FourthGenSS
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Found this in my oil on today when I changed it. Truck still starts and seems to run fine. Any idea where it came from? Calipers are open 1-1/2” for a reference. Thanks
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NHC250 metal in oil
- Thread starter FourthGenSS
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@WillWagner might recognize it if it's from the engine
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Looks " extruded" . What's it made of? Magnetic or no? The only thing I can think of that is 2" is a cam bushing, but they don't fail like that, all peeled out. An accessory drive bushing can fail like that...seen it a few times, but there is usually an oil leak associated with it.
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FourthGenSS
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It is magnetic. Parts were stuck on the drain plug, so I used a flexible magnet to reach in and fish the rest out of the pan and got these two big chunks which require bending to get through the drain hole. I will check for oil leaks. I just got the truck and the fuel pump started leaking on it the second day I had it so once I got done fixing it I changed the oil and found this. Thanks
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That's only you're 5th post so welcome aboard to the marvel mystery metal monitors of Steel Soldiers. Normally I wouldn't reply because I don't have your answer but you made me spit coffee so I had to say thank you. I expected to see different color shavings or some fine silver cream but when I scrolled down to the pictures the bird part of my brain spit coffee. That was a shocker. The real surprise is that it's running fine so let's hope that continues to be the story.
If anyone has seen that in an engine before it'll be someone here.
FourthGenSS
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Ha! Thanks. Chunks or fragments might have been a better description. It was definitely a sinking feeling as I pulled them out along with a fair number of the smaller pieces.
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Wait to put the pump on. If it is an accessory drive bushing, it will come off again. Take the belts off....yes, it is a PITA and the pump might spring a leak at the seal washer....And grab the drive pulley. There should be slight play there. If you have the means, pull the pulley and have a look at the cover. If that part is the bushing, the cover will be blackened in the direction of which ever belt(s) were too tight.
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I wonder if it could be part of an oil filter?
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Very interested in the outcome as I am at a loss where those pieces came from. I would just be giving wild guesses.
Mark
Mark
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Don't think so. It looks like it was pushed out under pressure...extruded. A rod or main won't do it like it looks , looks way thinner, very blue and usually a thin, wide sheet, AND there will be a very noticeable knock. A cam bushing normally doesn't fail like the picture. They like to weld themselves to the cam leaving only magnetic dust on the plug magnet and lots of smoke out the blow by tube, we're talkin' SMOKE!. The block actually shrinks when that happens and all that is needed is to line bore the cam bushing web to get things right. My un-educated guess is a failed bushing somewhere in the accessory drive. The most likely would be the one in the front cover, but, I have seen the one in the drive housing go away too, but it's kinda rare. This usually happens from an over tightened belt. Kinda hard to do with the WP belts IF it has the eccentric WP installed, I have seen the NHC with the more modern suitcase WP installed, which would make it very easy to over tighten. And, the PS pump can be over tightened in both versions.
What WP does the OP have? Pics of the front of the engine or just the F/P side will do.
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An oil analysis (Like from Blackstone) would be informative. The type metal of the wear products is important. If there is no indication of bearing material you might get really lucky.
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That will tell you if whatever the failure was, is not there anymore, been fixed prior to the new owner buying it IF a negative report. If the anal sys shows copper, aluminum, steel/iron, still a guess as to where it is coming from. Did that make sense?
davidb56
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looks like part of a seal to me. Was there is any spall specs of rubber when you drained the oil?
FourthGenSS
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Oil filter was fine. The only thing that really leaks much is the PS Pump and leaks down the side of everything. The front main has leaked some, but not substantially. All belts have some deflection in them (no banjo string tight). I can get better pictures tomorrow.
FourthGenSS
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Seemed to be all steel. I drained into a large catch bin (Walmart Tote) and used a small bucket to put the used oil in jugs. The last bit I poured down the side of a large funnel and had a dozen fragments of the same metal. Didn’t see much else.
davidb56
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its the sarrated groves in the metal that should give you a clue to where it came from, or what part it came off of. maybe a rebuilder would have a idea.
FourthGenSS
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Was my hope, I couldn’t place it.
The serrated grooves are not unlike a chip as metal is turned from a lathe. Either something really bad happened or this is debris left over from manufacturing. If the engine runs without unusual noise and full oil pressure I would guess the latter.