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  1. S

    Head Bolt Differences?

    Hey Guys, I have to buy new bolts for my 1989 4.0 engine head. Curious to know why the 96-01 bolts are 1/2 the cost of the 84-95? I can buy a set of bolts for 96-01 for $25, while 84-95 is $60! Looked up pictures of both sets, they look exactly the same. So why the huge difference in cost? Are...
  2. S

    Valve spring issues

    Hey guys, got myself into a bit of a snag. First off, I bought myself the Comp Cams 68-232-4 camshaft. Then since I found out Comp doesnt have matching springs that fit out 4.0 head, I found on jeepforum.com an article that someone had said they were running the same cam with a set of Sealed...
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    Compression Ratio Confusion... help!

    Trying to see if Im doing this correctly... Bore, 3.895" Stroke, 3.41" Head, 57cc Dish, 17cc Deck Clearance, .078" Gasket Thickness, .045 = 7.79:1??? Using Summit Racing compression ratio calculator. I know stock specs of the 4.0 (242) should be 8.8:1. My numbers should be stock, what am I...
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    AW4 Swap

    Hey all, new to your forums I came here from jeepforum.com. I had a simple question hoping for a quick answer. I read the sticky for the AW4. I know it is interchangeable to a degree. I have a 1989 XJ that I have pulled the drive train out for reasons. AW4 faulty, and engine could use...
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