C-15, C-16, and C-18 Engines Caterpillar

Compression - Test

Usage:

C-15 6NZ

Cylinder compression may be affected by many reasons. Some of the possibilities are listed below.

Restriction in the inlet system or the exhaust system
Inlet valves and exhaust valves that are not properly adjusted
Leaky head gasket
Slow cranking speed
Damaged piston or rings

These Caterpillar engines use Keystone piston rings. Keystone piston rings are designed to expand during the compression stroke of the engine. At engine cranking speed, the Keystone piston rings do not fully seal. This results in unstable readings for cylinder compression. As a result Caterpillar does not recommend performing compression tests on engines that use Keystone piston rings.

Caterpillar Information System:

C-15 On-Highway Engine Troubleshooting

C-15 On-Highway Engine Turbocharger - Inspect

C-15 On-Highway Engine Air Inlet and Exhaust System - Inspect

C-15, C-16, and C-18 Engines Fuel System Pressure - Test

C-15, C-16, and C-18 Engines Finding Top Center Position for No. 1 Piston

C-15 On-Highway Engine Electronic Control System Components

C-15 On-Highway Engine Basic Engine

C-15 On-Highway Engine Air Inlet and Exhaust System

C0.5, C0.7, C1.1/3011C, C1.5/3013C, C1.6 and C2.2/3024C/3024CT Industrial Engines and Engines for Caterpillar Built Machines Connecting Rod - Inspect

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C-10, C-12 and C-15 On-highway Engines 0110-00 High Coolant Temperature Warning (61)

C-10, C-12 and C-15 On-highway Engines 0110-11 Very High Coolant Temperature (61)

C-15, C-16, and C-18 Engines Cooling System - Check - Overheating

3406E and C15 Marine Engines Circuit Breakers

3408E and 3412E Industrial Engines Turbocharger

C-10, C-12 and C-15 On-highway Engines 0100-01 Low Oil Pressure Warning (46)

C-10, C-12 and C-15 On-highway Engines 0100-11 Very Low Oil Pressure (46)

C-15 On-Highway Engine Piston Ring Groove - Inspect

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C-10, C-12 and C-15 On-highway Engines Engine Wiring Harness Diagram

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C9 On-highway Engine Cylinder Head

G3520B Engines Cat Data Link