Jeep TSB #9004171

2018 Jeep Wrangler

TSB Document:

Affected Component: ENGINE AND ENGINE COOLING

Summary
COVER, Cylinder Head, Left/Right Prior to replacing the cylinder head cover on ANY 3.6L Pentastar Upgrade Engine, verify that there are no steel dowel pins pressed into the cylinder head. If dowels are present in the cylinder head please remove carefully without touching/damaging the cylinder head sealing surface.

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Date Published
DEC 04, 2019
NHTSA TSB #
10170306
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