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#1
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who can read piston skirts?
Check out these pistons from a bent rods 603 -
Do the wear marks on the piston skirts indicate bent rods or something else? FWIW, the #1 rod was measurably bent such that the leading edge of the piston was lower than the trailing edge. In the picture, there is more wear in the trailing edge of the skirt of the #1 piston. I couldn't measure any bend-ness in the #2 or #3 rods, which could simply reflect my lack of means and knowledge. Neither could I measure cylinder liner wear, out of round-ness, etc. I've led the discussion with my thinking but does anyone think the wear in #1 indicates a problem other than a bent rod? Sixto 87 300D |
#2
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#1 appears to have had more heat than the others, lending to the flare on the trailing edge?
__________________
1987 560SL 85,000 miles Meet on the level, leave on the square. Great words to live by Were we directed from Washington when to sow and when to reap, we should soon want bread. - Thomas Jefferson: Autobiography, 1821.
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#3
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It looks like excessive heat to me, too. So now the question is... Why the excessive heat?
And the answer is likely just a worn out engine. As the bearings get worn in the crank, the cam and even the wrist-pin things can get out of tolerance and all the adjustment in the world will not help it. But if these tolerances get too far out there is more friction and that means more heat and that leads to damage. The rod bending would lead to a heat build up and that could effect the other pistons that were close. It looks like it is time to call in a professional machine shop for the real answers. |
#4
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I've rammed my piston under some skirts in my day.
__________________
For the Saved, this world is the worst it will ever get. For the unSaved, this world is the best it will ever get. Clk's Ebay Stuff BUY SOMETHING NOW!!! |
#5
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How come this thread is in OD & not in DD ?
__________________
Grumpy Old Diesel Owners Club group I no longer question authority, I annoy authority. More effect, less effort.... 1967 230-6 auto parts car. rust bucket. 1980 300D now parts car 800k miles 1984 300D 500k miles 1987 250td 160k miles English import 2001 jeep turbo diesel 130k miles 1998 jeep tdi ~ followed me home. Needs a turbo. 1968 Ford F750 truck. 6-354 diesel conversion. Other toys ~J.D.,Cat & GM ~ mainly earth moving |
#6
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Read the post above yours... lol
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1991 560 SEL / 185k miles 1992 750il / 17k miles - project car |
#7
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Bent rods have been discussed to death on DD. I'm putting it before a fresh set of eyes.
Sixto 87 300D |
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