Alloyworks All-aluminum radiator-cap question

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Alloyworks All-aluminum radiator-cap question

Postby smj999smj » Sun Apr 07, 2024 5:12 pm

Has anyone purchased the Alloyworks all-aluminum radiator and installed it on their R51 Pathfinder? The radiator is nice, but the cap they supply is incorrect for our vehicles. It has a 16 PSI rated cap with the spring and plunger on the bottom of the cap. As most of you know, it is the coolant reservoir cap that is the 16 PSI pressure cap for the cooling system on the VQ40DE engines. The radiator cap does not have a spring nor plunger on the bottom side, only a seal for the top of the radiator neck. While I suppose I could cut off the thermal spring and plunger from the Alloyworks radiator cap, a second problem arises in that it contacts the bottom of the hood when closed. Our factory radiator cap is the equivalent of a Motorad # TR3, which won't fit the Alloyworks radiator. A Motorad # T3 radiator cap is very close to fitting, but the engagement tangs on the bottom of the cap that catch the threads of the radiator neck when installing the cap need to be about 1/8-inch lower to properly install the T3 cap on the radiator. Has anyone found a cap that fits or a solution to this? Thanks!


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