3516B Engine for 994F and 994H Wheel Loaders Oil Contains Coolant Caterpillar


Oil Contains Coolant
`
1.1. Probable Causes
2.2. Cooling System
3.2. Engine Oil Cooler
4.2. Cylinder Head Gasket
5.2. Cylinder Head
6.2. Cylinder Liner
7.2. Cylinder Block
8.2. Water Pump
9.1. Recommended Actions
10.2. Leaks in the Cooling System
11.2. Leaks in Core of Oil Cooler
12.2. Leaks in the Cylinder Head Gasket
13.2. Damaged Water Seals
14.2. Cracks in the Cylinder Head
15.2. Cracks in a Cylinder Liner
16.2. Cracks in the Cylinder Block
17.2. Inspect the Water Pump for Blockage

Probable Causes

Cooling System

  • Leaks in the cooling system

Engine Oil Cooler

  • Leaks in the core of oil cooler

Cylinder Head Gasket

  • Leaks in the cylinder head gasket

  • Damaged water seals

Cylinder Head

  • Cracks in the cylinder head

Cylinder Liner

  • Cracks in a cylinder liner

Cylinder Block

  • Cracks in the cylinder block

Water Pump

  • Inspect the water pump for blockage.

Recommended Actions

Leaks in the Cooling System

Pressurize the cooling system. Refer to Systems Operation/Testing and Adjusting, "Cooling System - Test". If the test indicates a drop in pressure and no outside leaks are detected in the cooling system, there may be an internal leak. Make any repairs, as required.

Leaks in Core of Oil Cooler

Check for leaks in the oil cooler core.

Leaks in the Cylinder Head Gasket

Inspect the cylinder head gasket for leaks.

Damaged Water Seals

Inspect the water seal for damage.

Cracks in the Cylinder Head

Check for cracks in the cylinder head. If a crack is found, repair the cylinder head and/or replace the cylinder head.

Cracks in a Cylinder Liner

Check for cracked cylinder liners. Replace any cracked cylinder liners.

Cracks in the Cylinder Block

Inspect the cylinder block for cracks. If a crack is found, repair the cylinder block or replace the cylinder block.

Inspect the Water Pump for Blockage

Check the weep hole in the water pump for blockage. Check the water pump seals for leakage.

Information System:

3516B Engine for 994F and 994H Wheel Loaders Oil Consumption Is Excessive
C9.3 Engines for Caterpillar Built Machines Fuel Filter Base - Remove and Install
D5R Track-Type Tractor Steering Is Unstable
3516B Engine for 994F and 994H Wheel Loaders Exhaust Has Excessive White Smoke
C13, C15, and C18 Tier 4 Final Engines Fuel Injection Lines
2009/05/18 New Software for the AccuGrade Laser CD610 Display Is Now Available {7220, 7620}
966H Wheel Loader and 972H Wheel Loader Machine Systems Hood Tilt Actuator
C9 Engines for Caterpillar Built Machines Flywheel Housing - Remove and Install
C9 Engines for Caterpillar Built Machines Gear Group (Rear) - Remove and Install
980H Wheel Loader Power Train Transmission Planetary - Assemble - Heavy Duty
2009/05/11 New Machine Software is Now Used {7620}
AccuGrade</SUP> GPS / Single UTS / Site and Laser Reference v11 for Excavators Check Sensor Message
D5R Track-Type Tractor Steering Turn Radius Is Large
2009/06/01 Correction to Systems Operation Testing and Adjusting , "Hydraulic Fan System" {1386, 1387, 5050}
2009/05/18 Improved Hardware is Now Available For the Retaining Ring on the Auger Drive for Certain Wheel Tractor-Scrapers {5904}
2009/05/11 New Software for the Engine Electronic Control Module (ECM) is Used {1901, 1902, 1920}
2010/07/02 Introduction of One Piece Piston Cylinder Packs for 3500 High Displacement Engines {1214, 1239, 1331}
C11, C13, C15, and C18 Industrial Engines Coolant Contains Fuel
C13, C15, and C18 Tier 4 Interim Engines Diesel Particulate Filter Temperature Is Low
C9.3 Engines for Caterpillar Built Machines Engine Vibration Is Excessive
C13, C15, and C18 Tier 4 Interim Engines Exhaust Has Black Smoke
2011/06/08 Managing Transmission Events {7610}
Oil Buildup on Remanufactured Cylinder Packs{1225}
2009/06/01 Correction to System Operation Testing and Adjusting , "Hydraulic Fan System" {1386, 1387, 5050}