Sunbeam ALPINE I SERIES: APLINE II SERIES, Workshop Manual

Page: 79 / 413

WSM.124
Section B (Engine)
thus allowing the liner to correct any misalignment,
FEELER GAUGE STRAIGHT EDGE
Fig. 47.
Checking
front
main bearing
cap alignment
with
straight edge and
·0015' fee/er
Press the liner home flush with the top of the
cylinder block.
When each of the liners has been treated as above,
the liners may be finish bored and honed to suit
the new pistons, allowing for piston clearance as
previously described.
Cylinder liners may be rebored only up to ·040'
(1 ·02 mm.) oversize.
To renew
The method used to remove liners will depend to
a great extent on the facilities available. Liners
2nd
re-issue
Page 41
may be drawn or pressed out from the bottom only.
Check the cylinder for concentricity and correct
size for the full length. If the diameter is in excess of
the dimension given on the previous page, the
correct interference fit will not be obtained.
Provided the conditions set out above are correct,
press in the new liners. finally, bore and hone the
liners to suit the standard pistons.
CRANKSHAFT
Identification
For purposes of Identification the letters and figures
E.N.16 are embossed on both crank webs connecting
No. 1 and No. 2 crankpins, and No. 3 and No. 4
crankpins, see Fig. 48. Crankshafts without this
identification must not be used for replacements.
Main Bearings
The main bearing shells for these engines are white.
metal lined and are interchangeable.
Main bearing shells are available in standard size and
undersizes as detailed in the General Data Section
under "Crankshaft".
If required the main bearing shells can be removed
for inspection, or renewed, provided the crankshaft
main bearing journals are not worn or scored,
without removing the crankshaft from the engine.
When carrying out this operation the following
procedure should be followed:
Drain engine oil.
Remove sump and oil pump.
Slacken all main bearing fixing bolts one to two
turns. Starting at one end of the crankshaft remove
the bottom main bearing cap, and the corresponding
top half bearing by pushing It around the crankshaft
journal, with a piece of thin metal from the opposite
side to Its locating lip. Replace the bottom bearing
and cap to support the crankshaft before proceeding
to remove the next main bearing cap.