K-711 making a comeback

[gn7]

what caused the filter to collapse ? and what brand of element is that?

Its a Professional Products Stainless Steel Mesh filter.
Any number of things 3.5" or 4.25" filter instead of the 4.5"
10 micron element instead of the 45 micron
Heavy straight weight oil on a cool Parker morning fire off and no bypass in the filter or block
All of the above.

When that happens, it happens in less than a blink of the eye. Like a pin on a balloon
Zero pressure in the block(and inside the filter element) in rush of molasses thick oil on the outside of the element trying to get thru the filter. The filter is designed to flow oil thru the element with about 8lbs difference between the pressure coming in, and the pressure in the block.
Make that pressure 100lbs and zero, and this can be the result.
The easier it is for the oil to pass thru the filter, lighter oil or larger micron, the less likely this happens.

ANY filter can do it. Cold morning, molasses in the oil pan, no bypass, and jiggy with the throttle is all it takes.
A blown alky deal starting off a squirt bottle can be hard to control the starting Rs. .001 second is all it takes.