Oil Testing Does the oil sample need to be pulled from the very bottom of the sump to capture the metals there?
Chuck S > On 10/16/2020 7:55 AM ja...@jpiworldwide.com wrote: > > > > Hi All, > > > > In a previous life I had to do oil samples on heavy equipment and > aircraft engines (both piston and turbine). Some of these pieces of equipment > or aircraft would run 24/7 so oil samples were taken weekly…(every 100 hours > is a common number for production equipment to be sampled) The oil analysis > would come back from the lab and it would contain information on a variety of > things… the most important thing to the owners and operators of the equipment > was the metal content in the oil. As engines are used (and thus tend to wea) > parts of the engine are “ground off” and wind up in the oil. By analyzing the > metallic content really good analysts could determine exactly what part > inside the engine was breaking down… but usually they were just looking for > the aggregate amount of metal shavings/dust/chips etc. There is usually some > tiny teeny-weeny little bit of metal in the oil (especially on high-hour > engines), but over a certain level or amount of metal , the managers of the > equipment would be concerned and sometimes even take a piece of equipment out > of service and tear the engine down and rebuild it or replace it. > > > > Another thing they did was determine if there was soot or carbon from the > combustion process, water in the oil, fuel, coolant, dust, dirt, or silica. > All of these were indicative of different problems in the engine. Again, most > tests will come back with some small amount of each depending on how infinite > or precise the sample testing is. As an example if there was “dirt” or grit, > sand, silica etc in the oil, this may indicate bad fuel, bad fuel filler > spout, bad fuel cap, air filter(s), or air filter housing or hosing. If the > sample had coolant in it, then they might look at the cylinder heads, or if > there was soot, valves or rings may be the problem… all kinds of things can > be divined from the oil sample if read by a knowledgeable person. > > > > Me- I just took the samples, logged the results, and ate lunch 😊 > > > > JP > > > > From: Tom Buscaglia <t...@sv-alera.com> > Sent: Thursday, October 15, 2020 5:23 PM > To: Stus-List <cnc-list@cnc-list.com> > Subject: Stus-List Re: Engine Hours > > > I never knew about the oil testing. Just ordered a test kit...thanks! > > Tom B > > At 03:26 PM 10/15/2020, you wrote: > > > > > > > This is an interesting, timely and informative thread/discussion. > > We just recently bought another boat with a large Diesel engine.The former > > owner left extensive and detailed documentation. In that documentation are > > the results from engine oil analysis that he performed every year, going > > back 6 years. I’m starting to try and educate myself on this and will > > continue to do the sampling which comes up this November. My initial take > > is that it is important for spotting engine wear/maintenance trends. > > > > Thanks to listers for all the insights. > > > > Regards, > > Dave > > 1982 C&C 37 - Ronin > > > > > > > > > > > > > > On Oct 15, 2020, at 4:18 PM, Josh Muckley <muckl...@gmail.com > > > mailto:muckl...@gmail.com > wrote: > > > > > > I sample my oil and sent for analysis. Costs $20 but the > > > knowledge of whether or not the oil is good as well as what else could be > > > wrong with the engine is invaluable. For anyone who cares about the > > > environmental impacts, not changing the oil is better for the environment > > > too. I use an over-sized oil filter and the very best amsoil marine > > > diesel engine oil. This particular oil has a high TBN of 12. IIRC, TBN > > > stand for total base number, you know base... The opposite of acid. As > > > acids build up in the oil the TBN goes down. If the person doing the > > > analysis sees that the trend suggests the TBN (or any of the oil specs) > > > will be too close to zero before the next oil change, they modify their > > > recommendations. > > > > > > > > > https://drive.google.com/file/d/1MaBnvf4Fc9auz-p_Yw-yp5uh-Z7R4N__/view?usp=drivesdk > > > > > > Keeping moisture out of the oil is another key to long life. > > > A block heater keeps the oil dry, the rings from sticking, the cylinders > > > from rusting and the boat warm enough to prevent the bilge from freezing. > > > > > > Josh Muckley > > > S/V Sea Hawk > > > 1989 C&C 37+ > > > Solomons, MD > > > > > > > > > > > > October is the time to show your appreciation with a small > > contribution to this list to help offset the costs. If you want to support > > the list - use PayPal to send contribution -- > > https://www.paypal.me/stumurray https://www.paypal.me/stumurray%A0 Thanks - > > Stu > > > > > > .¤º°`°º¤,¸¸,¤º°`°º¤¤º°`°º¤,¸¸,¤º°`°º¤. > Tom & Lynn Buscaglia > SV Alera > C&C 37+/40 > Vashon Island WA > (206) 463-9200 > http://www.sv-alera.com/ > > > > October is the time to show your appreciation with a small contribution > to this list to help offset the costs. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu >
October is the time to show your appreciation with a small contribution to this list to help offset the costs. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu
