will expand up to the rated pressure and then release the vapor to the reservoir.
• as Vacuum Relief - makikita nio sa ilalim sa gitna meron maliit na plate. When you stop running your engine the cooling system will slowly cool down to ambient condition, dito sa loob ng cooling system magkakaroon ng contraction (kanina nag expand kasi mainit yung coolant) yung vacuum relief ay unti-unti mag open until masipsip na nia yung water sa reservoir pabalik sa radiator.

It is actually a pressure cap first before anything else. Elevating the pressure of the cooling loop by one atmosphere raises the boiling point of the coolant.

[halimaw]

Revive ko yun thread.. Ano ba rad cap ng fortuner '07 vvti 2.7 gas. 1.1 or .9? Nabasa ko na lahat ng reply pero di pa din clear kung masama ba from 1.1 tapos .9 ang ginamit..

[Teaspoon]

1.1 yung stock ng 07 Fortuner Gas. Di ko alam ano effect kung 0.9 gagamitin. Gumamit ako ng 0.9 nung nasira yung stock rad cap, pero pinalitan ko agad ulit ng 1.1

[shadow]

Revive ko yun thread.. Ano ba rad cap ng fortuner '07 vvti 2.7 gas. 1.1 or .9? Nabasa ko na lahat ng reply pero di pa din clear kung masama ba from 1.1 tapos .9 ang ginamit..

Mas magiging mababa pressure na kaya pigilan ng .9, alam ko hinde pwede bumababa pero pw3se yun mas mataas ipalit.


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[josh170371]

I bought secondhand Isuzu Crosswind XTO A/T 2002. It's rad cap is not orig (circuit) and rubber is worn out. I don't know what psi, (1.1 or 0.9) to buy for replacement. Please help.

[ninjababez]

I bought secondhand Isuzu Crosswind XTO A/T 2002. It's rad cap is not orig (circuit) and rubber is worn out. I don't know what psi, (1.1 or 0.9) to buy for replacement. Please help.

tanong ka lang sa uv drivers or sa auto supply mismo, alam na nila yan.


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