The International Cessna 170 Association

Read somewhere recently that oil filter collapse will happen around 60-65 hours of engine time without an oil change. I assume this is due to clogged pleats. Trying to find the article to pass along to a couple of buddies who just bought an M5-235 Maule. Just need it for reference. Nobody I know would go beyond 50 hours without an oil change. (let's hope not). I subscibe to Light Plane Maintenance and thought it might have been in last month's issue, but no luck. Any help would be appreciated.

I would hope that the bypass valve would be designed to open before the filter collapses.

Miles

This oil filter collapse business sounds like a lot of BS to me. Internally they're about the same as automotive filters and those will run for ten thousand miles and never collapse. I'd estimate sixty five hours equivalent to maybe something just under about five thousand miles if you were driving pretty damn fast. Ford Motor Company now advises oil change interval at seven thousand five hundred miles. Thats one hundred fifty hours at an average speed of fifty miles per hour.

Can the oil pump system even generate enough pressure / suction to collapse one of those things?
The metal is fairly thick, and in a cylindrical shape they're pretty strong ... I would think that the gasket or something else would give before the thing would collapse...

T.

If a spin on filter collapses it's most likely due to the use of an incorrect filter.
Filter adaptors come in two versions....internal by-pass....and non by-pass. Non by-pass adaptors must use a filter with an integral bypass such as a Champion 48108 or 48109. Internal by-pass adaptors can use the 48110, etc.
Use of a non-by-pass filter (48110) with a non-by-pass adaptor can eventually lead to a collapsed filter....oh probably about 1 or 2 thousand hours.... or sooner if the engine has other issues.
Use the correct filter. Change oil and filter at the recommended times. (TCM recommends a 100 hr spin on filter change with 50 hour oil changes, but I never liked the idea of running clean oil thru a dirty filter, so I change them simultaneously....at 25 hrs.)

I have seen a few filters collapse. Not on a 170 and not because it was the wrong filter, nor was it clogged (not by crud anyway). Cold weather -40ish and not enough warm-up. I know it happened on Navajo's and I think on a 207.
Hell my memory is starting to go

mit...that was a collapse of the "can"...right? Due to extreme suction applied from the pump?

(The examples I was thinking of were internal collapses of the paper element. Filer by-pass valves operate as a function of differential pressure across the filter-element and would be unlikely to collapse a can. But I can see where cold oil, thick-as-grease could collapse a can.)

gahorn wrote:mit...that was a collapse of the "can"...right? Due to extreme suction applied from the pump?

(The examples I was thinking of were internal collapses of the paper element. Filer by-pass valves operate as a function of differential pressure across the filter-element and would be unlikely to collapse a can. But I can see where cold oil, thick-as-grease could collapse a can.)

Yes the can collasped and crushed the filter I forget which P/N filters they where.

This thread started by talking of filter element collapse due to 60 to 65 hours of use with, I surmised, the same oil. I just don't think that will ever happen without some other serious problem of which a collapsed filter would be the least of the problem.