ENGINE AR 7W8648 - Caterpillar

Crankcase (Crankshaft Compartment)
Table 1
Tools Needed    
Part Number    Part Description    Qty    
8T-2700     Blowby/Air Flow Indicator     1    Pistons or rings that have damage can be the cause of too much pressure in the crankcase. This condition will cause the engine to run rough. There will be more than the normal amount of fumes rising from the crankcase breather. This crankcase pressure can also cause the element for the crankcase breather to have a restriction in a very short time. This crankcase pressure can also be the cause of any oil leakage at the gaskets and at the seals. These areas would not normally have leakage.Note: The electronic service tool can be used to measure crankcase pressure.
Illustration 1 g00286269
8T-2700 Blowby/Air Flow Indicator The 8T-2700 Blowby/Air Flow Indicator checks the amount of blowby. See Special Instructions, SEHS8712 for more information on using this tool.