I'm registered in Arkansas currently. If/when I move back to Washington state, I probably won't need to get smog checked since my Arkansas title shows a weight, even if it's probably badly inaccurate. Over a certain weight for old diesels still require the test in WA.
Oil change interval
- Thread starter raydav
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I'm registered in Arkansas currently. If/when I move back to Washington state, I probably won't need to get smog checked since my Arkansas title shows a weight, even if it's probably badly inaccurate. Over a certain weight for old diesels still require the test in WA.
Well, WA let's you get a waiver if you spend something like $350 minimum trying to correct an emissions problem and it still fails, so it's not a death nail if it fails, but it does add to cost of ownership. I bought a 2003 car in Texas and it passed WA emissions just fine but it was a clean, Corolla engine (Pontiac Vibe) so yeah.
The_Josh_Bear
Full Access Member
I think you're getting too worked up about the emissions test... WA is an opacity test only for old diesels, aka the "snap test". (Dunno about new diesels)They just push the throttle quickly to the floor and see how dark the exhaust is with a special gizmo. That's it! At least it was a few years ago before I moved to unincorporated King County. No emissions requirement here. 
So if sitting in neutral and you snap the throttle unless it makes a cloud of black smoke you'll pass. Worst case turn the pump down and try again for $15.
So if sitting in neutral and you snap the throttle unless it makes a cloud of black smoke you'll pass. Worst case turn the pump down and try again for $15.
Macrobb
Full Access Member
This is also the whole purpose of the Hypermax Smoke Puff Limiter. The fact that it's also useful for other drivability factors is a side bonus.I think you're getting too worked up about the emissions test... WA is an opacity test only for old diesels, aka the "snap test". (Dunno about new diesels)They just push the throttle quickly to the floor and see how dark the exhaust is with a special gizmo. That's it! At least it was a few years ago before I moved to unincorporated King County. No emissions requirement here.
So if sitting in neutral and you snap the throttle unless it makes a cloud of black smoke you'll pass. Worst case turn the pump down and try again for $15.
raydav
Full Access Member
Back on the subject of oil filtration. I have a 0.060 orifice feeding a remote turbo. The return is to the oil fill neck, so I can see the volume, and it is substantial. How about I insert a 2 micron, oil filter in the turbo feed line?
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You can, but I would take a volume measurement at low temp, high temp, idle and 2500rpms with no filter then compare it with the filter installed, just to be sure you are not restricting flow.
raydav
Full Access Member
I would probably put a low pressure gauge across the filter. It would measure differential pressure in real time. Ideally the gauge would never move. If it does, it is because the filter is getting dirty. That is why I have a vacuum gauge after the air intake filter.
And no, at the moment, I do not know where to get a low pressure, cheap, differential pressure gauge.
But this should work.
https://www.grainger.com/product/MIDWEST-INSTRUMENT-1-4-FNPT-Differential-Pressure-3GVC1
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Two mechanical oil pressure gauges? Can’t have too many gauges in the cab
raydav
Full Access Member
Two gauges will work.
This is probably ideal.
https://www.grainger.com/product/MIDWEST-INSTRUMENT-1-4-FNPT-Differential-Pressure-3GVC1
https://www.ebay.com/itm/Differenti...tor-Midwest-Instrument-555A-3-5-/222787981816
Too many gauges? It is getting kinda busy here, I already have seven, and one is dual display.
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That’s a neat unit, but I think you’ll have more than 3.5 psi drop with even a fresh filter
raydav
Full Access Member
That gauge is one of a family. So, start with two cheap gauges to find a working range?
That would work
I'm due for oil change truck has 5.5k since last oil change,figured some one could ever explain further
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