Manual

#4362

INSTRUCTIONS FOR PORTING

AND POLISHING CAST IRON OR

ALUMINUM ENGINE COMPONENTS

ENGINE PORT

POLISHING KIT

CAUTION: CUTTING STONE, ABRASIVE ROLLS OR WHEELS SHOULD NOT BE OPERATED

ABOVE 18,000 RPM. BE SURE TO WEAR EYE PROTECTION WHEN USING ABRASIVE

TOOLS.

1. DISASSEMBLE HEADS AND MAKE SURE ALL SURFACES ARE CLEAN BEFORE STARTING,

APPLY DYE OR INK MARKER TO INTAKE AND EXHAUST SURFACES. FASTEN GASKET IN

PLACE AND SCRIBE INNER EDGE.

2. USE TAPERED CUTTING STONE FOR INITIAL CUT ON PORTS (INTAKE/EXHAUST) AND

TO REMOVE FLASHING. KEEP CUTTING STONE MOVING BACK AND FORTH SO IRREGULAR

SURFACES ARE NOT CREATED. DO NOT GRIND OUTSIDE OF SCRIBED LINES.

3. AFTER USING TAPERED CUTTING STONE ON PORTS, USE ABRASIVE ROLLS WITH

DIFFERENT LENGTH MANDRELS TO EXTEND INSIDE PORTS TO BLEND AND POLISH. USE

LARGER ROLLS ON INTAKE PORTS, SMALLER ROLLS ON EXHAUST PORTS.

IMPORTANT: WHEN MOUNTING GRINDING/POLISHING CARTRIDGE ROLLS, TAPERED MAN-

DREL MUST BE INSERTED INTO GLUED END OF ROLL TO PREVENT UNWINDING. THREAD

MANDREL INTO ROLL AND TURN UNTIL TIGHT.

4. FOR FINAL BLENDING AND POLISHING, USE THE 1” FLEX FLAP WHEEL AND THE

BUTTERFLY FLAPPER. (CUT A 1” X 4” STRIP OF ABRASIVE CLOTH, FOLD IN HALF AND

INSERT INTO SPLIT END OF SLOTTED MANDREL).

5. CLEAN ALL INTAKE AND EXHAUST VALVES, THEN INSERT VALVES IN HEAD TO PROTECT

VALVE SEATS. USE TAPERED CUTTING STONE, ABRASIVE ROLLS AND FLAP WHEEL TO

“CLEAN UP” COMBUSTION CHAMBERS. BLEND IN ALL SHARP EDGES. BE CAREFUL, DO

NOT REMOVE TOO MUCH METAL IN THE COMBUSTION CHAMBER, THIS WILL REDUCE

COMPRESSION. DO NOT GRIND SPARK PLUG HOLE THREADS AND AREA AROUND

VALVE SEATS.

6. FROM COMBUSTION CHAMBER SIDE, BLEND AREA BELOW VALVE SEAT DOWN INSIDE

VALVE POCKET. STAY 1/8” AWAY FROM VALVE SEAT TO AVOID NICKING OR GOUGING OF

SEAT.

CONTENTS OF KIT: QTY

TAPERED CUTTING STONE 1

GRINDING/POLISHING ROLLS-ASSORTED SIZES AND GRITS 28

1”FLEX FLAP WHEEL 1

MANDRELS-SLOTTED AND TAPERED STYLE-LONG/SHORT 3

ABRASIVE ROLL 1” X 5’ 1

THE MR. GASKET PERFORMANCE GROUP • 10601 MEMPHIS AVE. • CLEVELAND, OHIO 44144 • WWW.MRGASKET.COM