Mos68x
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I kinda have to now, the money that I had for the head now has to be used for insulation for my house.I would not wait, go with another source.
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I kinda have to now, the money that I had for the head now has to be used for insulation for my house.I would not wait, go with another source.
http://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=toolt&th=309303Well the air hammer idea didn’t work, it didn’t even budge the #1 or #2 liner with full pressure in the tank. I think I may have to go back to my original plan of a threaded rod since I just don’t have enough area for a good solid swing, especially on #3  where the front diff is in the way.
if anyone has any different ideas I’m all ears. I got plenty of time till the motor is ready to go back together.
I’m assuming you went at it from underneath and used the weight of the front end?http://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=toolt&th=309303
I have always used the bottle jack and puck methods.
Do it right the first time while it is apart. If you can afford to replace what you believe to be bad then do it while you have it apart. Do you really want to go thru it again? Likely not as you are not having to much fun with this one. Do it right the first time cause you don't want it to be that "one" you thought would be ok to come back and bite you.Ok, I got the #5 & #6 liners out as well as all of the pistons. The #5 #6 pistons are junk, and #3 might be as well. I didn’t get out and work on the engine today since the rain showed up and hasn’t gone away yet. I also borrowed a cylinder honing tool from the neighbor and I’ll put new crosshatching in the old liners that are still good. I’ll see if I can save the #5 & #6 liners with the honing tool but if I can’t then I’ll just throw new ones in. I’ll probably also reuse any of the good pistons that I can. Hopefully this way I’ll have enough parts next time I have to dive into this motor.
On a side note, what causes the valve seats to drop in these engines? I did have cracking in the head in every cylinder, so I’m curious if what caused that may have caused the valve seats to drop. It never overheated on my watch over the last year, so I’m guessing any overheating was done by one of the previous owners, private or military.
Oh no worries, I won’t be “that guy” and engines aren’t where I allow any kind of redneck engineering lolDo it right the first time while it is apart. If you can afford to replace what you believe to be bad then do it while you have it apart. Do you really want to go thru it again? Likely not as you are not having to much fun with this one. Do it right the first time cause you don't want it to be that "one" you thought would be ok to come back and bite you.
Yup, wut he said.Overheat usually causes both. Drops seats due to head expansion, and causes the narrow piece between the intake and exhaust valve to crack, especially if cold water was poured in with engine off and then started and sucks it in. Largest thermal difference between the two valves, across the smallest amount of metal.
I was hopin you chime in soon. I’ve already decided not to reuse anything I have replacements for, but thanks for the heads up on your experience with trying to reuse the liners.Mos, this version of the C was.....growing pain.....for Cummins. Theses were prone to head cracking and dropping seats, and the dreaded block crack between liners. Can't tell you how many garbage trucks I did head jobs and block replacements on. Most likely nothing anybody let happen. If you use it hard, there is a greater than 50% chance it will happen again, head crack anywho, high temps, +200, have a big to do with the block thing
Don't hone the liners, send them to the scrap pile, we tried that to try and save out of warranty customers a little money and it ended up costing the Co because the engine turned into a giant oil pump in short order. We built it so we had to stand behind it.
As someone posted up a bit ago, do it the right way the first time. Also, if there is ridge at the top of the liner, the engine has had a dirt diet sometime in it's life, check ALL of your intake hoses/piping and put a filter in it, make sure the filter seats in the housing.
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