AC Delco Oil Filter PF63... Questions on Filter Revisions....

SoCal Angler · October 9

I read this over on the GMC Terrain forum today. Not sure if any of this correct, but I thought I'd share on this forum for some input. There are three different part numbers so that tells me there are three mods/generations of the same part.

I purchased a few of the PF63 filters over at Wal-Mart earlier this year....I'll need to check the part numbers. My truck had its oil changed at GM dealer in July...I'll climb under my truck and check for part number there as well.

"I'm sure many are aware that the early ACdelco PF63 [89017525] was upgraded to the PF63E
Then the PF63E, was superseded, back to the PF63 [12731742] in 2021? with a higher check valve of 22psi.

In 2024, it was again upgraded to the [12735811], keeping the bypass psi @22, but increasing the diameter of the intake ports dramatically, which allows a higher volume of oil flow to be filtered.
My local A-Z, had both in stock, and could see the difference first hand.

Being a lifelong GM fanatic, I always used AC-Delco, especially when under warranty and never had one fail or lost an engine."

Edited October 10 by SoCal Angler

revrnd · October 10

I just purchased a 2024 Silverado 2500HD w/ the 6.6 L gasser motor. The owner's manual lists the ACDelco PF63 or a GM12707246 filter. Is this another new version?

redwngr · October 10

Duramax Diesel Engine Oil Filter Update for 2023

September 20, 2022

The PF63 engine oil filter (Fig. 5) is the new recommended filter specification for 2020-2023 Silverado 2500HD/3500HD, Sierra 2500HD/3500HD, Express, Savana; and 2019-2023 Silverado 4500/5500/6500 models equipped with the 6.6L Duramax diesel engine (RPO L5P, L5D).

Fig. 5

The PF63 engine oil filter will be the factory-installed filter for applicable 2023 models equipped with the 6.6L Duramax diesel engine (RPO L5P). The current PF26 engine oil filter also is compatible with these diesel engines. (Fig. 6)

Fig. 6

The PF63 filter is 3/4 inches (19 mm) narrower than the PF26 filter, but it has a taller pleat height, which maximizes volume efficiency and cold flow performance. (Fig. 7)

Fig. 7

Service Information and the Parts Catalog will be updated shortly. For more information and part numbers, refer to #PIP5870.

newdude · October 10

Yes, the e-Core filters were just redesigned. Baseplate tin was eliminated, some improved construction internally.

Nothing wrong with using the PF63E or the now "dropped the E" versions, both are acceptable. Heck, even if you found old stock of the pre E filters from when the PF63 came out you can use those.

newdude · October 10

40 minutes ago, revrnd said:

I just purchased a 2024 Silverado 2500HD w/ the 6.6 L gasser motor. The owner's manual lists the ACDelco PF63 or a GM12707246 filter. Is this another new version?

Just construction changes is all. Still the PF63, same specs just updated design which means new 8 digit part #.

MaverickZ71 · October 10

Edited October 10 by MaverickZ71

Grumpy Bear · October 10

What is it about the nature of a "Positive Displacement Pump" that people don't understand?

:dunno:

lineman1234 · October 10

Im good. 18,600 miles and the motor still runs, very, very smoooooth.

Just changed oil and cleaned, replaced filter 3 days ago.

revrnd · October 10

10 hours ago, MaverickZ71 said:

New filter is lighter due to the 'lightening holes'...

Pryme · October 10

2 hours ago, revrnd said:

New filter is lighter due to the 'lightening holes'...

Should give the truck at least 10mpg more right? Ha

MaverickZ71 · October 10

54 minutes ago, Pryme said:

Should give the truck at least 10mpg more right? Ha

Should be good for at least 10 hp on the K&N scale.

MaverickZ71 · October 10

4 hours ago, Grumpy Bear said:

What is it about the nature of a "Positive Displacement Pump" that people don't understand?

As opposed to a negative displacement pump? Whatever they call it, we just assume that a pump will move a fluid as needed.

Grumpy Bear · October 10

Just now, MaverickZ71 said:

As opposed to a negative displacement pump? Whatever they call it, we just assume that a pump will move a fluid as needed.

As opposed to a centrifugal pump whose output varies with head pressure (backpressure).

Positive displacement means exactly what it says it means. It moves an exact amount of oil per cycle. Output varies with speed not pressure. Pressure drop across the filter will change but volume remains a constant. Plugged filter or high resistance just puts the filter in bypass. If you close the discharge on a positive displacement pump one of two things happens. 1.) IF it lacks the power to overcome the resistance it stalls. 2.) IF it has the power to overcome the resistance it breaks something.

Our trucks have a variable displacement Positive displacement vane pump. Volume is controlled by the solenoid physically changing the pumps swept volume and it by the ECU that gets its input from the end of the oil circuit. Even that is crude. It has a programed speed to switch between two volumes. It does not 'throttle'.

MaverickZ71 · October 10

2 hours ago, Grumpy Bear said:

As opposed to a centrifugal pump whose output varies with head pressure (backpressure).

Positive displacement means exactly what it says it means. It moves an exact amount of oil per cycle. Output varies with speed not pressure. Pressure drop across the filter will change but volume remains a constant. Plugged filter or high resistance just puts the filter in bypass. If you close the discharge on a positive displacement pump one of two things happens. 1.) IF it lacks the power to overcome the resistance it stalls. 2.) IF it has the power to overcome the resistance it breaks something.

Our trucks have a variable displacement Positive displacement vane pump. Volume is controlled by the solenoid physically changing the pumps swept volume and it by the ECU that gets its input from the end of the oil circuit. Even that is crude. It has a programed speed to switch between two volumes. It does not 'throttle'.

You mean 2-speed pump on the 2014-after trucks and not before? That's the reason the 2007-2013s use PF48s and 2014-2024+ use PF63s?

Grumpy Bear · October 11

16 hours ago, MaverickZ71 said:

You mean 2-speed pump on the 2014-after trucks and not before? That's the reason the 2007-2013s use PF48s and 2014-2024+ use PF63s?

More like two different displacements but the same idea. On that second question :dunno: