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The new clutch looks nice. Did you change the throw-out bearing and/or clutch slave cylinder? I once had a throw-out bearing go bad and it squealed whenever the clutch pedal was depressed.

My YJ is the 1990 version, converted to fuel injection (got rid of the carburetor) and I have observed something that I ask others to comment on. Whenever I open the gas cap to refuel, I experience tank pressure relief as the cap loosens... the tank is pressurized as I drive. The lower the...

I have an AX15 and had similar synchronizer issues when hot. Two things... 1.) Chrysler-Jeep came out with a service bulletin that recommends replacing the transmission 75W90 gearbox oil with 30 weight engine oil. Interestingly, my rebuilt TRANSFER gearbox has a warranty based upon using 30...

I love the "back and forth" on this, and of course, everyone will make their own decision. All I can say with absolute assurance concerning the rear track bar... when mine broke, the drive train was affected along with audible thumping during acceleration and braking. After repair, everything...

Follow-up to the oil filter issue. I have had engine changes which affected the filter threads. The male threaded adapter on the engine block is removable. We had to make sure that old adapter was transferred to the new block before sending the old core back in. These threaded adapters are...

Carburetor... if it ain't broke, don't fix it. 600 CFM is the capability, but the engine won't draw more airflow than it needs. As for piston ring wash, well, for that to happen the fuel system would have to be operating amazingly rich. It's possible... I've seen engines running so rich that...

My 1990 4.2L YJ has this factory sticker mounted under the hood in front of the radiator (see photo) - the M20x1.5 is the correct oil filter.

If you're happy, then no problem, but I think surface temps lag internal temps I would troubleshoot a little more. What is the condition of the coolant temp sensor? You can test it with an Ohm-Meter, but I like to immerse it in a cup of boiling water to verify the sensor and the gauge. How...

I looked at the link you sent and it made me feel good about the world again. President Trump was just acquitted AND there are Electronic Fuel Injection kits still available for the Jeep YJ 4.2! The kit you are looking at is a Throttle Body Injection (TBI) vs my Multi-Port conversion. There...

I had my 1990 4.2 with a two-barrel carburetor converted, and it went extremely well. At the time, Mopar sold a kit to make this change but it is no longer available. It was worth it regardless of cost as the 1990 4.2 vacuum and emissions systems were extremely complicated and unreliable with...

My books call for a 12 inch blade, but I can't find them in the local area. I need to order online.

To be honest, my experience with my 1990 4.2 BBD carburetor system drove me to convert it to fuel injection. The vacuum system is extremely complex, and over the years, many of the components (check valves, vacuum motors, sensors) are no longer available new. A couple of thoughts: The choke...

I'm not exactly sure what I'm looking at, but my first impression is that you need to mow your under-floor lawn. Reminds me of a couple of events that happened to me and to a friend of mine. In my case, after a high water encounter, a bunch of twigs and desert scrub were caught on top of the...

Thanks for the heads up... I just placed my order. I really appreciate this type of "tip" when unique parts like this are located.

I have a different view of track bars and have had the SAME experience that you described... the rear axle mount point cracked thus releasing the track bar. In my case, I had the mount welded and re-enforced and had the track bar reconnected. Like you, I want to keep the Jeep as structurally...

My 4.2L 5-Speed Manual (converted to 1994 4.0L fuel control system with fuel injection) failed as a gross polluter in California. Had a new Catalytic Converter welded in and it passed with flying colors. I assume your "Check Engine" light was NOT on and no malfunction codes exist in the...

Some ideas: Run a carbon-cleaning solvent through your engine. Operate at higher RPM's for awhile. Regardless of its fuel source, a gasoline engine simply cannot diesel without something to ignite the fuel, such as combustion chamber carbon deposits. Check for correct spark plugs. Replace the...

4.2 engine? From the electrical manual, Ignition section: ENGINE CONTINUES TO RUN WITH KEY OFF 1.) Defective Starter Motor Solenoid (Replace Solenoid) 2.) Shorted Diode in Alternator Warning Lamp Circuit (Replace...

I know what I'd look for first... a bad/open ground. First look under the hood, front of engine compartment just behind the headlights, left and right side, there are ground wires leading to the right/left side marker lights held down with sheet metal screws. Make sure those contacts are clean...

I have the same complaint (issue) with the vertically mounted thermostat slipping out of its cylinder head recess while trying to assemble the gasket/cap. Not the best design.