The 6 Best vented fill Caps (2023 reviews)

If you often find yourself scrambling for convenient and suitable cap, acdelco vented fill cap is your end point. Engineered to work with your car, truck, or suv, acdelco has a thermostat or cap for virtually any gm vehicle on the road today. The FC219 cap does have a pressure relief and is used by GM on a recall for rear main seal blowouts on one of the Cadillac recalls. It is used to eliminate the back pressure from a clogged pcv office, temporary. This should be factory installed and could save you a lot of money by preventing rear main seal failure.

The FC219 oil cap is designed to vent excessive crankcase pressure above. The tree huggers out there this cap does not freely vent emission into the air.

Why We Like This:

Has a vent to reduce back pressure in new hi performance ls6 motor
Fuel dilutes oil reducing its lubricating and dirt carrying ability
Delivers what they promise

flow security systems Locking Cap

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Compared with other cap in this category, the flow security systems locking cap has a convenient design. As long as you take precautions during washing, this cap is a good option. It fits all 2" standard male and female threads or can be used with a. It can be keyed alike so that multiple fuel caps can be secured with the convenience of having only one key. It will have some diesel fuel leak out the vent holes build in the cap when you overfill your transfer tank.

The adapter has it's own threads and that is what "locks" it on.

Why We Like This:

Easy to install, works every time
Works nice, just the right height
New and hot release

flow security systems vented fill Cap

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This cap is built very well and looks very nice, but it doesn’t have any way to vent. It is a heavy duty locking cap. It has been precisely fitted inside the cap to prevent vapor or fuel leakage. It has a rubber seal and the chain is sweet. It has been machined with 8 finger grooves to allow for a firm grip of the cap when tightening on to the adapter. It is sealed and to be used only on a fuel tank that has independent venting.

It is perfect for all tanks with 2" male or female threads, and the 8” stainless chain retains the cap while filling the tank.

Why We Like This:

Manufactured to the highest standards and built to last a lifetime
Beautifully engineered locking fuel cap and adapter
Nice machining and a lock was easily added
Sealed for use on vented tanks

Rheem vented fill Cap

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate cap. The rheem vented fill cap is exactly that - it's a simple cap that hits all the right notes. It just unthreads with a pipe wrench less than a min,so. The Vented design keeps out debris and water.

Why We Like This:

Good investment for long term
Delivers what they promise

Earl'S performance Plumbing vented fill Cap

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The earl's performance plumbing vented fill cap gives the top-tier cap a run for their money by offering flagship specs at a much more affordable price. These caps feature a baffle & -10 orb (7/8"-14 straight thread o-ring style port) for use w/ an o-ring fitting (or port hose end) & an hose to the catch tank or pcv.

Why We Like This: