metal shavings in the screen

[karu]

I bought a used engine (AEIO 360 B1H) with about 150 hrs a little while ago. The seller told me that he found some metal shavings in the screen, suggested that cam and lifters may be damaged. Pulled #3 cylinder and cam and lifters are in good condition. Pulled #2 and possibly found the culprit. Actually, I found two of the push rods have similar marks. Replaced all the shrouds even with a hint of damage. I am hoping this is what created metal shavings.
While it looks somewhat bigger in the picture, the dent in the shroud is barely visible.

 

[vic syracuse]

Hmmm. I'd be curious if those are jsut rub marks or they were really being shaved. I would check the filter and sump screen again after 10 hours. We just pulled the screen on an O0320 that was completely overhauled about one year and 100 hours ago and found the sump screen almost blocked with shavings, necessitating a teardown. All 4 oc the connecting rods were shaving metal from the crankshaft.

 

[DeltaRomeo]

Thanks for the update, and I hope you have your engine issues resolved.

I just wanted to say how nice it is to see those pictures in bigger-than-actual size using my desktop monitor. Posts like this are going to help builders and pilots. Thanks for posting it.

v/r,dr

 

[Majorpayne317641]

Hmmm. I'd be curious if those are jsut rub marks or they were really being shaved. I would check the filter and sump screen again after 10 hours. We just pulled the screen on an O0320 that was completely overhauled about one year and 100 hours ago and found the sump screen almost blocked with shavings, necessitating a teardown. All 4 oc the connecting rods were shaving metal from the crankshaft.

View attachment 53942View attachment 53942

That’s terrible. I don’t know how someone can do that unless they didn’t do any dimensioning prior to assembly?

 

[karu]

Thanks for the suggestion Vic. I am still in the build phase (it actually is a cozy mk iv, not an RV ). I will be doing a lot of ground running and checking the newly installed filter from time to time.

 

[vic syracuse]

Thanks for the suggestion Vic. I am still in the build phase (it actually is a cozy mk iv, not an RV ). I will be doing a lot of ground running and checking the newly installed filter from time to time.

I would encourage you to NOT do a lot of ground running. It’s really hard on the engine. The combustion byproducts end up causing a lot of corrosion in the engine as the engine temp really never gets high enough on the ground.


Vic

 

[Caveman]

Replaced all the shrouds even with a hint of damage. I am hoping this is what created metal shavings.

Karu, I may have misunderstood the meaning of the above quote...
Are you referring to push rod tube damage? If so, have you rolled the push rods over a piece of glass plate to check for straightness? You might have a sticking valve.

 

[lr172]

I would keep looking. Those are light wear marks and would NOT produce shavings in the screen. At least not visible to the naked eye.

 

[karu]

Vic, I will be careful and keep ground runs to a minimum.

Caveman, I have not rolled them over a flat surface. I visually checked the straightness. I will double check with a glass.

Ir172, the second posting is from Vic in a different situation. Seller showed my the shavings and it was quite a minuscule amount compared to the one in the picture.

 

[karu]

Just checked the damaged pushrods on a glass surface. They are not bent.

 

[thehagg501]

Karu, are those shavings aluminum or ferrous metal?

 

[DanH]

Those polish marks are unusual. Contact with the shroud tube or something else?

 

[karu]

With changes

Those polish marks are unusual. Contact with the shroud tube or something else?

View attachment 54044

DanH. With changes to the forum I forgot to check my own post.

I am guessing that is the reason. Shrouds were dented in all the cases and the dents matched the shiny spots in the rods.

 

[karu]

Karu, are those shavings aluminum or ferrous metal?

I did not check the actual shavings. The seller showed me a picture of the the screen with metal particles.

 

[DanH]

Shrouds were dented in all the cases and the dents matched the shiny spots in the rods.

That would explain the pushrod polishing, but not shavings.

I did not check the actual shavings. The seller showed me a picture of the the screen with metal particles.

Better keep digging.

 

[karu]

I pulled #2 and #3 cylinders (one at a time and also torqued down the through bolts before turning the crank) and did not see trouble anywhere including cam and lifters. Plan is to run the engine once I finish and check again within a short time.

 

[lr172]

I pulled #2 and #3 cylinders (one at a time and also torqued down the through bolts before turning the crank) and did not see trouble anywhere including cam and lifters. Plan is to run the engine once I finish and check again within a short time.

Not to question your approach here, but if the screen has visible metal shavings, you DEFINITELY have a problem, whether you can see it or not. Flying it around and checking again later seems like a bad idea if there were truly "shavings" in the screen. If it were a small amount of fine dust like material, I might think differently.

Larry

 

[thehagg501]

I believe none of what I hear and half of what I see.
Cut open the oil filter, lay out the media and see what we have.

 

[karu]

I may have used the wrong word. It was actually some small metal particles.
thehagg501. I bought this engine used. Previous owner had showed me only a picture.

 

[thehagg501]

Suggestions if Metal is Found in the Screens or Filter

Because the failure to look for metal in the screens and filter, or ignoring what is found, can lead to catastrophic engine failure, we’ll attempt a logical approach to the proper action to be taken when metal shows up in the oil screen or oil-filter cartridge.

www.lycoming.com