Bob,
The Wix 51307 should NOT be used in either a 455 or 403 as it has a bypass valve.
http://oilfilterdata.com/index.php?view=filter_info&model=51307
The oil filter adapter of the 455 and 403 has a bypass valve in it:
http://www.gmcmhphotos.com/photos/455-2f-403-engine-oil-flow-path/p60140-oil-filter-base1.html
Nor should any other filter with a bypass valve; I learned that from presentations made by Dick Patterson.
The Fram PF25 does not have a bypass valve, however, before I used on I'd cut it open and see what the total area of the filter
element was.
Here's a link that shows a Wix 51049 filter element unfolded and stretched out;
http://www.gmcmhphotos.com/photos/455-2f-403-engine-oil-flow-path/p53487-wix-51049-element.html
Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces] On Behalf Of Bob Dunahugh
Sent: Monday, May 14, 2018 9:43 PM
To: gmclist
Subject: [GMCnet] Tid Bits. Engine oil filter lengths. There are shot, and long.
Someone asked me today. What's the longest oil filter for our engines. These are the ones that I know. Two of the short ones that
I wouldn't use. Fram PH25, and WIX 51307are 3.5 inches long. WIX 51049 is 5 inches long. I'm sure that there are more brands that
are 5 inches long. Bob Dunahugh
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