Service Manual
Crankcase Blowby, Measure ISB, ISBe and QSB (Common Rail [...]
Page 14-40 Section 14 - Engine Testing - Group 14
To buy Cummins Parts and Service Manuals, Training Guides, or Tools go to our website at https://store.cummins.com
Turbocharger Blowby Contribution:
NOTE: For engines equipped with dual turbochargers, the Turbocharger Oil Drain
Line Isolation Test may need to be conducted twice to determine which turbocharger
is contributing high blowby. The first test should be conducted with both turbocharger
drain lines isolated. If the blowby contribution is above specifications, conduct a
second test with only the low pressure turbocharger oil drain line isolated. If the
blowby contribution is within specification, inspect the compressor and turbine areas of
the low pressure turbocharger for signs of an oil leak. Replace the low pressure
turbocharger, if necessary. If the blowby contribution is out of specification, replace the
high pressure turbocharger.
With the engine blowby service tool and water manometer or pressure gauge still
installed:
• Isolate the turbocharger, if equipped, to determine if the high blowby pressure is
due to turbocharger seal leakage.
• To measure the turbocharger blowby contribution, disconnect the turbocharger oil
drain line.
• Use the following procedure in the C Series Engines Troubleshooting and Repair
Manual, Bulletin 3666003. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the B3.9, B4.5, B4.5 RGT, and B5.9 Service
Manual, Bulletin 3666087. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the ISB and QSB5.9-44 Engines Troubleshooting
and Repair Manual, Bulletin 3666193. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the ISBe, ISB, and QSB (Common Rail Fuel
System) Service Manual, Bulletin 4021271. Refer to Procedure 010-045 in
Section 10.
• 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 010-045 in Section 10.
• Use the following procedure in the ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and
QSL9 Engines Troubleshooting and Repair Manual, Bulletin 4021418. Refer to
Procedure 010-045 in Section 10.
• Use the following procedure in the B3.3 and QSB3.3 CM2150 Service Manual,
Bulletin 4021540. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the ISC and ISL CM2150 Service Manual, Bulletin
4021569. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the ISB CM2100 and CM2150 Service Manual,
Bulletin 4021578. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the ISBe and ISDe CM2150 Service Manual,
Bulletin 4021597. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the ISLe CM2150 Service Manual, Bulletin
4021630. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the ISL G CM2180 Service Manual, Bulletin
4021649. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the ISF3.8 CM2220, ISF3.8 CM2220 AN and
ISF3.8 CM2220 IAN Service Manual, Bulletin 4021704. Refer to Procedure
010-045 in Section 10.
• Use the following procedure in the ISB4.5, ISB6.7, ISD4.5 and ISD6.7 CM2150
SN Service Manual, Bulletin 4022188. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the B4.5s and B6.7s Series Engines
Troubleshooting and Repair Manual, Bulletin 4095243. Refer to Procedure
010-045 in Section 10.
• Use the following procedure in the ISF2.8 CM2220, ISF2.8 CM2220E, ISF2.8
CM2220 AN and ISF2.8 CM2220 IAN Service Manual, Bulletin 4022178. Refer to
Procedure 010-045 in Section 10.
• Use the following procedure in the ISB6.7 Service Manual, Bulletin 4022254.
Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the ISB6.7 CM2350 B101 Service Manual,
Bulletin 2883567. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the ISB4.5 CM2350 B104 Service Manual,
Bulletin 4332646. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the ISB6.7 CM2350 B103 Service Manual,
Bulletin 4332641. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the QSB6.7 CM2350 B105 Service Manual,
Bulletin 4332778. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the QSL9 CM2350 L102 Service Manual, Bulletin
4332796. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the ISF3.8 CM2220 F110 Service Manual, Bulletin
4358480. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the ISL9 CM2350 L101 Service Manual, Bulletin
4310787. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the QSL9 M CM2250 L106 Service Manual,
Bulletin 4358343. Refer to Procedure 010-045 in Section 10.
• Use the following procedure in the QSB6.7 CM2350 B112 Service Manual,
Bulletin 4358498. Refer to Procedure 010-045 in Section 10.