Section 05 ENGINE (4-TEC)
Subsection 08 (ENGINE BLOCK)
PISTON RINGS
Removal
Remove piston ass'y as described above.
Remove rings.
Inspection
Ring/Piston Groove Clearance
Using a feeler gauge measure each ring/piston
groove clearance. If the clearance is too large, the
piston and the piston rings should be replaced.
RING/PISTON GROOVE
CLEARANCE mm (in)
NEW MINIMUM
RECTANGULAR 0.025 (.001)
TAPER-FACE 0.015 (.0006)
OIL SCRAPER RING
0.020 (.0008)
NEW MAXIMUM
RECTANGULAR 0.070 (.0028)
TAPER-FACE
0.060 (.0024)
OIL SCRAPER RING 0.055 (.0021)
SERVICE LIMIT
ALL 0.15 (.006)
2
R1503motr32A
1
1. Piston
2. Filler gauge
294 smr2004-Complete Line Up