little filter
Thread Starter
Intermediate
Joined: Apr 2011
Posts: 36
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little filter
I had the vett on ramps and oil drained before i remembered i had not picked up a replacement oil filter....duhh,,S0 in the beater i go to our gm dealer to get a filter.I tried to find the part number in the manual but gave up looking --so just asked for a filter for a 6,2.The counter girl hands me this tiny filter.aI looked at it and said this can not be the correct filter for that large engine...but yepp,iti is,[I] alwaays thought that a large filter was better especially for a large engine.But once i saw the spot it fits in it made sense.Now time to store her..
Race Director
Joined: Sep 2000
Posts: 11,143
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From: Missouri City, TX
Safety Car
Joined: Aug 2010
Posts: 3,600
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From: F'burg VA
St. Jude Donor '13 thru '20,'22,'24 thru '26
We got three Chevys and all use those small filters: PF46E, PF47, UPF-48R
They all look just like the other (dimensionally anyway), why can't they make just one filter that works for all of them?
They all look just like the other (dimensionally anyway), why can't they make just one filter that works for all of them?
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
PF46 does not have a bypass valve(it is located in the engine above the oil filter) and the PF 48 has the bypass valve as the later engines do not have a bypass valve in the engine and the oil filter MUST have the bypass valve. Even though the two look the same, the threaded mounting hole has a different diameter and different thread pitch between the PF46 and the PF48 series filters, thus they are not interchangeable. I don't know what the PF47 is.
