I always fill my oil filter first before installing it when doing an oil change. I can't believe how many people say this is a bad idea. We've proven on a dyno it takes a few seconds for the oil pressure to come up if you start with a dry filter. This causes excessive wear/scratch's on the crankshaft main bearings, as they will momentarily touch together due to no oil film that can protect this. Filling the oil filter, and starting the engine will deliver oil pressure instantly. I just thought I'd give others this tip if their installing a dry filter like shown in so many oil change videos..
Priming your oil filter when doing an oil change.
- Thread starter tacojoel
- Start date
JayQQ97
MW surVivor ... clutched. 350k on the 0D0
umm yeah there would be oil film (albeit minimal) left from oil change unless this 0W synthetic completely drains and leaves it all dry, which i would doubt but IDK
my rig the oil filter is at an awkward upward angle so cannot really prefill without backDrain and making a much bigger mess than needs to be around the area and onto the splash shield undercovers
i doubt that the monkey changers at the dealer doing my rig OCI the past 27 years have EVER prefilled it but who would know but them, right?
my rig the oil filter is at an awkward upward angle so cannot really prefill without backDrain and making a much bigger mess than needs to be around the area and onto the splash shield undercovers
i doubt that the monkey changers at the dealer doing my rig OCI the past 27 years have EVER prefilled it but who would know but them, right?
Yep, but there's still many do it yourselfers, and video's that don't practice this, yet they gotta change their oil 2-3 times sooner than it needs to be. Little to they know not filling their oil filter every time is likely doing more harm than good. Would you want to wait 5 seconds for your engines oil pressure to come up every time you install a dry oil filter? Where's our toyota god on this?
Oil pressure begin's as soon as you start turning the crankshaft via the starter. The crankshaft turns the oil pump which in turns supplies oil pressure to all the various critical engine internals. When no oil is supplied even for a few seconds, thats when engine wear is most likely to take place.
I always pre-fill the new fuel filter on my diesel tractor, to prevent an injector airlock. But never tried to do that to a new oil filter on my 2nd gen 4.0 V6. As Jay said, the oil filter is upside down so it is rather impossible to attach it full of oil to the engine. I do remember my old '01 1st gen Taco having the more conventional oil filter with the attachment up, but don't remember anyone saying it was important to pre-fill when spinning it on. I do think the "upside down" oil filter makes for a much less messy change-out, as long as you allow the engine to be idle for a time to allow the filter to drain on its own.
JayQQ97
MW surVivor ... clutched. 350k on the 0D0
you must've had the 4 cyl Gen1?
I could never see an upside down oil filter as on the 4.0 unless the oil pump is in a location that doesn't matter. I had small block chevy's, and pontiac engines....I always filled the oil filters first if doing an oil change. My tundra 4.7 was a pita with a horizontal mounted filter...I'd fill it partially not to make a mess when having to install it back.
It was a 6 cyl, but it's quite possible my oil filter memory back to the early 2000's is a bit upside down.
It's a bit hard for me to imagine, but quite a few people out there shouldn't be changing their vehicle's oil and filter.
When my brother first tried to service his '60 Biscayne, he drained the manual transmission 'grease' by mistake (ignorance).
Some folks simply have zero mechanical ability.
Yeah, I've got friend like that. He's a chemist working for a plant down in texas. Before he got a locative job there, he work at a local company here. Smart as all hell mathematically, but place a tool in his hand to remove a carburetor, and he'll seriously hurt himself.
Imo, lack of mechanical ability is one thing, stupidity is another. If both, thats a real problem.
Imo, lack of mechanical ability is one thing, stupidity is another. If both, thats a real problem.
Nevada Mike
Well-Known Member
I’ve always filled my oil filters before installing them. That’s the way I was taught. I’ve never heard of putting a dry filter on. If people want to do that to their vehicles that’s their choice. Why someone would do that is a mystery to me.
