Fitting Pistons

Measure cylinder bore at 3 places for out-of-round and taper. If either out-of-round or taper exceeds .002" (.05 mm), rebore cylinder for oversize pistons. See CYLINDER BORE SIZES .

NOTE: Top of 1.8L cylinder block is marked with four letters (either A or B). When read from left-to-right, they indicate cylinder bore size for cylinders No. 1 through 4.

CYLINDER BORE SIZES

Application

New Diameter In. (mm)

1.3L

Standard

⁽¹⁾ 2.834-2.835 (72.00-72.02)

Oversize

2.844-2.845 (72.25-72.27)

1.5L

Standard

⁽²⁾ 2.913-2.914 (74.00-74.02)

Oversize

2.923-2.924 (74.25-74.27)

1.75L

Standard

⁽³⁾ 13.031-3.032 (77.00-77.02)

Oversize

3.041-3.042 (77.25-77.27)

1.8L ⁽⁴⁾

"A" Standard

⁽⁵⁾ 3.1500-3.1504 (80.01-80.02)

"A" .25 O/S

3.1585-3.1594 (80.225-80.248)

"A" .50 O/S

3.1683-3.1692 (80.475-80.498)

"B" Standard

⁽⁶⁾ 3.1496-3.1500 (80.00-80.01)

"B" .25 O/S

3.1581-3.1590 (80.215-80.238)

"B" .50 O/S

3.1679-3.1688 (80.465-80.488)

⁽¹⁾	Service limit is 2.839" (72.10 mm).

⁽²⁾	Service limit is 2.917" (74.10 mm).

⁽³⁾	Service limit is 3.043" (77.30 mm).

⁽⁴⁾	"A" or "B" designation is located on top surface of cylinder block.

⁽⁵⁾	Service limit is 3.1516" (80.05 mm).

⁽⁶⁾	Service limit is 3.1512" (80.04 mm).

Determine piston-to-cylinder bore clearance. If not within specifications, rebore cylinder and install oversize pistons.

PISTON SIZES AVAILABLE

Application

New Diameter In. (mm)

1.3L ⁽¹⁾

Standard

2.833-2.835 (71.97-72.00)

Oversize

2.843-2.844 (72.22-72.25)

1.5L ⁽¹⁾

Standard

2.912-2.913 (73.96-73.99)

Oversize

2.922-2.933 (74.21-74.24)

1.75L ⁽¹⁾

Standard

3.0299-3.0307 (76.96-76.99)

Oversize

3.0398-3.0405 (77.21-77.23)

1.8L ⁽¹⁾

"A" Standard

⁽²⁾ 3.1486-2.1495 (79.975-79-998)

"B" Standard

⁽³⁾ 3.1482-3.1491 (79.965-79.988)

0.25 Oversize

3.1583-3.1594 (80.220-80.248)

0.50 Oversize

3.1679-3.1692 (80.465-80.498)

⁽¹⁾	Measured at bottom of skirt.

⁽²⁾	Service limit is 3.1482" (79.965 mm).

⁽³⁾	Service limit is 3.1478" (79.955 mm)