|
|
Displacement |
243 cubic inches |
Cylinder numbers (front to rear) |
1-2-3-4-5-6 |
Firing order |
1-5-3-6-2-4 |
Spark Plug gap |
0.033 to 0.038 |
Ignition timing |
9 to 11 degrees |
Idle speed (auto) |
600 +/- 70 rpm |
| (manual) |
680 +/- 70 rpm |
Engine oil |
API SE of SF Above 0°F/-18°C - 10W30, Below 60°F/16°C - 5W30 |
Oil capacity |
6 quarts (5.7 liters) |
Automatic Transmission Fluid |
Mercon ATF |
ATF Capacity |
4 quarts |
Displacement |
150 cubic inches |
Cylinder numbers (front to rear) |
1-2-3-4 |
Firing order |
1-3-4-2 |
Spark Plug gap |
0.033 to 0.038 |
Ignition timing |
9 to 11 degrees |
Idle speed (auto) |
600 +/- 70 rpm |
| (manual) |
680 +/- 70 rpm |
Engine oil |
API SE of SF Above 0°F/-18°C - 10W30, Below 60°F/16°C - 5W30 |
Oil capacity |
4 quarts (3.8 liters) |
Automatic Transmission Fluid |
Mercon ATF |
ATF Capacity |
4 quarts |
Displacement |
256 cubic inches |
Cylinder numbers (front to rear) |
1-2-3-4-5-6 |
Firing order |
1-5-3-6-2-4 |
Spark Plug gap |
0.033 to 0.038 |
Ignition timing |
9 to 11 degrees |
Idle speed (auto) |
600 +/- 70 rpm |
| (manual) |
680 +/- 70 rpm |
Engine oil |
API SE of SF |
Oil capacity |
6qts |
Automatic Transmission Fluid |
Mercon ATF |
ATF Capacity |
4qts |
| Engine | Transmission | Initial Timing at Curb Idle (Vacuum Hose Disconnected) |
Curb Idle Speed RPM |
||
Set
To |
Acceptable Range |
Set
To |
Acceptable Range |
||
| 258 1 Barrel carb |
Manual |
3° (49) |
1° 5° |
850 (49) |
750 950 |
10° (Alt) |
8° 12° |
600 (Alt) |
500 700 |
||
8° (Cal) |
6° 10° |
850 (Cal) |
750 950 |
||
Automatic |
8° (49) |
6° 10° |
550 (49) |
450 650 |
|
10° (Alt) |
8° 12° |
550 (Alt) |
450 650 |
||
8° (Cal) |
6° 10° |
550 (Cal) |
450 650 |
||
| 258 2 Barrel carb |
Manual |
6° |
4° 8° |
650 |
550 750 |
Automatic |
6° |
4° 8° |
550 |
450 650 |
|
* Disclaimer: Specifications/descriptions/data provided for informational purposes only. If it's important, make sure you consult with an authorized Jeep mechanic/factory service center. The site operator claims no responsibility for damage or losses incurred as a result of using information posted here.