These slick pieces are largely flat semi-circles and ride inside the caps.
Worn bearings will have a polished appearance exposing the layers of
construction. Poorly worn bearings may have grooves or score marks in
them. Unfortunately, this engine had a few shallow score marks.
With the pistons out, the main bearing caps could be unbolted and
removed, then the crankshaft could be carefully lifted out. Each
crankshaft bearing is a two pieces, held in place by the main bearing car
and the U-shaped saddle that the crankshaft rides in (The bearing, of
course, rests between the engine and the crankshaft.) Upon removal, the
bearing is inspected for score marks, even though it will be replaced.
Any score marks offer an indication of the engine’s condition before the
rebuild.
After the fuel pump shaft (which rides on the camshaft and activates
the fuel pump lever) was slid out and the dipstick tube was removed, the
camshaft bearings were ready for removal. To remove the camshaft
bearings, a slide hammer was inserted inside the round openings cast in
the block for the camshaft and bearings to ride in. This area is a circle-
shaped area cast into the block and forming the support for the top and
bottom of the camshaft. To remove each bearing, Herman inserted the
slide hammer through the corresponding camshaft opening in the block.
A lubricated stop was placed on the slide hammer behind the bearing so
Herman could gently ram the bearings out of the engine by using the
momentum of the slide hammer. The stop is matched to the size of the
bearing; any smaller, and it will slide through the opening once occupied
by the crankshaft, but any larger and the stop will hit the block, rather
than the bearing, and not complete the job. Greasing the stop will allow
it to pass through the camshaft opening in the block without scoring the
areas it slides through once the bearing comes out.
singke
(singke)
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