Engine - Piston Slapping After Cold Start

91mazda03

Bulletin No. 009/91
Issued 8/5/91
Revised


Category B


Applicable Model/s (see below)


Subject

COLD ENGINE PISTON SLAPPING


DESCRIPTION

Some 1988-'91 929 and 1989-'91 MPV models with JE SOHC engine may experience piston slapping after cold engine start. Replacement pistons are available to correct this problem.

REPAIR PROCEDURE

Replace all pistons according to Workshop Manual procedures, Section "1" or "B."

NOTE:

^ Refer to the Workshop Manual to check cylinder bore taper out-of-round and piston-to-cylinder clearance specifications.

^ Different type pistons may be required for each cylinder. Types available are "Type A," "Type C," and "Type O." To identify the type required, refer to the stamping on the bottom, left, rear portion of the block.





Example:

According to the stamp on the engine block in the example provided below, this engine requires the following pistons:

"Type A" piston in the No. 5 cylinder
"Type C" piston in the No. 2 cylinder
"Type O" piston in the No. 1, 3, 4, & 6 cylinders


NOTE:

The stamp maybe difficult to see due to corrosion. Sand and/or wire brush the stamped area for visual inspection.





PARTS INFORMATION


NOTE:

^ Replacement pistons are stamped "A", "O" or "C" on the top.
^ Only wristpins are provided with replacement pistons. Rings or other components must be ordered separately.
^ Piston Pin Setting Tool Set (SST 49 L011 0A0) is necessary for wristpin removal and installation.


WARRANTY INFORMATION

Warranty Type Code: A
Customer Comment Code: 11
Damage Code: 9C
Part No. of Main Cause: JEY6 11 SAX, JEY6 11 SAY or JEY6 11 SAZ
Operation No./Labor Hour: B0507XRX / 10.8 - 929
B0507BRX / 10.7 - MPV 2WD
B0507CRX / 11.0 - MPV 4WD
B0507BRA / 0.1 - add for MPV 2WD with A/C
B0507CRA / 0.1 - add for MPV 4WD with A/C