Home » International DT466 » International DT466 – ENGINE SYMPTOMS DIAGNOSTICS – Lube Oil in Coolant

International DT466 – ENGINE SYMPTOMS DIAGNOSTICS – Lube Oil in Coolant

Symptom
Coolant contaminated with lube oil will have oil in the deaeration tank.

Cause
• Oil cooler

Tools
• Oil cooler pressure test plate
• Air pressure regulator

Procedure

1. Verify if coolant is contaminated by inspecting deaeration tank for presence of oil.
2. Place a coolant drain pan under the oil system module.

3. Remove the coolant drain plug located at the bottom of the oil system module. Drain coolant
NOTE: Replace O-ring with a new O-ring when installing the coolant drain plug.

4. Remove the eight bolts (M8 x 20) securing the oil cooler to the oil cooler housing. Separate the oil cooler from the      oil cooler housing.

5. Pressure test the oil cooler following the procedure in the Engine Service Manual. If a leak is noticed, replace the        oil cooler.