REMOVAL & INSTALLATION
151 Four and 250 Inline Six Cylinder Engines
The camshaft in these engines is gear-driven, unlike the chain-driven cams in V6s and V8s. The removal of the timing gear requires removal of the camshaft.
- After the cam is removed, place the camshaft and gear in an arbor press and remove the gear from the cam. Many well-equipped machine shops have this piece of equipment if you need the gear pressed off.
- Installation is in the reverse order of removal. The clearance between the camshaft and the thrust plate should be 0.001-0.005 in. on both engines. If less than 0.0015 in. clearance exists, the spacer ring should be replaced. If more than 0.005 in. clearance, the thrust plate should be replaced.