TOYOTA PREVIA 91-97 REPAIR MANUAL

3-2 ENGINE AND ENGINE OVERHAUL

ENGINE MECHANICAL

ENGINE! MECHANICAL SPECIFICATIONS

Description English Specifications Metric Specifications

Compression pressure

STD

Limit

178psi

128psi

1226kPa

883 kPa

Cylinder head

Head surface warpage

Manifold surface warpage

0.0059 inch

0.0079 inch

0.15mm

0.20mm

Valve seat refacing angle

intake

exhaust

Valve guide

Inner diameter

1991-93 30, 45, 60 degrees

1991-93 15, 45, 60 degrees

1994-97 30, 45, 75 degrees

0.2366-0.2374 inch

30, 45, 60 degrees

15, 45, 60 degrees

30, 45, 75 degrees

6.01 -6.03mm

Outer diameter

STD

0/S 0.5

STD

0/S 0.5

1991-93 0.4344-0.4348 inch

1991-93 0.4363-0.4368 inch

1994-97 0.4331-0.4341 inch

1994-97 0.4350-0.4361 inch

Replacing temperature cylinder head side 194 F

11. 033-1 1.044mm
    11. 083-1 1.094mm


12. 000-1 1.027mm


13. 050-1 1.077mm
    90 C
    Valve
    Overall length
    STD intake

exhaust

limit exhaust

intake

Face angle

Stem diameter intake

exhaust

1991-93 4.0728 inch

1994-97 4.0728 inch

1991-93 4.0787 inch

1994-97 4.0905 inch

1991-93 4.0590 inch

1994-97 , 4. 0709 inch

1991-93 4.0531 inch

1994-97 4.0531 inch

44.5 degrees

0.2350-0.2356 inch

0.2348-0.2354 inch

Stem oil clearance

STD intake

exhaust

limit intake

exhaust

1991-97

1991-97

1994-97

1994-97

Margin thickness

Valve Spring

Free length

Installed tension

STD

minimum

1991-93

1994-97

1991-93

1994-94

Camshaft

Thrust clearance

STD

limit

Journal oil clearance

STD

limit

103.45mm

103.45mm

103.60mm

103.90mm

103.10mm

103.40mm

102.95mm

102.95mm

44.5 degrees

5.970-5.985mm

5.965-5.980mm

0.001 0-0.0024 inch

0.0012-0.0026 inch

0.0031 inch

0.0039 inch

0.020 inch

0.025-0.060mm

0.030-0.065mm

0.08mm

0.10mm

0.50mm

1.6425 inch 41.72mm

63.1 Ibf

42.8 Ibf

56.8 Ibf

38.7 Ibf

280 N

190 N

252 N

172 N

0.001 6-0.0037 inch

0.0047 inch

0.40-0.095mm

0.12mm

0.001 0-0.0024 inch

0.0031 inch

0.025-0.062mm

0.08mm