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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 126 (Engine Mechanical (CUMMINS 5.0L) (1 Of 2)) >> Symptom Diagnosis >> Engine Mechanical Symptoms >> Coolant in the Lubricating Oil

Coolant in the Lubricating Oil

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.

Symptom

Possible Cause

Action

Reference

Coolant in the Lubricating Oil

Oil cooler is malfunctioning

Check the oil cooler.

Inspection

Internal coolant leaks

Pressure test the cooling system and look for internal coolant leaks.

System Inspection

Front cover is cracked or porous

Inspect the front cover.

Inspection

Cylinder head gasket is leaking

Check the cylinder head gasket.

System Description 

Cylinder head is cracked or porous

Pressure test the cylinder head.

Compression Check 

Cylinder block is cracked or porous

Inspect the cylinder block.

Inspection