Thinking of buying a 6V92, had oil analysis done, marginally elevated Fe?

[daveola]

The sample cost something like $60 for each, it was sent to Detroit Diesel and was pulled by the mechanics who are checking the bus out.

[luvrbus]

The sample cost something like $60 for each, it was sent to Detroit Diesel and was pulled by the mechanics who are checking the bus out.

Labs can only test the samples they have no idea where and how it was taken,I have seen people (mechanics) pour oil from a oil filter into a sample bottle before a big No/No  

[Geoff]

I don't like the scuffing on the pistons and liners.  This would not make a drop in replacement.  I would pull the heads and oil pan, and look at the pistons, liners, and all the bearings.  Then take it from there.  That engine might have been overheated and patched.

--Geoff

[daveola]

I don't like the scuffing on the pistons and liners.  This would not make a drop in replacement.  I would pull the heads and oil pan, and look at the pistons, liners, and all the bearings.  Then take it from there.  That engine might have been overheated and patched.

The bus is up in Oregon, and I'm not sure I can find someone (or spend more money on a bus I haven't bought yet) to do all this.

You are assuming scuffing on pistons/liners because of the 100ppm Fe?

[daveola]

Evidently the sample (for the engine) was taken from the drain plug.

[luvrbus]

Evidently the sample (for the engine) was taken from the drain plug.

You never pull a sample on the drain stream like the drain plug on the oil pan

[PP]

You never pull a sample on the drain stream like the drain plug on the oil pan

It would be fun to watch though 

[eagle19952]

oil sample tool:

[lostagain]

I quit doing oil samples for the bus a couple of years ago. Too stressful looking at the results. I change the oil regularly, and look for antifreeze and metal shavings when I drain it. I listen to the engine and  transmission when I drive. That has served me well for 40 years in all my vehicles and various machinery. Keep it simple...

JC

[luvrbus]

LOL samples can be stress full,JC just for the hell of it I took a sample from a 8v71 that the oil had been changed 1 time in 15 years, believe it or not it came back with only high levels of silicon.
I could see that with the oil bath filters they are always on the high side .I am guessing because it leaked so much it always had clean oil. I was amazed thinking it would have high levels everything except AIDs.Makes me wonder now about your theory on changing oil at least once a year     

[HB of CJ]

Respectfully.  Some help here please.  Have I been doing it wrong for 55 years?  Maybe so.   We were taught to let the vehicle come up to normal operating temps then pull the drain plug, let the oil pour out for a few moments or seconds, then get what is called a "clean catch" into the sample bottle.  A messy fun job guaranteed to get some laughs.  Is there a better way today?  Yikes! 

Funny that the technique taught for catching a hot oil sample was about the same as catching a medical patient urine sample.  Only the patient does his own catching.  Sometimes the RN has to do the catching.  Yuck!  Sometimes a sight to behold for all involved.  Prison drug testing.  More Yikes! 

HB of CJ ex RN.  an Old Coot!    No dog in this.

[windtrader]

We were taught to let the vehicle come up to normal operating temps then pull the drain plug, let the oil pour out for a few moments or seconds, then get what is called a "clean catch" into the sample bottle.

That is the procedure I know. Even more than a few seconds, ensuring enough time to get all the stuff that may be settled near the plug. My understanding is good fleet managers take samples regularly and do make decisions based on the trending of the samples, like when to put the vehicle up for sale before getting stuck with a big repair.

[luvrbus]

Most diesel engines of today have a port just just for oil sampling,I was taught to take a sample as Henry described then I was re programed years later to never take one on the drain stream.
I don't know of any major diesel engine dealer that will take samples from the pan plug for the past 25+ years.To answer the question Henry yes there are better methods safer, cleaner and  better.
I take oil samples for Garys 12v71's in his boat one would be in a hella of shape looking for a drain plug on the pan with the dry sump 12v71's.
Times are changing for us older guys Henry some of the kits come with special cutters to cut the tubing with now no more razor knifes or scissors.
FWIW I always take 2 samples from the same engine if the 1st sample is over the limits I send the 2nd sample in for comparison  labs can screw up     

[HB of CJ]

Thank you.  Different applications for sure.  We used to do oil changes on various yachts sucking the oil out as there was zero room under the pans.  As the available skinny young kid I was the sucker who had to wiggle down around and beside the mills to change the oil filter

Also the "clean catch"  oil sample was only available during an oil change with the car up on the rack.  High school auto shop way back in 1965.  Has it been that long ago?   We also sent the oil samples to different labs for comparisons.  Donated engines were sometimes dusted.

[windtrader]

OK. I'll bite. What are the best ways to catch a clean oil sample from a DD 2 stroke block?