| BMW Engine >> COOLANT LEAK FROM CYLINDER HEAD ON 2.8L M52 ENGINES |
Coolant Leak from Cylinder Head On
1995-2000 BMW 2.8L M52 TU Engines
The AERA Technical Committee offers the following information regarding a coolant leak on 1995-2000 BMW 2.8L M52 TU engines. This leakage has been located at the front right side of the cylinder head corner directly below the BMW insignia cast into the head.
Coolant Leak from Front Right Side of the Cylinder Head
APPLICABLE MODELS AFFECTED:
Z3 2.8L and 2.3 with M52 TU engines produced from 9/99 - 10/99.
E46 328 and 323 with M52 TU engines produced from 9/99 - 10/99E39 528 with M52TU engine produced from 9/99 - 10/99
Apparently some cylinder heads were cast with a machining flaw (hair line crack) and may have been installed on M52 TU engines in production on a limited number of vehicles. The leakage has been observed to be in the area indicated by the black arrow in Figure 1 below. The machining flaw (if present) is located in the front right side of the cylinder head and will cause a coolant leak in the area of cylinder head to block joint.
Figure 1.
Parts required to repair this condition are listed in the table below.
Figure 2.
The AERA Technical Committee
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