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Models: 1998 Ram (BR/BE) with 24 valve Cummins
1998 Cummins engines were built with an incorrect dipstick calibration. This incorrect marking causes an overfilled condition of about 1 1/2 quarts when at the top end of the safe zone on the dipstick. The overfill is not damaging to the engine, but can cause:
1 each 05014562AA Dipstick (Cummins # 3935648)
NOTE: The Cummins part number is stamped on the dipstick. The incorrect number is #3944594
Repair: Replace the dipstick and correct the oil level.
The total capacity of the 24 valve engine crankcase is 10 quarts plus 1 for the filter. The level normally reads in the mid upper section of the safe zone when full. It does not have to be filled to the top edge of the safe zone for the level to be correct. (Figure 1)
To: Turbo Diesel Mailing List - http://www.tstproducts.com
Date: Thu, 21 Jan 1999 13:27:10 -0500
From: "darrell j. skoff" <firstname.lastname@example.org>
The number on my stick matches the one in question - 3944594. When 11 quarts are placed in the engine the correct reading is in fact shown on my stick. I would believe that the above number is the correct one. My engine was built in Jan. of 98.
Date: Fri, 22 Jan 1999 19:03:45 -0500 (followup)
Last month while changing oil on my 98 ISB, I performed an overnight extended drain. When 11 quarts were added, the correct amount was read on the dipstick. All oil checks to date show the proper reading. It is my belief, that not all dipsticks with the part number in question were calibrated incorrectly.
Date: Thu, 21 Jan 1999 18:35:11 -0500
From: "Roger J. Nolfe" <email@example.com>
I have the so-called incorrect dipstick part number in my Ram, but decided to wait until I changed the oil to see where it came to on the dipstick. I changed oil and filter, (11 quarts exactly) and checked it several times over the next few days. Oil level shows up exactly on the full mark, so I'm inclined to leave mine as-is.
Date: Fri, 22 Jan 1999 20:09:03 -0500 (followup)
I let it drain for at least 30 minutes and yes I'm sure I put in exactly 11 quarts. Maybe some of us should measure the dipstick and see if they are indeed different lengths. My "wrong" dipstick, part number 3344594 measures 45 5/8" from tip to the bottom of the round plastic housing. The full mark is 4 1/2" from the tip. I think Darrell is right...probably not all of the dipsticks are calibrated wrong.
Date: Thu, 21 Jan 1999 18:24:34 -0600
From: Richard Graham <firstname.lastname@example.org>
Mine also has the incorrect part number dipstick. Checked it today. When mine has 11 quarts in it, it is exactly halfway between the marks. This after setting for a couple hours.
Date: Fri, 22 Jan 1999 11:24:14 -0600 (followup)
Just got back from my dealer and here are the Chrysler part numbers they gave me:
Date: Sat, 23 Jan 1999 15:59:45 -0800
From: "Scott D. Sproul" <email@example.com>
> I think Darrell is right...probably not all of the dipsticks are calibrated wrong.
you may be right, I had my dipstick changed out with the new one a week ago when I went in for the NOX recall.
So I asked if I could compare the two, put them side to side and they
were the exact same length 45 1/8" the only difference was the calibration
markings. Full on the new one is 4" from bottom, full on the old one is
4 1/2 from bottom. so your dipstick being 45 5/8 long - 1/2" longer than
my new one - would put your full mark right where the new one is.
Scott D. Sproul mailto:firstname.lastname@example.org
Thanks to Bob Bergevin for providing this TSB information
This page was edited on: May 3, 2004