Search Results for ‘4.0 engine’

I’m in the process of building a 4.0 from the ground up. I started with 1987 4.0 and stroked it out to 4.6. It has a 1995 7120 ported head and larger LS valves. The CR is +12:1 and will run on propane. Ultimately the engine will be installed in an antique truck. There’s a lot more that will be...

Hello, My 1989 Jeep Cherokee i6 4.0L is making a weird crackling noise. (See attached video link) https://gopro.com/v/nrDOazEwyowd7 This noise only occurs when going from a stopped position and accelerating. Can be heard with first or second gear take offs. However while already moving and...

I've got a 2001 TJ Sahara that I've had since 2011. This past year it has started to have some shifting problems. Until the engine warms up, or runs for 15 minutes or so, it drops 1st gear and shifts hard. After about 10-15 minutes running I don't seem to notice any issues. I'm assuming the...

advice please —- accidentally overfilled my 2001 wj 4.0 42re trans with 1 a quart over of trans fluid . I honestly don’t feel like changing or pumping it out it unless nessasary - Think this will be an issue? The jeep has 311k miles on it but is it Something to worry about? Seems to shift fine...

I have a 98 ZJ. I've done quite a bit to the engine with more to come. Trying to squeeze as much as I can out of a 4.0 without stroking it. My BIG question is about the intake and exhuast. I've replaced the intake with a 99+ but had to do a little percusive maintenance to make the new exhuast...

Hi there - I’ve tried searching the forums for answers prior to posting this, but haven’t found anything that quite fits my problem, so thanks in advance for any help!! This past Saturday, my Jeep was running fine for about an hour. I made a pit stop at a store, and within minutes of it being...

Just wanted to show it off

So I looked across all the forums and tried to diagnose my particular problem but couldn’t seem to find it. my 96 zj with the 4L runs at a perfect 195 most of the time until I turn on the ac then. It climbs into the 240+ range (I don’t leave it on to find out if it hits the red). This happens...

I have an '04 WJ with the 4.0L engine. The Jeep is in excellent condition after just turning over 80,000 miles. A couple months ago, I began to notice a high pitched whistling noise when the motor was at idle. The noise does not happen under throttle. The noise occurred intermittently at...

Have owned this vehicle for almost 10 years. Graduated college in 2019. Intended to rebuild and use it as a toy. Unfortunately, my finances and free time did not allow for it. Engine still runs and vehicle still drives (if you want videos please message me!). All four-wheel drive options...

Hey wj'ers. My 01 4.0L has this "buzzing" noise that sounds off when going at highway speeds only after a while of driving. Its coming from the engine area. I would check the gauges and nothing out of the ordinary. The moment I pull over to check. The buzzing stops and I have no idea where its...

Hey folks. I hope that whenever you come upon this thread you're having a good day and doing well. I have a 1990 Cherokee, with the manual, and the 4.0 I6. I've decided that I adore this vehicle enough that I'm going to try and make it the best possible Jeep (and possibly buy a 1990 Comanche...

I found a TJ about a month ago that looked like a decent deal. 4.0L, 5-speed manual. The previous owner saw fit to install aftermarket performance upgrades, including throttle body spacers. Anyway, it's losing coolant pretty quickly and I thought I'd ask here and see what y'all think. I have...

Hello! I'm new to the forum. I bought my first Jeep yesterday. It's a 2001 Cherokee Sport with a bad engine and probably bad everything else, too. But it was cheap and I'm excited to fix it up with my teenage kids. It was advertised as having a bad head gasket and misfire on cylinder #3...

I have a fresh rebuilt spare engine in my shop on a stand, a 258/4.2L with a 4.0L head installed. I was going to drop it in my 84 CJ with fuel injection, but I had some "life happens" moment so I had to put the CJ in storage for awhile. My daughter has lost compression in cylinders 5 & 6 on...

Hello all, I've been looking at buying a 1996 Jeep Cherokee XJ Sport 4x4 with 190k. My question is, how many miles could I expect to get out of it with standard maintenance? I've heard of the 4.0 going for 300k sometimes, but as I have limited maintenance records on this engine is it worth the...

Zip37027ModelWranglerKeywordsWrangler 4.0 Liter Engine, I^StateTNCityBrentwoodPrice1300ShippingLocal Pick-up ,Will ShipPaymentPayPal ,Cash Only2004 Jeep Wrangler 4.0 Liter I6. 19,000 miles. Runs perfectly - pulled to install a Hemi. The starter, throttle body and all accessories are included...

I was reading some threads and I came across a guy who put the 4.0 head on his 4.2 block so he could convert it to Fuel injection. Does anyone know if this can be done and is it an easy swap or are there many complicating factors. I am new to advanced wrenching but not scared to dive in and...

I usually use Pennzoil SAE 10w-30 for my 1990 Cherokee 4.0L, but this time I decided to use Chevron Supreme SAE 10w-30 because I had it laying around the shop. Before the oil change i had 149,997 miles on it and used Pennzoil like I have in the past, and a Fram can of death "no problems...