FAILURE DIAGNOSIS
14-6
3TNV88F Service Manual
Troubleshooting By Measuring Compression Pressure
■
Standard compression pressure (reference value)
■
Engine speed and compression pressure (use for reference)
Figure 14-3
Compression pressure at 250 min
-1
(rpm)
Deviation between cylinders
Standard
Limit
483 - 513 PSI
(3.33 - 3.53 MPa; 34 - 36 kgf/cm²)
384 - 414 PSI
(2.65 - 2.85 MPa; 27 - 29 kgf/cm²)
29 - 43 PSI
(0.2 - 0.3 MPa; 2 - 3 kgf/cm²)
200 250 300 350 400
Engine speed (min
-1
)
569 psi
(40 Kgf/cm
2
)
(4 MPa)
(3 MPa)
(2 MPa)
498 psi
(35 Kgf/cm
2
)
427 psi
(30 Kgf/cm
2
)
284 psi
(20 Kgf/cm
2
)
356 psi
(25 Kgf/cm
2
)
K0000802E01
3TNV88F_SVM_A4.book 6 ページ 2012年7月26日 木曜日 午後6時4分