| Crank Bearing Inserts |
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Crankcases are very vulnerable to damage from the
insertion and removal of bearings. It is not only a common malpractice to
warp the cases when installing/removing bearings, but it is also easy to
damage the bearing bore. Even proper and meticulous removal and installation
of crank bearings will eventually eccentralize the bore. MCE recommends that crank bearing bores be sleeved with brass. Aluminum is a very soft and easily deformed metal. It is poorly suited to the continued process of bearing replacement, and the aerospace industry will not accept bearings pressed into it. Brass sleeves will extend the life of the crankcase and ensure that the crankshaft rotates as freely as possible by keeping the bearings aligned and concentric in their bores.
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If you opt to have bearing inserts in your cases, then you should have the
work performed at the same time as a bottom end rebuild. To do otherwise would
incur other costs of motor disassembly and re-assembly. Pricing:
The above price is based on a previously disassembled engine (ie. during a bottom end rebuild) and includes materials and labor for the sleeving. |