4.7L radiator cap pressure rating
#1
4.7L radiator cap pressure rating
My 2002 Dakota had the radiator replaced a few years ago along with replacing the hoses. The radiator cap on the new top hose is rated at 20 psi. While most manufacturers say a 4.7 should take a 20psi cap, there are also a lot of comments on line saying the factory spec is 14-18 psi and the proper cap should be a 16 psi. I notice listings saying there were 285 and 287 4.7L engines. Could the factory rec cal for 16 psi on some year models and 20 psi on others?
#5
Personal opinion -> i feel if 12-14lb caps were used, instead of 19lb caps, maybe heater cores would last longer. but thats just my personal opinion and not based in fact at all.
Personal experience-> 2004 3.7 in winter running a 13lb cap, my heater core that had a slight seeping is now unnoticeable and the coolant level remains constant. Heat output is fine. Maybe its the lower pressure cap resulting in an early pressure release and overflow, maybe its the new radiator and high flow thermostat, who knows.
Personal experience-> 2004 3.7 in winter running a 13lb cap, my heater core that had a slight seeping is now unnoticeable and the coolant level remains constant. Heat output is fine. Maybe its the lower pressure cap resulting in an early pressure release and overflow, maybe its the new radiator and high flow thermostat, who knows.
Last edited by XSubaruJeepDude; 01-24-2019 at 05:13 AM.
#6
Personal opinion -> i feel if 12-14lb caps were used, instead of 19lb caps, maybe heater cores would last longer. but thats just my personal opinion and not based in fact at all.
Personal experience-> 2004 3.7 in winter running a 13lb cap, my heater core that had a slight seeping is now unnoticeable and the coolant level remains constant. Heat output is fine. Maybe its the lower pressure cap resulting in an early pressure release and overflow, maybe its the new radiator and high flow thermostat, who knows.
Personal experience-> 2004 3.7 in winter running a 13lb cap, my heater core that had a slight seeping is now unnoticeable and the coolant level remains constant. Heat output is fine. Maybe its the lower pressure cap resulting in an early pressure release and overflow, maybe its the new radiator and high flow thermostat, who knows.
#7
Trending Topics
#8