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ENGINE PORT
POLISHING KIT
#4362
INSTRUCTIONS FOR PORTING
AND POLISHING CAST IRON OR
ALUMINUM ENGINE COMPONENTS
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 MANDREL 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
Printed un U.S.A. ©2005 Made in Taiwan ROC INST 97140900
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