• Recommended parts for the Jeep 4.0/230HP engine
• Recommended parts for the Jeep 4.6/260HP engine
• Jeep 4.2 to 4.6 liter conversion
• How to clearance the Jeep oil pan for a HV pump
• How to prime Jeep oil pump
• How to make crank positioning sensor adjustable
• Installing the distributor in the in the Jeep 4.0

We build each engine to be a direct bolt in for your year Jeep, this makes installation very simple to say the least. You will need to follow the recommended parts list below for these engines so your engine will fit in your Jeep and produce the rated horsepower. We will give your full tech support on our engines so if you have a question with your install please feel free to call.

Recommended parts for the Jeep 4.0/230HP long block

- Stock fuel injectors

- 91 octane pump fuel

- 62mm throttle body

- Aftermarket header and exhaust

- Cold air intake

- DUI Firepower Ignition Kit which includes cap, rotor, Screamin Demon coil, Livewire spark plug wires (use your stock distributor.

- Champion RC9YC4 with gap set to .035"

- Valvoline 10/40 oil for break in (3000 miles)

- Wix or AC oil filter for a 4.0 Jeep (Do not use a Fram oil filter we have seen problems with them collapsing.

Recommended parts for the Jeep 4.6/260HP long block

- 24lb fuel injectors

- 91 octane pump fuel

- 62mm throttle body

- Aftermarket header and exhaust

- Cold air intake

- DUI Firepower Ignition Kit which includes cap, rotor, Screamin Demon coil, Livewire spark plug wires (use your stock distributor.

- Adjustable crank positioning sensor (Standard transmission only, see tech article).

- Champion RC9YC4 with gap set to .035".

- Valvoline 10/40 oil for break in (3000 miles)

- Wix or AC oil filter for a 4.0 Jeep (Do not use a Fram oil filter we have seen problems with them collapsing.

- Pilot bushing for a 4.2 Jeep (For standard transmission applications only)

Jeep 4.2 to 4.6 liter conversion

- If you have a 4.2 engine in your Jeep and you would like to run out 4.6/260HP long block here is what you will need to do.

You will need to use the following part from your 4.2 for the new 4.6 engine:
- Motor mounts
- Oil pan and timing cover (we use a HV oil pump and this might require that you clearance the oil pan slightly where the oil pump sits, see tech article)
- Flywheel
- Brackets and pulleys
- Harmonic balancer

You will need to buy the following parts for a 1995 model year 4.0 Jeep engine in order to fit the new 4.6 into your Jeep:

- 4.0 header (you can call Benny at Hesco Performance (205) 251-1472 for the proper header to run this engine in your Jeep)

- 4.0 Valve cover (you can find this at almost any junk yard for short money)

If you are using your stock 4.2 or aftermarket carb style intake you will need to make a modification to it in order for it to fit onto the 4.0 head.  You will need to take a small round file or a dremel and cut a half moon into the intake directly below the first and last bolt holes in the intake (the holes that will bolt the intake to the head). This will allow you to jack the intake up onto the half moon that you cut and line the port of your 4.2 intake with the port on the 4.0 head.

Keep in mind that the line up of the ports will not be exact in all cases but this does work without a problem. You will have to use the stock bolts and clamping hardware and in some cases need to fab small clamps to properly secure the intake.

If you are buying the Mopar Multi Port Fuel injection kit for your new 4.6 engine this mod has already been done by the factory.

If you are running a carb intake with this engine we do recommend a Offenhauser aftermarket intake and a Holley 450 cfm carb or equivlent.

How to clearance the Jeep oil pan for a HV pump

In most cases you will need to slightly clearance your stock oil pan to fit the taller HV oil pump that is provided with your new Golen Jeep engine. To do this you will want to mark out the area where the oil pump hits the oil pan and take a flat hammer and carefully bang the pan out in that area. Make sure that you have the oil pan gasket in place when checking for the proper clearance. If you have a torch it will help to heat up the oil pan before trying to clearance it.

How to prime the Jeep oil pump

You will need to make a drive rod out of an old flat head screwdriver by cutting off the handle so you can mount it in a 1/2" electric drill. You will run the oil pump through the hole in the block that the distributor goes in. You will want to have your oil pressure gauge functioning at this point so you will know you are building oil pressure, it will take a few minutes to bring the engine to full prime.

Once you have finished priming the oil pump follow the instructions below on how to properly install the Jeep distributor.  Feel free to call our tech line with any questions on either of these procedures.

How to make crank positioning sensor adjustable

If you have a Jeep with a standard transmission you can remove your crank position sensor (located on the bellhousing of the transmission) and take a small round file and elongate the holes to make it adjustable. You will want to go about 1.4" on either side of the stock holes in the sensor. This will give you about a 2-4 degree adjustment in timing.

Installing the distributor into a Jeep 4.0 engine

1. Ensure the #1 piston is at TDC on a compression stroke.
    
2. Look at the pulse ring on the distributor, note that there are two holes
    
3. Insert a 3/16" pin (an allen wrench will do) into the hole at the end of
   the pulse ring, the alignment pin needs to engage the hole in the distributor.
   
   Note: the hole that is "free" is to time the four cylinder engine, do not use for the six cylinder.
    
4. Preposition the oil pump to accept the distributor drive.
    
5. Inset the distributor, engaging the oil pump. 
   
   Note: The Rotor will NOT be aligned to the number 1 plug wire on the cap.
    
6. Remove alignment pin.
    
7. Install and tighten the securing bolt at the base of the distributor.
   
   Thanks to GES customer Dave Kaufman for this tip.
    

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