SEAL 6E6528 - Caterpillar

Probable Causes
Leaks in the cooling system
Leaks in the core of oil cooler
Leaks in the cylinder head gasket
Damaged water seals
Cracks in the cylinder head
Cracks in a cylinder liner
Cracks in the cylinder blockRecommended Actions
Table 1
Troubleshooting Test Steps Value Results
1. Leaks in the Cooling System
A. Pressurize the cooling system. Refer to Systems Operation/Testing and Adjusting, "Cooling System - Test"
Leaks
Result: The test indicates a drop in pressure.
If there are no external leaks, an internal coolant leak can be present. Make the necessary repairs.
Result: The test indicates that there is NOT a drop in pressure.
Proceed to Test Step 2.
2. Leaks in Core of Oil Cooler
A. Check for leaks in the oil cooler core.
Oil cooler
Result: Repair or replace the oil cooler.
Result: The oil cooler is NOT leaking.
Proceed to Test Step 3.
3. Leaks in the Cylinder Head Gasket
A. Inspect the cylinder head gasket for leaks.
Head gasket
Result: The cylinder head gasket is leaking.
Proceed to Test Step 4.
Result: The cylinder head gasket is NOT leaking.
Make the necessary repairs.
4. Damaged Water Seals
A. Inspect the water seal for damage.
Water seals
Result: The water seal is damaged.
Result: The water seal is NOT damaged.
5. Cracks in the Cylinder Head
A. Check the cracks in the cylinder head.
Cylinder head
Result: The cylinder head is cracked.
Make the necessary repairs.
Result: The cylinder head is NOT cracked.
Proceed to Test Step 6.
6. Cracks in the Cylinder Liner
A. Check for cracked cylinder liners.
B. Check the liner seals for damage.
Cylinder liner and seals
Result: The cylinder liner or seal is damaged or cracked.
Repair or replace the damaged cylinder liner and seal.
Result: The cylinder liner or seal is not damaged or cracked.
Proceed to Test Step 6.
6. Cracks in the Cylinder Block
A. Inspect the cylinder block for cracks.
Cylinder block
Result: The cylinder block is cracked.
Repair or replace the damaged cylinder block.