Tomei Powered EJ26KIT/FORGED CRANKSHAFT - Manual (Page 8)

2. DEBURRING CASTING ERRORS & RADIUS FINISH
Chamfer and radius the edges and galleries to remove all casting flashes/errors. You can also use #400 grit
sandpaper for certain areas like the bottom of the piston skirts and on sharp edges.
3. PISTON RING ADJUSTMENTS & PREPARATIONS
Please adjust, and measure the following when you use our piston kit.
① Insert the Piston Ring & position it in the middle of the
cylinder bore by using the head of the Piston, or a ring
squaring tool. Then check the ring gap clearances with
a thickness gauge.
② If the Ring Gap is too narrow and not within the required
clearance values, you'll have to file the edges of the
Piston Rings to enlarge the gap, until the gap is within
the required specifications.
CAUTION
Adjust the Ring Gap to meet the specified clearance. If the Ring Gap Clearance is not
within the specified ring gap clearance values, can cause possible damages & engine failure.
Clearance (mm)
Second Ring 0.18~0.35
Oil Ring 0.15∼0.70
Top Ring 0.18~0.35
Clearances R 0.3
Approx
50mm
Thickness Gauge
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within the specified ring gap clearance values, can cause possible damages & engine failure.
4. PARTS ASSEMBLY.
Follow the assembly instructions as specified on the Fuji Heavy Industries workshop service manual.
When using the Tomei Conrods, refer to the instructions on the Tomei "H-Beam connecting rod manual".
(1) PISTON MARK POSITIONING
Pay attention to the position of the Piston Marking prior to assembly.
CAUTION
If the Pistons are installed
facing the wrong way, the
performance will not be the
same and you'll risk possible
damage to the pistons and
the engine.
[TOMEI EJ25/26 Piston notes]
Piston mark facing the front side.
RH side LH side
Piston mark facing the rear side.
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