Continental L-Head Overhaul Manual - Igor Chudov

Page 62 CONTINENTAL L-HEAD ENGINE MANUAL
Figure 140 m Bearing Damage Due to Corrosion
Figure 141 --Scored Bearing Due to Dirt or
Lack of Oil
5. If the visual inspection appears satisfactory,
they should be removed and checked for thickness
using a ball micrometer.
Figure 142 ~ Removing Main Bearing
To remove the upper half of the bearing shell
use a special tool obtainable at most parts houses,
which is a pin with an angular head. It may be inserted
in the oil hole of the crankshaft and as the
crankshaft is turned in a clockwise direction, the
head of this pin picks up the bearing shell and
forces it out of the bore in the block.
Figure 143 ~ Measuring Bearing Thickness
The thickness of the bearing shells is given in
the Limits and Clearance Chart, and if this thickness
has been reduced more than .0005 beyond the
maximum allowable tolerance the bearing shell
must be replaced.
6. If visual inspection of the crankshaft shows
no indication of excessive wear or scoring, the
clearance of the feeler should be checked.
Figure 144- Checking Bearing Clearance with
Plastigauge
7. Check each bearing, one at a time, by using
a piece of Plastigage of a diameter specified to
check certain clearances.
By placing this Plastigage in the bearing and
tightening it in place, the width of the Plastigage
after crushing determines the bearing clearance as
shown above.
CAUTION
When using this method DO NOT TURN
the crankshaft as that would destroy the
Plastigage.