Cracked head repair, is it possible? - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 05-30-2008
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Cracked head repair, is it possible?

Well my father-in-laws 94 4.0 gave up last week with milky white oil. Well I got the engine torn down and was cleaning it and getting ready to put it back together, and I found a nice 2 inch crack in the passenger side head.

Can the head be fixed or are we out of luck?
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Old 05-30-2008
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Dont hold me to this, but I think it might be possible to weld the crack. Though considering 4.0 ohv's are a dime a dozen it might be worth just getting a new one to be safe.
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Old 05-30-2008
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I figured that I would probably have to get a new one, but I really didn't want to resort to that. I was trying to save them money by changing the gaskets and fixing the motor.

I guess we will have to call around on monday and see how much a used OHV is going to cost and then tear that one down and replace the gaskets on it. Then i will get someone else to swap the motors, lol, b/c I am not looking forward to doing that.
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Old 05-30-2008
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Call a machine shop, they can tell you if it can be fixed, and if not can line line you up with heads for a good price. You don't wanna skimp out here as it will make all that work worthless.
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Old 05-30-2008
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You don't need to replace the whole motor. Replacing the heads will be so much cheaper. They can be picked up from a good junkyard motor or found all over the internet.
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Old 05-31-2008
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I am not going to replace the motor, I just need to find the head for sale.

I am calling a machine shop on monday to see how much they charge.
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Old 06-01-2008
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I would just buy a new head. I picked one up for $230 from "Ideal Cylinder Head" for my 99' fully assembled with valves & springs. I called around to the local shops and they all wanted $100-$150 for a used head that would automatically require magnaflux to determine if it was OK to use, and milling work, so I figured screw it and I ordered a new fully assembled head that was ready to drop in.
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Old 06-18-2008
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Well we got two new heads fully assembled for $400.

Well I am about to put it back together and I think I found the start of the problem. The front right piston is broken and missing a few pieces. Looks like it was only a matter of time before it died.
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