Tools needed: 13mm or 1/2″ Wrench 13mm or 1/2″ Socket Ratchet RTV Gasket Thermostat Wire Brush 1: Pull your temp sensor and let some coolant drain, squeeze the top radiator hose to force some more out. 2: Remove the bolts holding the thermostat housing in. You should be able to get the bottom bolt out [...]
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Tools needed: 13mm or 1/2″ wrench Screwdriver Hammer Piece of pipe (optional, but may be needed) 1: Remove your shroud. You will have two bolts at the top to remove and it should lift right out. 2: Start removing the 4 nuts that hold the fan and clutch onto the pulley. Mine were hard to [...]
Tools needed: BFH Dremel or Sawzall Lots of cheap screwdrivers (48c at Home Depot) and other prying utensils Lots of “heavy duty” cutting wheels if you use a dremel Time 1: Disconnect your door check arm, it should be held in with a roll pin. 2: Get your dremel or sawzall and cut the bottom [...]
Needed: Two 3a diodes, 1N5402 Philips Screwdriver 14ga wire, THNN or standard rubber insulation. Red, it is carrying 12v+ Heavy duty switch Fuse holder, 10a fuse. Inline style for glass fuse is the smallest/least bulky. Misc wire connectors, male spade, etc. Soldering iron/solder if you have it (highly recommended) Electrical tape or Heatshrink This switch [...]
97+ Jeep Cherokee (4.0L) High Idle Switch
Posted: March 10, 2011 in Technical WriteupsTags: 2wd, 4.0, 4wd, 4x4, Cherokee, ECU, Engine, Extended Idle, Gasoline, High Idle, Jeep, Liter, Litre, Switch, Wire
Have OBA, A winch, or would just like a higher idle for other purposes? Here is the mod for you. The “Extended Idle” switch was an option on the police issue Cherokees. It is said to be there to kick up alternator output for high demand things such as lights and AC, and to keep [...]
Renix Era Dana 30 Vacuum Disconnect Mod
Posted: March 8, 2011 in Technical WriteupsTags: 2wd, 30, 4.0, 4wd, 4x4, Cherokee, D30, Dana, Engine, Gasoline, Jeep, Liter, Litre, Posi-Lok, Renix, Solenoid, Throttle Body, Vacuum, Vacuum Disconnect
I got tired of not having reliable 4wd in my old jeep, so I decided to do this mod. It worked well for the time I had it, and I never noticed a difference in ride or MPG. It is very easy to do and it takes an hour or less if you know what [...]
Jeep 4.0L Valve Cover Gasket Replacement and Cleaning
Posted: March 8, 2011 in Technical WriteupsTags: 2wd, 30, 4.0, 4×4, 4wd, CCV, Cherokee, Chrysler, Cleaning, Engine, Gasket, Gasoline, Jeep, Liter, Litre, Renix, RTV, Valve, Valve cover
1: Gather your tools: You will need an 11m Socket/Wrench, Ratchet, and your VC Gasket. You may need a screwdriver and small hammer. Optional: Paint, Masking Tape, Newspaper, 1/4″ socket. 2: Begin removing your Valve Cover bolts, there are about 20 along the perimeter. The rear bolt is a PITA and will be the hardest [...]
Removal and Cleaning of 4.0l IAC
Posted: March 8, 2011 in Technical WriteupsTags: 2wd, 30, 4.0, 4×4, 4wd, Cherokee, Cleaning, Engine, Gasoline, IAC, Idle Air Control, Jeep, Liter, Litre
A gunked up IAC is a common problem on the Jeep 4.0l and can cause many problems such as high idle or no idle. Tools: T-15 Torx, Brake cleaner, Q-tips, Rag/Paper towels. First, locate your IAC. It is located on the TB to the left of the tps, and has a right-angle plug on it. [...]
