Piston-To-Cylinder Bore Clearance
WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
- Using a bore gauge, measure cylinder bore for wear, out-of-round and taper at (A), (B) and (C). The X axis is in the longitudinal direction of the engine.Cylinder bore inner diameter
Grade No.
Standard inner diameter
Wear limit
No. 1
95.500 - 95.510 mm (3.7598 - 3.7602 in)
0.20 mm (0.0079 in)
No. 2
95.510 - 95.520 mm (3.7602 - 3.7606 in)
No. 3
95.520 - 95.530 mm (3.7606 - 3.7610 in)
If it exceeds the limit, rebore all cylinders. Replace cylinder block if necessary. Refer to Cylinder Block .
- Check for scratches and seizure. If seizure is found, hone it.
- If both cylinder block and piston are replaced with new ones, select piston of the same grade number punched on cylinder block rear position. These numbers are punched in either Arabic or Roman numerals.
- Measure piston skirt diameter. Refer to Cylinder Block .
- Check that piston-to-bore clearance is within specification. Refer to Cylinder Block .
- The piston-to-bore clearance is measured at the (B) level in the cylinder as shown, above.
- Cylinder bore size is determined by adding piston-to-bore clearance to piston diameter (A).
Rebored size calculation
: D = A + B - C
where,
(D)
: Bored diameter
(A)
: Piston diameter as measured
(B)
: Piston-to-bore clearance
(C)
: Honing allowance 0.02 mm (0.0008 in)
- Install main bearing caps, and tighten to the specified torque. Otherwise, cylinder bores may be distorted after boring.
- Cut cylinder bores.
- When any cylinder needs boring, all other cylinders must also be bored.
- Do not cut too much out of cylinder bore at a time. Cut only 0.05 mm (0.0020 in) or so in diameter at a time.
- Hone cylinders to obtain specified piston-to-bore clearance.
- Measure finished cylinder bore for out-of-round and taper.
- Measurement should be done after cylinder bore cools down.