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Gotcha, Yeah that's why I use a lead hammer.... I can hit it pretty hard without damaging anything but the lead hammer lol.... Good luck with it...it's really not that hard... Jess

Well IMO it isn't difficult..... I place the rocker arm assembly in my vise clamping the tight arm and using a lead hammer (or any other soft metal hammer) and blaster for lubrication, I tap the shaft through the rocker arm... The rocker arms are tight when you get to a place on the shaft that...

You can soak the lifters for weeks and you'd never get all the small air pockets out of them unless you actually worked each lifter while submerged.... Too much work when they will pump up in a minute or two after the initial start-up. I soak for 4 hours and leave the rest to start up.

I have never replaced the bolts on the 8 or 10 I've overhauled.... Nor have I used Loctite.

Yes it is a very simple job..... Once you remove the valve cover there are three bolts that hold the Rocker arm assembly to the head, you remove those bolts and the rocker arms will lift off still attached to the shaft. From there you can remove the cotter pin and remove the rocker arms and...

I purchase all the rockers from AutoZone or Napa and they are around $8 each... Make sure you flush the rail out and get all the garbage out of it... Use a paperclip and verify all the oiling holes are open. In regards to the products I spoke about in an earlier post.... I have now used...

Thank you, I would have to say yes, the lifters will take a while to pump up if they are contaminated with sludge and debris or excessively worn and leaking (not pumping up) but once they do pump up the tapping will stop as long as the rest of the valve train is not worn as in my post above...

I've rebuilt several of these 4.0 OHV'S with a loud top end... 99.9% of the time I find between one and five rockers severely worn while the rest look just fine.... I replace the worn rockers and the noise is gone... Just food for thought but here's a visual for you guys. I'm attaching...

That is exactly how mine looked except I had much more sludge.... it was terrible. I appreciate the info.... I'm rebuilding mine now and giving it to my 16yo daughter. I maintain 5K oil change intervals using Amsoil oil so it should be fine from here on out. Amsoil doesn't sludge and can...

I can try..... I have already torn most of the engine down and I'm only rebuilding the bottom end, or what is damaged... The rest looks ok. The heads were just done 13 months ago so I'm not going to mess with them.

I just bought a 97 Explorer with 100K on it with zero oil pressure... Dropped the pan and there was three inches of solid sludge..... So much the pick up screen was submerged which equals zero oil pressure. I've read all over the net that this is a common problem with these 4.0's if they are...

I just purchased a broken down 1997 Explorer XLT from a guy who said the oil pump failed. It has right at 100K on it. Sure enough it has zero oil pressure. I pulled the 4.0 OHV and pulled the oil pan and the bottom of the pan had a solid 3 inches of sludge...So much the oil pump screen was...