Service Manual

Crankcase Blowby, Measure ISB, ISBe and QSB (Common Rail [...]
Page 14-38 Section 14 - Engine Testing - Group 14
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For ISB CM2150 engines that have the crankcase
ventilation filter located at the rear of the engine, use the
following steps to connect the blowby measurement tools.
• Disconnect the crankcase ventilation line from the
crankcase ventilation filter housing. Plug or cap the
crankcase ventilation filter housing.
• Connect the appropriate blowby service tool to the
crankcase ventilation line exiting the flywheel housing.
Connect a water manometer, pressure gauge, or
transducer to the blowby service tool.
For ISC and ISL CM2150 and QSL CM2250 engines, use
the following steps to connect the blowby measurement
tools.
• Remove the oil fill cap from the rocker lever cover.
Install an oil fill adapter, Part Number 3990099.
• Connect the appropriate blowby service tool to the
outlet of the oil fill adapter. Connect a water
manometer, pressure gauge, or transducer to the
blowby service tool.