I've of course got tons more photos of this build than I'm posting here, so if anyone has specific questions about some part on their 4.0, chances are I've got a photo of it. Here we have the new cylinder head from Clearwater Cylinder Heads. Straight-forward company to deal with. My engine, being in a 2001 Jeep, has the notorious 0331 cylinder head. It flows decent but is very prone to cracking between the #3 and 4 cylinders. Mine wasn't visibly cracked but it had been overheated badly and the evidence pointed to a warped head. I didn't bother to check it, for the price the Clearwater head was only a little more than rebuilding the old one and it offered a better design. The Clearwater head is a cheaper alternative to the Alabama head. Both have beefed-up material in problem areas and should be a lot more durable than the stock head. We'll see...although I don't intend to run without coolant for extended periods like the previous owner did. The timing chain is unfortunately not a roller chain like I wanted but since I'm using a cam for a 258ci AMC engine (the 4.0 is based on that motor) I had to use a special gear set which is only offered for the stock-type plate chain.
Since I like my Mopars, and Jeep has been a part of that family for a while, I decided to go with Hemi Orange paint instead of the boring black. There will be plenty of wiring and hoses and stuff obscuring the engine once it's fully installed but hey, it needed paint either way and it'll stand out a little better like this. I just wish the machine shop had actually cleaned the block better like I asked them to, would have saved me some prep time.
This is the exhaust setup I'm going with: Gale Banks Torque Tube header and factory Y-pipe. I had ordered a Rugged Ridge header which is the same design only $140 cheaper, but of course they were indefinitely out of stock. The Banks unit has a lifetime warranty, not sure if the Rugged Ridge does. I liked the 1/2" thick flanges and 409 stainless of these pipes, plus they are an attempt at being closer to equal-length. Too bad this year Jeep has all those catalytic converters on it or else I could have used a real header.
'08 RE Bullet 500
'01 Jeep XJ