Coolant Filler Pressure Cap

The loss of coolant would eventually fill the radiator with air and the temperature would rise even higher.

Coolant filler pressure cap.

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. 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. But they do a lot more than just that. 2 36 surge tank cap.

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. With this type of system if the radiator has a cap it will be a non vented cap. If the pressure is not constant your vehicle could run the risk of overheating.

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. Remember none of the above running temperatures have anything to do with the cap rating. The radiator pressure cap is a two valve part that holds coolant and keeps the radiator system pressurized. The purpose of this document is to provide dimensions for the different pressure ratings of boyonet type radiator pressure caps and filler necks.

The expansion tank will have the vented cap in case the pressure exceeds the expansion tank s capacity. The radiator cap and expansion tank cap make sure the filling hole of the radiator and expansion tank are sealed off gastight. 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. Car mk4 golf 2002 tdi i experienced water loss over a short period e g.

Typically the pressure found inside the radiator is 16 pounds per square inch and the radiator cap is the piece that controls that pressure. Click product link for more information. Click product link for more information. 1 08 3 11 plastic cap threaded.

Hi all just after bit of advise after replacing coolant cap. They are simply conditions of the cooling systems capability the ambient air temperature and air flow. When the pressure reaches 15 psi the pressure pushes the valve open allowing coolant to escape from the cooling system. 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.

If there is no pressure in the cooling system the coolant will boil off. Plastic cap threaded. In this case a catch can or overflow can be used with the expansion tank to recapture expelled coolant.