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Scania CV AB 2011, Sweden
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Removing a piston
1 Remove the cylinder head according to the
section Removing the cylinder head.
Industrial and marine engines have a scraper
ring in the liner. See the next page for
removal of the scraper ring.
2 Remove the oil sump.
3 Remove the piston cooling nozzle in the
cylinder block.
IMPORTANT! The piston cooling nozzle must
not be damaged. The oil jet must hit the piston
precisely. If it does not, the piston will become
too warm, resulting in engine breakdown.
Damaged nozzles must not be re-aligned; renew
them instead.
4 Remove the connecting rod cap and
connecting rod bearing shells. Protect the
oilway in the crankshaft e.g. by winding
tape around it with the adhesive side out.
5 Mark the piston before removing; the
connecting rod is marked. The parts must be
refitted in the same place and position. Lift
out the piston and connecting rod.
Note: Always check the connecting rod as
described in Checking the connecting rod, if the
cylinder has seized, been filled with water or
had a broken valve. Bent connecting rods must
not be straightened.
Crank mechanism
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