Comments by "crazypj" (@1crazypj) on "Does Pre-FILLING The Oil FILTER Cause Engine DAMAGE?" video.

@nspro931 You are joking about not filling filter? 'Dirt' smaller than ten micron is going around engine anyway as filter only designed to remove 95~98% of 10 micron particles. Filter bypass will open at various times on any engine that has a paper element filter.
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@alanmerritt860 Never seen a filter fitted like that, but, if it was 'upside down' the filter material would be pre-soaked so take slightly less time to actually build pressure in bearings and journals. Personally, I don't like pushing air through oil galleries.
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@nspro931 Nope, but wearing things out faster will obviously improve sales
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@alanmerritt860 Never seen under the hood on one. I did work on construction equipment for over 8 years and things were often stupidly placed needing modified tools (carried gas cylinders so heated and bent some decent tools, but, not my Snap-On) Filters were almost always 'right way up' or stuck on the side somewhere, often remote mounted (hydraulic, fuel and engine oil) About the weirdest was when I worked in a BMW (motorcycle) dealers. The 'R'75 and R90 series had a two piece oil filter in side of crankcase to allow it to 'bend' over the frame tube.
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@nspro931 I've worked as a 'site service engineer' on construction equipment and know that 'some people' will fill oil from a bucket of sand, remove air filters because dust clogged them and other stuff, so, I can understand the reasoning Bearings 'full of oil' is no substitute for the oil wedge that forms with oil under pressure, particularly on modern engines with smaller diameter and narrower bearing surfaces compared to even 90's engines. Cat has large diameter wide crank journals plus the motor probably tops out between 1800 and 2300 rpm (depending on capacity and application) I'll continue to fill filters from fresh bottles and only use previously opened ones for topping up after oil change
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@nspro931 Yeah, wasn't the best explanation, should probably have waited until I was awake. The wedge is due to shaft rotation not oil pressure. I know 'dippers' on plain bearing cranks have been around for decades, Honda used them with roller bearing cranks spinning at 9,500rpm in 1959 . (I trained as a machinist, worked as tech, foreman, 'service manager' in motorcycle dealers then moved on to construction equipment as money was a lot better) I've worked with and on big diesels (mainly multi cylinder Deutz on pumps and generators) plus JCB and Case in 'smaller' varieties
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The drill is probably spinning pump faster than the cam gear would by a substantial amount? Majority of starter motors will spin crank ~300rpm, cam runs at half crank speed and gear from cam to pump may or may not step up gearing? The time to build pressure from startup could be very variable but in my experience 5~10 seconds from initial cranking to when oil light goes out (when I've tested which isn't often as I've almost always filled or soaked filters when fitted into a housing with flat cover plate from underneath, mostly 1970's~80's motorcycles) Oil filters 'should' (but don't) filter all particles smaller than 10 micron, bypass in filter opens when pressure gets too high so UNFILTERED oil goes direct to oil galleries. Most efficient filtration is high rpm centrifugal filter, Honda used it on motorcycles from 1959 through 1977 when idiots didn't like a filter they couldn't understand and cartridge (1969 CB750, 1974 CB350F) or spin on (1978) canister became normal. I found vid interesting as I've never seen anyone test this before and relied on my own experience from years of working in dealers.
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@Johnno47 🤣
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