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Old 02-11-2019, 08:36 PM   #1
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Oil Sample

I ran into a problem today trying to draw an oil sample on my Cummins 450 hp to send off for analysis. The tube that went into the dipstick did not travel far enough down the hole to reach the oil before bottoming out. I tried , tried and tried some more, but no success. Am I not holding my mouth right or something? Any suggestions will be appreciated.
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Old 02-11-2019, 09:11 PM   #2
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Does it have a taper cut on the end? Try to take the curve out of the hose for the 1st couple feet. Sometimes you have to kind of corkscrew it in. Otherwise, if you are changing the oil you can catch a sample mid stream. A bit messy but that's the way our service guys do it.
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Old 02-11-2019, 09:23 PM   #3
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I have that problem with my Cummins. I cut the hose end with two tapers and still gave trouble. Twisting and pushing helps.
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Old 02-12-2019, 02:12 AM   #4
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Take hose to hardware store and buy longer length?
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Old 02-12-2019, 03:41 AM   #5
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Oil Sample

No, it is not the length of the test tube. If underneath the oil pan you can see how the tube turns and reduces in size. The test tube regardless of length does not go in. Catch amount needed when draining oil. There is a valve fitting that can be placed in drain plug to take sample.
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Old 02-12-2019, 03:59 AM   #6
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In the future sample during oil changes

Samples are more about the health of your engine rather than the oil
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Old 02-12-2019, 05:17 PM   #7
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You might consider installing a Fumoto Drain Valve. It will make it easier to get samples in the future, drain your oil and you won't have to worry about torque and stripping treads.

https://www.fumotooildrainvalve.com/
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Old 02-12-2019, 05:45 PM   #8
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yep last 2 replies. Dont try to extend oil change intervals. It wont pay off..
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