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Rod bearing wear
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Acguywill View Drop Down
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Joined: 15 Jan 2024
Location: Vauxhall ab Can
Points: 189 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Acguywill Quote  Post ReplyReply Direct Link To This Post Topic: Rod bearing wear
    Posted: 3 hours 46 minutes ago at 1:15pm
So this is a picture of a rod bearing from the engine I had the antifreeze issue with.
All six bearings have the same mark in the same place. What caused it? It is deep and can easily be felt. The crank looks and feels fine.
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WF owner View Drop Down
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Joined: 12 May 2013
Location: Bombay NY
Points: 5144 		Post Options Post Options   Thanks (0) Thanks(0)   Quote WF owner Quote  Post ReplyReply Direct Link To This Post Posted: 3 hours 26 minutes ago at 1:35pm
Antifreeze has/is glycol. Glycol is in the glucose (sugar) family. Antifreeze in the oil reduces the ability of oil to lubricate the crankshaft.
At a very minimum, you have to first eliminate the coolant in the oil. I would change the rod and main bearings. The crankshaft should be measured (miked) to see how out of round it is.
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Lars(wi) View Drop Down
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Joined: 14 Sep 2009
Location: Permian Basin
Points: 8333 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Lars(wi) Quote  Post ReplyReply Direct Link To This Post Posted: 2 hours 3 minutes ago at 2:58pm
Originally posted by Acguywill Acguywill wrote:

So this is a picture of a rod bearing from the engine I had the antifreeze issue with.
All six bearings have the same mark in the same place. What caused it? It is deep and can easily be felt. The crank looks and feels fine.

Ouch!!
I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science.
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bigal121892 View Drop Down
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Joined: 05 Jan 2010
Location: Nebraska
Points: 819 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bigal121892 Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 15 minutes ago at 3:46pm
You said the engine had been sitting for four years, I wonder if just the fact that the crank was sitting in that one spot for that long, could have done that. 
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Les Kerf View Drop Down
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Joined: 08 May 2020
Location: Idaho
Points: 1552 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Les Kerf Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 14 minutes ago at 3:47pm
That doesn't look like frictional wear but rather more like a chemical reaction dissolving the bearing material Confused
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