Coolant Filler Pressure Cap

They are simply conditions of the cooling systems capability the ambient air temperature and air flow.

Coolant filler pressure cap.

When the pressure reaches 15 psi the pressure pushes the valve open allowing coolant to escape from the cooling system. In this case a catch can or overflow can be used with the expansion tank to recapture expelled coolant. 1 48 2 54 plastic cap threaded. Gates manufactures our oe quality radiator caps and cool control caps for your heavy duty vehicle applications with a selection of durable wear resistant radiator caps for automotive applications without.

Radiator caps are critical to catch coolant overflow keeping your engine cooling system operating at optimal pressure and temperature and your vehicle operating at optimal performance. 1 08 3 11 plastic cap threaded. Plastic cap threaded. Typically the pressure found inside the radiator is 16 pounds per square inch and the radiator cap is the piece that controls that pressure.

If the pressure is not constant your vehicle could run the risk of overheating. If there is no pressure in the cooling system the coolant will boil off. But they do a lot more than just that. Radiator caps and filler necks j164 200502 this sae standard was developed primarily for passenger car and truck application but may be used in marine industrial and similar applications.

Car mk4 golf 2002 tdi i experienced water loss over a short period e g. The radiator pressure cap is a two valve part that holds coolant and keeps the radiator system pressurized. Click product link for more information. On the other hand if the pressure was allowed to increase above 16 psi the cooling system including the hoses and.

Hi all just after bit of advise after replacing coolant cap. 2 36 surge tank cap. Remember none of the above running temperatures have anything to do with the cap rating. The radiator cap and expansion tank cap make sure the filling hole of the radiator and expansion tank are sealed off gastight.

The expansion tank will have the vented cap in case the pressure exceeds the expansion tank s capacity. The purpose of this document is to provide dimensions for the different pressure ratings of boyonet type radiator pressure caps and filler necks. Caps are designed to ensure that the prescribed pressure on the cooling system is maintained at all times during operation by allowing air to escape in case of overpressure. Most radiator pressure caps keep the system pressure at 16 psi so the engine coolant can get considerably hotter without the fear that it will boil off.

Click product link for more information. The cap is the only place where this pressure can escape so the setting of the spring on the cap determines the maximum pressure in the cooling system. With this type of system if the radiator has a cap it will be a non vented cap.