NOTE: The location and type of crankcase breathers vary by engine configuration (Front Gear Train or Rear Gear Train) and/or engine application (Marine, Industrial, and Automotive).
Prior to measuring blow by pressure, check the crankcase breather tube for obstructions.
• Use the following procedure in the C Series Engines Troubleshooting and Repair Manual, Bulletin 3666003. Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the B3.9, B4.5, B4.5 RGT, and B5.9 Service Manual, Bulletin 3666087. Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the ISB and QSB5.9-44 Engines Troubleshooting and Repair Manual, Bulletin 3666193. Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the ISBe, ISB, and QSB (Common Rail Fuel System) Service Manual, Bulletin 4021271. Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the Industrial QSB3.9-30, QSB4.5-30, and QSB5.9-30 Series Engines Troubleshooting and Repair Manual, Bulletin 4021398. Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the ISC, ISCe, QSC8.3, ISL, 1Sle3, 1Sle4 and QSL9 Engines Troubleshooting and Repair Manual, Bulletin 4021418. Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the B3.3 and QSB3.3 CM2150 Service Manual, Bulletin 4021540. Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the ISC and ISL CM2150 Service Manual, Bulletin 4021569. Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the ISB CM21 00 and CM2150 Service Manual, Bulletin 4021578. Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the ISBe and ISDe CM2150 Service Manual, Bulletin 4021597. Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the ISLe CM2150 Service Manual, Bulletin 4021630. Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the ISL G CM2180 Service Manual, Bulletin 4021649. Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the ISF3.8 CM2220 Service Manual, Bulletin 4021704. Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the ISB4.5, ISB6.7, ISD4.5 and ISD6.7 CM2150 SN Service Manual, Bulletin 4022188. Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the B4.5s and B6.7s Series Engines Troubleshooting and Repair Manual, Bulletin 4095243.
Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the ISF2.8 CM2220E, ISF2.8 CM2220 AN Service Manual, Bulletin 4022178. Refer to Procedure 003-024 in Section 3. Refer to Procedure 003-026 in Section 3.
• Use the following procedure in the ISB6.7 Service Manual, Bulletin 4022254. Refer to Procedure 003-018 in Section 3.
• Use the following procedure in the ISB6.7 Service Manual, Bulletin 4022254. Refer to Procedure 003-018 in Section 3.
If troubleshooting a complaint of excessive oil out of the breather tube, it can be necessary to remove the breather components to clean and remove any lubricating oil buildup before performing any blow by measurements.
Check the engine oil level and, if necessary, proper calibration of the dipstick. If the level is too high, it can
cause a higher than normal blow by pressure and/or excessive carryover.
• Use the following procedure in the C Series Engines Troubleshooting and Repair Manual, Bulletin 3666003.
Refer to Procedure 007-011 in Section 7.
• Use the following procedure in the B3.9, B4.5, B4.5 RGT, and B5.9 Service Manual, Bulletin 3666087.
Refer to Procedure 007-011 in Section 7.
• Use the following procedure in the ISB and OSB5.9-44 Engines Troubleshooting and Repair Manual, Bulletin
3666193. Refer to Procedure 007-011 in Section 7.
• Use the following procedure in the ISBe, ISB, and OSB (Common Rail Fuel System) Service Manual, Bulletin
4021271. Refer to Procedure 007-011 in Section 7.
• Use the following procedure in the Industrial OSB3.9-30, OSB4.5-30, and OSB5.9-30 Series Engines Troubleshooting and Repair Manual, Bulletin 4021398. Refer to Procedure 007-011 in Section 7.
• Use the following procedure in the ISC, ISCe, OSC8.3, ISL, ISLe3, ISLe4 and OSL9 Engines Troubleshooting
and Repair Manual, Bulletin 4021418. Refer to Procedure 007-011 in Section 7.
• Use the following procedure in the B3.3 and OSB3.3 CM2150 Service Manual, Bulletin 4021540. Refer to
Procedure 007-011 in Section 7.
• Use the following procedure in the ISC and ISL CM2150 Service Manual, Bulletin 4021569. Refer to
Procedure 007-011 in Section 7.
• Use the following procedure in the ISB CM21 00 and CM2150 Service Manual, Bulletin 4021578. Refer to
Procedure 007-011 in Section 7.
• Use the following procedure in the ISBe and ISDe CM2150 Service Manual, Bulletin 4021597. Refer to
Procedure 007-011 in Section 7.
• Use the following procedure in the ISLe CM2150 Service Manual, Bulletin 4021630. Refer to Procedure
007-011 in Section 7.
• Use the following procedure in the ISL G CM2180 Service Manual, Bulletin 4021649. Refer to Procedure
007-011 in Section 7.
• Use the following procedure in the ISF3.8 CM2220 Service Manual, Bulletin 4021704. Refer to Procedure
007-011 in Section 7.
• Use the following procedure in the ISB4.5, ISB6.7, ISD4.5 and ISD6.7 CM2150 SN Service Manual, Bulletin 4022188. Refer to Procedure 007-011 in Section 7.
• Use the following procedure in the ISF2.8 CM2220E, ISF2.8 CM2220 AN Service Manual, Bulletin 4022178.
Refer to Procedure 007-011 in Section 7.
• Use the following procedure in the ISB6. 7 Service Manual, Bulletin 4022254. Refer to Procedure 007-011
in Section 7.
