DISCLAIMER2000 BMW 328i (E46) Technical Service Bulletin # 110100 Date: 000401
Cylinder Head - Coolant Leak From Right Side
Group 11
Engine
Bulletin Number
11 01 00
Woodcliff Lake, NJ
April 2000
Service Engineering
SUBJECT:
Coolant Leak from Front Right Side of the Cylinder Head
MODEL:
Z3 2.8 and 2.3 with M52TU engines produced from 9/99 - 10/99.
E46 328 and 323 with M52TU engines produced from 9/99 - 10/99E39 528 with M52TU engine produced from 9/99 - 10/99
155
Situation:
Cylinder heads with a machining flaw (hair line crack) may have been installed on M52TU engines in production on a limited number of vehicles.
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 1 as shown
in the illustration.
Correction:
Only if a customer complaint is received and a coolant leak is verified coming from the area shown in the illustration above, should the cylinder head
be replaced.
Procedure:
Replace the cylinder head and replace all valve stem seals as outlined in the appropriate repair manual, repair group 11 sections 11 12 100 and 11 12
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