Piston, Piston Ring, Piston Pin Construction [Lf] - Mazda 2006 MX-5 Service Highlights

PISTON, PISTON RING, PISTON PIN CONSTRUCTION [LF]

• The pistons are made of aluminium alloy, which withstands heat and is highly conductive.
• The piston skirt is coated with graphite to reduce friction.
• The offset pistons are used to reduce piston-slapping noise.
• To prevent the piston from being reassembled in the wrong direction, the front mark (←) is on the piston.
• Pistons and connecting rods cannot be disassembled because they are shrinkage fit.
Piston Specification.
Outer diameter
Offset quantity
Compression height: A
Piston height: B
• The following piston rings have been adopted:
Barrel face ring for top ring, taper under cut ring
for second ring, two scuff rings and an expander
for oil ring.
• The piston pin is made of chrome steel alloy,
which has superior rigidity.
• The connecting rod and the piston pin are
shrinkage fit, so that it cannot be disassembled.
End Of Sie
01–10–6
MECHANICAL
item
mm {in}
mm {in}
mm {in}
mm {in}
TOP RING SECTIONAL VIEW
SECOND RING SECTIONAL VIEW
EXPANDER
Specification
87.465—87.495 {3.4435—3.4435}
28.5 {1.122}
51.0 {2.0078}
A
B
ENGINE
FRONT
SIDE
PISTON UPPER VIEW
OIL RING SECTIONAL VIEW
SIDE RAIL
E5U011011010N01
0.8 {0.04}
PISTON SIDE VIEW
OFFSET
OUTER DIAMETER
INSTALL ARROW
FACING ENGINE
FRONT
VALVE RISES
E5U110ZT5043
E5U110ZT5013