Question

A tech is servicing an OHC engine where the cam runs without bearing in its bore. if cam journal-to-bore clearance exceeds spec, the tech must:

-replace bearings with oversized bearings
-replace the cam
-insert bushings
-replace the head

Answer 1

In an OHC engine, if the cam journal-to-bore clearance exceeds specification, the technician must replace the bearings with oversized bearings.

Step-by-step explanation:

In an OHC engine, if the cam runs without bearing in its bore and the cam journal-to-bore clearance exceeds specification, the technician must replace the bearings with oversized bearings. The cam bearings are responsible for reducing friction and supporting the camshaft, ensuring smooth operation. By replacing the standard bearings with oversized ones, the technician can compensate for the increased clearance, ensuring proper functionality of the engine.