Hard Build Up around top of cylinder...
09-03-2017, 04:33 PM
#1
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Year: 1999
Model: Cherokee
Engine: 4.0 I6
Hard Build Up around top of cylinder...
Getting ready to put head back on.
Trying to remove hardened substance at top of cylinder 2. See pics. Razor does not remove... almost like a rust. It was there when we removed the head. Should I be concerned about this?
Trying to remove hardened substance at top of cylinder 2. See pics. Razor does not remove... almost like a rust. It was there when we removed the head. Should I be concerned about this?
09-03-2017, 05:22 PM
#2
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Thats normal its just as far as top ring on piston goes up leaving it alone best. You can remove it with a ridge reamer but any small specs that fall in cyl will damage wall and ring. Causing bigger issues.
09-03-2017, 06:01 PM
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Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
What free said.
If you aren't removing the pistons, you don't need to worry about it.
If you decide you just have to have it gone, rent a ridge reamer, and make sure you don't let any shavings fall down into the pistons. One way to keep them in place is to liberallly coat the top of the piston with heavy grease, making sure to create a nice angled glob around the edges. Kind of like caulking it. The metallic debris will fall down and stick in the grease, then you can remove the grease with a putty knife, taking the particles with it. Carefully and completely clean the area before you use something to clean out the grease film that's left.
That's how the old-timers did it.
If you aren't removing the pistons, you don't need to worry about it.
If you decide you just have to have it gone, rent a ridge reamer, and make sure you don't let any shavings fall down into the pistons. One way to keep them in place is to liberallly coat the top of the piston with heavy grease, making sure to create a nice angled glob around the edges. Kind of like caulking it. The metallic debris will fall down and stick in the grease, then you can remove the grease with a putty knife, taking the particles with it. Carefully and completely clean the area before you use something to clean out the grease film that's left.
That's how the old-timers did it.
09-03-2017, 06:07 PM
#4
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Year: 1999
Model: Cherokee
Engine: 4.0 I6
What free said.
If you aren't removing the pistons, you don't need to worry about it.
If you decide you just have to have it gone, rent a ridge reamer, and make sure you don't let any shavings fall down into the pistons. One way to keep them in place is to liberallly coat the top of the piston with heavy grease, making sure to create a nice angled glob around the edges. Kind of like caulking it. The metallic debris will fall down and stick in the grease, then you can remove the grease with a putty knife, taking the particles with it. Carefully and completely clean the area before you use something to clean out the grease film that's left.
That's how the old-timers did it.
If you aren't removing the pistons, you don't need to worry about it.
If you decide you just have to have it gone, rent a ridge reamer, and make sure you don't let any shavings fall down into the pistons. One way to keep them in place is to liberallly coat the top of the piston with heavy grease, making sure to create a nice angled glob around the edges. Kind of like caulking it. The metallic debris will fall down and stick in the grease, then you can remove the grease with a putty knife, taking the particles with it. Carefully and completely clean the area before you use something to clean out the grease film that's left.
That's how the old-timers did it.
Based on your comments, I need to make sure that they are clean.
My plan is to wipe out and shop vac each cylinder.
Anything else you would recommend? Should I add the oil now or is there no point.
09-03-2017, 06:24 PM
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Alright guys ... I'm gonna be THAT guy. I cleaned the block mating sureface off with Wd-40 and a Scotch Pad. But I did not do anything to keep debris from going into the cylinders.
Based on your comments, I need to make sure that they are clean.
My plan is to wipe out and shop vac each cylinder.
Anything else you would recommend? Should I add the oil now or is there no point.
Based on your comments, I need to make sure that they are clean.
My plan is to wipe out and shop vac each cylinder.
Anything else you would recommend? Should I add the oil now or is there no point.
09-03-2017, 08:45 PM
#6
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Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
Sounds like a reasonable plan. Do good work with a crevice tool. The edges are where the stuff will hide.
Then like free said, slap it together and run it.