Compression Test - Test Results
The indicated compression pressures are considered within specification if the lowest reading cylinder is at least 75% of the highest reading. Refer to the Compression Pressure Limit Chart below.
COMPRESSION PRESSURE LIMIT CHART
| Maximum Recorded Cylinder Pressure | Minimum Recorded Cylinder Pressure |
|---|---|
| 924 kPa (134 psi) | 696 kPa (101 psi) |
| 938 kPa (136 psi) | 703 kPa (102 psi) |
| 952 kPa (138 psi) | 717 kPa (104 psi) |
| 965 kPa (140 psi) | 724 kPa (105 psi) |
| 979 kPa (142 psi) | 738 kPa (107 psi) |
| 933 kPa (135 psi) | 745 kPa (108 psi) |
| 1, 007 kPa (146 psi) | 758 kPa (110 psi) |
| 1, 020 kPa (148 psi) | 765 kPa (111 psi) |
| 1, 034 kPa (150 psi) | 779 kPa (113 psi) |
| 1, 048 kPa (152 psi) | 786 kPa (114 psi) |
| 1, 062 kPa (154 psi) | 793 kPa (115 psi) |
| 1, 076 kPa (156 psi) | 807 kPa (117 psi) |
| 1, 089 kPa (158 psi) | 814 kPa (118 psi) |
| 1, 103 kPa (160 psi) | 827 kPa (120 psi) |
| 1, 110 kPa (161 psi) | 834 kPa (121 psi) |
| 1, 131 kPa (164 psi) | 848 kPa (123 psi) |
| 1, 145 kPa (166 psi) | 855 kPa (124 psi) |
| 1, 158 kPa (168 psi) | 869 kPa (126 psi) |
| 1, 172 kPa (170 psi) | 876 kPa (127 psi) |
| 1, 186 kPa (172 psi) | 889 kPa (129 psi) |
| 1, 200 kPa (174 psi) | 903 kPa (131 psi) |
| 1, 214 kPa (176 psi) | 910 kPa (132 psi) |
| 1, 227 kPa (178 psi) | 917 kPa (133 psi) |
| 1, 241 kPa (180 psi) | 931 kPa (135 psi) |
| 1, 255 kPa (182 psi) | 936 kPa (136 psi) |
| 1, 269 kPa (184 psi) | 952 kPa (138 psi) |
| 1, 282 kPa (186 psi) | 965 kPa (140 psi) |
| 1, 296 kPa (188 psi) | 972 kPa (141 psi) |
| 1, 310 kPa (190 psi) | 979 kPa (142 psi) |
| 1, 324 kPa (192 psi) | 993 kPa (144 psi) |
| 1, 338 kPa (194 psi) | 1, 000 kPa (145 psi) |
| 1, 351 kPa (196 psi) | 1, 014 kPa (147 psi) |
| 1, 365 kPa (198 psi) | 1, 020 kPa (148 psi) |
| 1, 379 kPa (200 psi) | 1, 034 kPa (150 psi) |
| 1, 303 kPa (139 psi) | 1, 041 kPa (151 psi) |
| 1, 407 kPa (204 psi) | 1, 055 kPa (153 psi) |
| 1, 420 kPa (206 psi) | 1, 062 kPa (154 psi) |
| 1, 434 kPa (208 psi) | 1, 075 kPa (156 psi) |
| 1, 448 kPa (210 psi) | 1, 083 kPa (157 psi) |
| 1, 462 kPa (212 psi) | 1, 089 kPa (158 psi) |
| 1, 476 kPa (214 psi) | 1, 103 kPa (160 psi) |
| 1, 489 kPa (216 psi) | 1, 117 kPa (162 psi) |
| 1, 503 kPa (218 psi) | 1, 124 kPa (163 psi) |
| 1, 517 kPa (220 psi) | 1, 138 kPa (165 psi) |
| 1, 631 kPa (237 psi) | 1, 145 kPa (166 psi) |
| 1, 544 kPa (224 psi) | 1, 158 kPa (168 psi) |
| 1, 558 kPa (226 psi) | 1, 165 kPa (169 psi) |
| 1, 572 kPa (228 psi) | 1, 179 kPa (171 psi) |
| 1, 586 kPa (230 psi) | 1, 186 kPa (172 psi) |
| 1, 600 kPa (232 psi) | 1, 200 kPa (174 psi) |
| 1, 055 kPa (153 psi) | 1, 207 kPa (175 psi) |
| 1, 627 kPa (236 psi) | 1, 220 kPa (177 psi) |
| 1, 641 kPa (238 psi) | 1, 227 kPa (178 psi) |
| 1, 655 kPa (240 psi) | 1, 241 kPa (180 psi) |
| 1, 669 kPa (242 psi) | 1, 248 kPa (181 psi) |
| 1, 682 kPa (244 psi) | 1, 262 kPa (183 psi) |
| 1, 696 kPa (246 psi) | 1, 269 kPa (184 psi) |
| 1, 710 kPa (248 psi) | 1, 202 kPa (174 psi) |
| 1, 724 kPa (250 psi) | 1, 289 kPa (187 psi) |
| - | - |
If one or more cylinders reads low, squirt approximately one tablespoon of engine oil meeting Ford specification on top of the pistons in the low-reading cylinders. Repeat the compression pressure check on these cylinders.