4Rescue
Expedition Leader
Yeah, no kidding. :yikes:Kermit said:Dave the Toyota geek to the rescue. (it's a compliment)![]()
From one Dave to Another: Dave you are awsome. You should write a freakin' book about Toyotas.
Cheers
Dave
Yeah, no kidding. :yikes:Kermit said:Dave the Toyota geek to the rescue. (it's a compliment)![]()
I'd guess 12mm-1.25, just like the 22R. The OEM 22R bolts have about 16 full threads IIRC.Kermit said:what is the thread pitch and count on a cylinder head stud from an '83 20R....?
Heartily concur.AndrewP said:snip.......
Regarding the original post, I would avoid Fram.
Nippondenso and Denso are one in the same (you also see ND on OEM stuff, NipponDenso). They are a Japanese company, the analog of a Delco in that they are a supplier to OEMs. They have manufacturing plants here in the USA and are a major supplier to Toyota but they are also a supplier to most of the manufacturers. Denso does AFAIK sell filters directly under their own name, at least they do with other parts like ignition and O2 sensors and that like. So it's certainly possible that Rock is selling a Denso filter directly, dunno.Scenic WonderRunner said:Dave,
Maybe you know.
The Rock Auto website shows a Nippon oil filter. Is this Nippon/Denso or is this now different?
And does Denso make oil filters for Toyota?
Do you understand this mystery?
..........and! Would the Nippon filter be OK.
You are running it on a 2F? Mine is a 22R-E, might be a difference in oil pumps or mine's just weak? I dunno, my gauge usually runs at about 2/3 of sweep on the highway with 10W30 and with the bigger filter it ran a hair under 1/2 sweep. Since at 1/3 line I have about 15 psi and at 2/3 line it's like 50 psi, there is a whole lot of undetermined grey area on the stock gauge... Could be 1/2 sweep is really 45 psi. Shrug. Not commenting on using them, just noting what I saw. Toyota before about 1987 used the big filter on the 22R, so there's really nothing wrong with it at all. Not sure why they decided it needed to be changed, but it was a spec change because the oil capacity also must have gone from 5 quarts to 4.5 quarts in the book when the filter shrank.AndrewP said:I've never seen any oil pressure difference based on which filter I use. Plenty of difference though based on the viscosity of oil I'm running. I have even run a Ford Motorcraft FL1A filter on my FJ40.
DaveInDenver said:You are running it on a 2F?
Oh, I think I understand the miscommunication here. We might be talking about two different things. I saw a change in oil pressure going from a small filter to a large filter. Toyota calls out for a physically smaller filter (as on the left) currently on the 22R, it about 1/2 a quart smaller in volume than the 2F (i.e. FL1A and the like) filters. I don't see any oil pressure changes going from Denso to Wix to Purolator to Motorcraft brands, within the same filter size. My thought is that the bigger filter having more volume causes a bigger pressure drop. The oil pressure sender is in the oil passage right below the filter on the 22R, so it's reading the pressure between the oil pump and filter. I also need to note that I never checked to see if I was starving the top end of oil, but I really sort of doubt it. Also lower pressure is not in itself a problem as long as there is sufficient flow. In fact lower pressure is good as long as there's enough. Pressure is the measure of resistance to flow, so high pressure could also just mean you have clogged oil passages or any number of other things.AndrewP said:Yep-running on a 2F. In the parts book for Motorcraft, it shows this filter for FJ40. They were on sale for $3 or so and I bought a few. I've used up the stock, but it is an OEM filter, and my 2F had no issues with it. Just outwardly, it seemed decently made.
Potentially less pressure drop across the filter with increased surface, but there's more enclosed volume. Two different mechanisms, no laws of physics broken here. The flow rate does not change coming up from the pump and the feeder oil passage, so pressure is inversely proportional to filter volume. However, OTOH, the differential pressure across the filter medium is a function of flow and pressure, the actual drop through the filter medium is probably not as sensitive as the change in volume. IOW, the smaller size filter is still sufficiently large as to not affect differential pressure across the filter for the oil pump and engine oiling design. But maybe my particular oil pump is marginal and the increased volume does make a difference in how much the pressure changes going from a smaller volume to a larger volume. The analogy would be the difference in a given compressor and 1/2" air line feeding a 2 cu-foot tank verses a 10 cu-foot tank. With air flowing out at some non-trivial rate, the pressure that the compressor & tank system would equalize to will be different. The inlet might be 100 psi, but the outlet pressure will likely be different between the bigger and small tank beyond some flow rate. At least that's what I chalked it up to. Might be complete bunk and just a coincidence.ntsqd said:Something just clicked in my head. Normally a bigger filter results in less pressure drop since the same volume of oil has a larger area to flow through. Bigger garden hose analogy. That is the prime argument in favor of the dual, parallel remote filter pads. Your results are contrary to that. I've no idea if that is an anomaly or not. Just interesting is all.
DaveInDenver said:Potentially less pressure drop across the filter with increased surface, but there's more enclosed volume. Two different mechanisms, no laws of physics broken here. The flow rate does not change coming up from the pump and the feeder oil passage, so pressure is inversely proportional to filter volume. However, OTOH, the differential pressure across the filter medium is a function of flow and pressure, the actual drop through the filter medium is probably not as sensitive as the change in volume. IOW, the smaller size filter is still sufficiently large as to not affect differential pressure across the filter for the oil pump and engine oiling design. But maybe my particular oil pump is marginal and the increased volume does make a difference in how much the pressure changes going from a smaller volume to a larger volume. The analogy would be the difference in a given compressor and 1/2" air line feeding a 2 cu-foot tank verses a 10 cu-foot tank. With air flowing out at some non-trivial rate, the pressure that the compressor & tank system would equalize to will be different. The inlet might be 100 psi, but the outlet pressure will likely be different between the bigger and small tank beyond some flow rate. At least that's what I chalked it up to. Might be complete bunk and just a coincidence.