I can pretty much agree with the assessment that at 84K miles, (and last 30 thousand of those miles with oil that turns black in 1 or 2 hundred miles) that rings and cylinders will be worn. But I dont have much of any experience with such, and am trying get a better understanding of what ever I can.
And I recall some folks saying that if cylinder is worn that can feel a hump in cylinder at the top of the rings travel.
At first I thought I could not feel anything, but after trying again and again, I think I can feel a little little bit of something.
Let me describe more what I have observed, and maybe some of you more experienced folks can provide some words of wisdom.
I know pic cant really show what need to see, but.....
Other thing, with piston at very top, I can try to push it back-forth or side-to-side and dont really feel or see any movement, but if do look real close can see oil maybe push out a very little on one side and down on other side.
Bore service limit in FSM is 72.08mm 2.8378"'.
And I see the engine spec is bore of 72.0mm 2.835"
Gee, surprisingly small difference.
I finally recieved the expanding bore gauge I ordered 3-4 weeks ago (to go with the micrometer I have, both cheapies.)
SO thought I would give it a try. But, I dont really think I can measure that accurately, to detect such a small difference.
But golly, I get a measurement right at 72.0 mm
But now that I think of it, that was down in deep (so piston top could help me get it straight across).
I should try more tommorow up nearer top of the stroke. WOuld that be different? Maybe hotter there?
And I recall some folks saying that if cylinder is worn that can feel a hump in cylinder at the top of the rings travel.
At first I thought I could not feel anything, but after trying again and again, I think I can feel a little little bit of something.
Let me describe more what I have observed, and maybe some of you more experienced folks can provide some words of wisdom.
I know pic cant really show what need to see, but.....
Other thing, with piston at very top, I can try to push it back-forth or side-to-side and dont really feel or see any movement, but if do look real close can see oil maybe push out a very little on one side and down on other side.
Bore service limit in FSM is 72.08mm 2.8378"'.
And I see the engine spec is bore of 72.0mm 2.835"
Gee, surprisingly small difference.
I finally recieved the expanding bore gauge I ordered 3-4 weeks ago (to go with the micrometer I have, both cheapies.)
SO thought I would give it a try. But, I dont really think I can measure that accurately, to detect such a small difference.
But golly, I get a measurement right at 72.0 mm
But now that I think of it, that was down in deep (so piston top could help me get it straight across).
I should try more tommorow up nearer top of the stroke. WOuld that be different? Maybe hotter there?
