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2.5L and 4.0L ENGINE NOT ROTATED 1. Clean the mounting area of the cylinder block and install a new distributor mounting gasket. On some models there is a fork on the distributor housing. The slot in the fork aligns with the distributor hold-down bolt hole in the engine block. The distributor is correctly installed when the rotor is correctly positioned and the slot is aligned with the hold-down bolt hole. On these computer controlled distributors, initial ignition timing is not adjustable. 2. Align the rotor tip with the scribe mark on the distributor housing during removal, then turn the rotor approximately 1/8 turn counterclockwise past the scribe mark. 3. Slide the distributor shaft down into the engine. It may be necessary to move the rotor and shaft slightly to engage the distributor shaft with the oil pump slot. Align the scribe mark on the distributor housing with the mark on the cylinder block. Ensure that the distributor is fully seated against the cylinder block. It may be necessary to slightly rotate (bump) the engine while applying light downward force to fully engage the distributor shaft with the oil pump drive gear shaft. 4. Install the distributor shaft hold-down and bolt. Tighten the bolt to 17 ft. lbs. (23 Nm). 5. Install distributor cap and ignition wires. Insure that the wires are routed correctly before attempting to start engine. ENGINE ROTATED 1. Rotate the engine until the No.1 piston is at TDC compression. 2. Using a flat-bladed screwdriver, in the distributor hole, rotate the oil pump gear so that the slot in the oil pump shaft is in the correct position (see illustration). 3. With the distributor cap removed, install the distributor so that the rotor is positioned correctly (see illustration). Insure that the distributor is fully seated against the cylinder block. If not, remove the distributor and perform the entire procedure again. 4. Tighten the hold-down bolt. 5. Install distributor cap and ignition wires. Insure that the wires are routed correctly before attempting to start engine.

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โˆ™ 2005-09-15 19:15:40
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Q: What is the proper timing degree for a long block 4.0 1993 Jeep Wrangler?
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