Fitting Piston Pins; Refinishing Cylinder Walls - Lincoln Continental 1964 Shop Manual

8-12 GROUP 8-ENGINE
PISTON CLEARANCE
RIBBON
RIBBON
0.001_5 THICK
0.002 THICK
& 0.500 WIDE & 0.500 WIDE
Ribbon Clear- Ribbon
Clear-
Pull
ance
Pull ance
Lbs. Inches Lbs.
Inches
13
-
13
-
12
·- 12
-
11
-
11
-
10
-
10
-
9 -
9 0.0002
8
-
8 0.0005
7 0.0002
7
0.0007
6
0.0004 6 0.0010
5 0.0007 5
0.0012
4 0.0009
4
0.0015
3 0.0012 3 0.0017
2 0.0015
2 0.0020
1 0.0017 1 0.0022
0 0.0020
0
0.0025
FIG.
9-Piston Clearance Chart
5. Measure the gap between the
ends of the ring with a feeler gauge
(Fig. 11). If the ring gap is less than
the recommended lower limit, try
another ring or set.
6. Check the ring side clearance
of the compression rings with a feeler
gauge inserted between the ring and
its lower land (Fig. 12). The gauge
should slide freely around the entire
ring circumference without binding.
Any wear that occurs will form a step
at the inner portion of the lower land.
If the lower lands have high steps
the piston should be replaced. '
;t-,.,.,·~---
FIG.
10-Checking
Piston pearance
RIBBON
RIBBON
0.0035 THICK
0.006 THICK
& 0.500 WIDE
& 0.500 WIDE
Ribbon Clear- Ribbon Clear-
Pull
ance
Pull
ance.
Lbs. Inches Lbs. ,Inches
13
0.0012 13
0.9038
12 0.0014
12 0.0040
11 0.0016
11 0.0041
10 0.0018 10 0,0043
'9
0.0021 9 0.0045
8 0.0023
8
0.0041
7
0.0025'
7 ~.0049
6 0.0027
6 0.0050
5 0.0030 5 0.0057
4
0.0032 4 0.0059/
3 0.0033
3 0.0060
~
0.0036 2 0.0062
1
0.0038 1 0.0063
0 0.0040
0
'0.0065
A1930·A
FITTING PISTON PINS
The piston pin to piston fit must
be checked during assembly of the
piston to the connecting rod.
CYLINDER BLOCK
REFINISHING
CYLINDER WALLS
Honing is recommended for refin-
ishing cylinder walls only when the
walls have minor imperfections, such
as light scuffs, scratches, etc. The
grade of hone to be used is deter-
mined by the amount of metal to be
removed. Follow the instructions of
the hone manufacturer. If coarse
stones are used to start the honing
operation, leave enough material so
that all hone marks can be removed
with the finishing hone which is used
to obtain the proper piston clearance.
Cylinder walls that are severely
marred and/ or worn beyond the
specified limits should be refinished.
Before any cylinder is refinished all
main bearing caps must be in piace
and tightened to the proper torque
so that the crankshaft bearing bores
will
not become distorted from the
refinishing operation.
. Refinish only the cylinder or cyl-
mders that require it. All pistons
are the same weight, both stand-
ard and oversize; therefore, var-
ious sizes of pistons can be used
PISTON RING
FIG.
11-Piston Ring
Gap
(132)
A1928-A
without upsetting engine balance.
Refinish the cylinder with the
most wear first to determine the
maximum oversize. If the cylinder
will not clean up when refinished
for the maximum oversize piston rec-
ommended, replace the block.
Refinish the cylinder to within ap-
proximately 0.0015 inch of the re-
quired oversize diameter. This will
allow enough stock for the final step
of honing so that the correct surface
finish and pattern are obtained. Use
clean sharp hones of No. 220-280
grit for this operation.
For the proper use of the re-
finishing equipment, follow the in-
structions of the manufacturer. Only
experienced personnel should be al-
lowed to perform this work.
After the final operation in either
of the two refinishing methods de-
scribed and prior to checking the
piston fit, thoroughly wash the cyl-
inder walls with solvent to remove
all abrasive particles, then thoroughly
dry the walls. Check the piston fit ..
Mark the pistons to correspond to
Feeler Gauge
FIG.
12-Ring Side
Clearance