LT1 Oil Filter ,PF51 or PF52???
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Drifting
Joined: Jul 2002
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From: Olathe, KS USA
LT1 Oil Filter ,PF51 or PF52???
Hello, first posting . I noticed in my service and owner manuals call for AC PF51 . The AC book @ AZone calls for PF52 and is currently installed on car . I have had no problems with #52 but was wondering whats the diff. Also does anybody use the high $ filters from K+N or Mobil 1 are they that much better Thanks for any info. :seeya
Le Mans Master
Joined: Mar 1999
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From: delmont pa
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Re: LT1 Oil Filter ,PF51 or PF52??? (C4Crazy787)
one of the filters has a check valve to prevent oil drainback when the engine is shut off. i think the PF51 is no longer made because it was the one without the anti drain back valve. filter that mount straight up and down,like a chevy V-8 engine do not drain out but using a filter with the anti drainback valve will cause no problems. i found this out years ago on the 151 iron duke that chevy installed in some cars,the PF51 would empty out and when you started the engine you would hear bearing rap till the filter filled up and allowed full oil pressure. :chevy
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From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
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Re: LT1 Oil Filter ,PF51 or PF52??? (clem zahrobsky)
I use the PF52 or the Fram equivalent.
Safety Car
Joined: Aug 2000
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From: Easton CA
Re: LT1 Oil Filter ,PF51 or PF52??? (C4Crazy787)
Use the PF52 if the two choices you list are the only ones you will consider.
I used to use AC Delco Ultraguard (UPF52) until I could no longer find them for a reasonable price, I now use the K&N HP-2001.
BTW... welcome to the board.
[Modified by Oly, 6:32 PM 7/14/2002]
I used to use AC Delco Ultraguard (UPF52) until I could no longer find them for a reasonable price, I now use the K&N HP-2001.
BTW... welcome to the board.
[Modified by Oly, 6:32 PM 7/14/2002]
Melting Slicks
Joined: Apr 2000
Posts: 3,198
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From: Northern CA
Re: LT1 Oil Filter ,PF51 or PF52??? (C4Crazy787)
The box for the AC Delco PF52 says that it replaces the old PF51. As mentioned above I think the only difference is the anti-drainback valve.
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Race Director
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From: Melbourne Florida
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Re: LT1 Oil Filter ,PF51 or PF52??? (C4Crazy787)
I used the PF52 but have switched to the Delco Gold (Ultraguard)..it's a bit pricier..9.95 vs 2.99 but for 7 bucks more I just feel better..I get em' at Pep Boys..BTW welcome to the forum...
Burning Brakes
Joined: Aug 2000
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From: Cincinnati OH
Re: LT1 Oil Filter ,PF51 or PF52??? (Shylor)
Why worry about the anti drainback? The filter is not mounted sideways, so oil stays in the filter by gravity.
Pro
Joined: Mar 2001
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Re: LT1 Oil Filter ,PF51 or PF52??? (JasonL)
The 52 was introduced at first for V-6 engines because of being mounted at an angle. They added the anti drain back valve. That's what made the 51 into a 52. I think all filters should have them.
