Alfa Romeo alfa 33 Workshop Manual page 37

Condition
A B N O R M A L C O M B U S T I O N
(backfire, self-ignition,
detonations)
Incorrect ignition
Fuel system out of order
Faulty cylinder heads
EXCESSIVE OIL CONSUMPTION
Oil leaks
Excessive oil consumption
Other
COMPLETE CAR
Probable cause
Incorrect ignition timing
l
Wrong type spark plugs
l
Previously mentioned
Incorrect valve clearance
l
Excessive carbon deposit in
l
combustion chambers
Damaged valve springs (backfire
l
detonations)
Loose oil drain plug
l
Loose oil pan screws
l
Worn or damaged oil pan
l
Worn or damaged cylinder block
l
and cylinder head gaskets and oil
seal rings
Loose oil filter
l
Loose oil pressure switch
l
Dipstick does not fit tightly
l
Worn cylinders and pistons
l
Improperly assembled piston
l
rings
Worn piston rings
l
Worn piston rings and piston
l
ring seats
Worn valve guides and grommets
l
Worn valve sEems
l
Improper oil grade
l
Engine overheats
l
Corrective action
Adjust timing
Replace with recommended type plugs
Previously mentioned
Adjust
carbon deposit
Replace
Tighten it
Tighten or replace
gasket Replace gasket
Replace gaskets and oil seal rings
Tighten or replace, if necessary
Tighten
Replace dipstick
Grind cylinders and replace pistons
Assemble properly
Replace piston rings or, if required,
grind cylinders and replace pistons
Replace pistons and rings
Replace valve guides and grommets
Replace valves
Replace with specified oil type
Previously mentioned
and
remove
May 1983