How well do cartridge filters seal?

[Cyoungso1]

I have been pondering this topic since we got our Toyota that uses cartridge filters. The last vehicle I had with these was a 65 land rover.

The Toyota filter, and the denso, use a hard plastic ring against the bare metal of the filter housing.

How well does this seal?

The Champ/Supertech uses the hard plastic end cap, same deal

Only the proselect I picked up has pliable ring that should seal well.

 

[ZeeOSix]

The Toyota filter, and the denso, use a hard plastic ring against the bare metal of the filter housing.

How well does this seal?

Probably not a perfect seal. The Toyota TRD cartridge filters have a seal IIRC.

 

[RooflessVW]

They seal well enough

 

[Passport1]

I've had a couple of vehicles with cartridge filters and they always made a happy

 

[PimTac]

If you are using OEM Denso it should seal fine.

 

[vavavroom]

Permanent 5% bypass mode?

 

[ZeeOSix]

OP ... the Toyota TRD filters have a nice seal on the end caps.

 

[CR94]

The endcapless Toyota (Denso) cartridges are pliable enough I wouldn't worry about them bypassing. Ones with hard plastic endcaps (e.g., Fram) are probably almost as good, as long as they're reasonably accurate geometrically.

Then there were the visibly skewed circa 2012 Purolators I bought... In other words, the (hypothetical) centerline through the centers of the end caps was not perpendicular to the faces of the end caps. Whether that resulted in significant bypassing was not easy to figure out, considering that the Purolator center holes fit less snugly than others around the center tube, and that the surfaces which the end caps press against inside the Toyota filter housing are rigid at one end, and free to tilt slightly at the other end.

 

[blufeb95]

If they don't have a pliable seal it's not much difference than how the leaf spring is in most spin-on filters there's usually not a seal between the leaf spring and the media cartridge

 

[ZeeOSix]

If they don't have a pliable seal it's not much difference than how the leaf spring is in most spin-on filters there's usually not a seal between the leaf spring and the media cartridge

Only filter I've seen with a non-metal seal between the leaf spring and metal end cap is the Ultra. Sealing there helps the efficiency IMO, and could be why metal-on-metal sealed filters aren't real high efficiency.