To build on Neil's thoughts: diesels typically have an approved lube oil consumption rate - they burn it. So over time the level should go down... Slowly. The GM, QM, and HM series engines (at least) have 2 fatal flaws in the fuel system. -The first and most likely is the lift pump. It is a diaphragm pump the has a drive lever the sticks in the side of the engine block. If the diagram develops a leak then fuel can leak into the oil sump. -The second is the HP fuel pump. Clearances can wear in the pump and leak fuel into the sump. You'll see the sump level increase in both cases and you might smell fuel in the oil. If you put a drop of oil on a paper towel you can observe a halo of fuel develop. The fuel thins the oil potentially damaging the bearings and cylinders. Neglected long enough and accumulating high enough concentrations it might cause a fire or a runaway diesel.
Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Tue, Jul 31, 2018, 7:04 PM schiller via CnC-List <[email protected]> wrote: > I think you are all overthinking this. Most dipsticks have a full to add > range that is nearly a quart of oil. The engine oil pump will work quite > fine as long as the oil level remains above the pump pickup. > > I agree with Dennis. Most dipsticks are mid engine. > > My 2010 Ford Powerstroke Diesel 1 ton is well know to make oil due to the > Diesel Particulate Filter regeneration cycle pumping raw diesel fuel into > the exhaust stroke to burn soot in the filter. It is common for the 16 > quart oil pan to drain up to 24 quarts out. This mostly happens when the > DPF Regeneration cycle is interrupted. It is just something to watch. > > I put so few hours on the engine that I must admit that I don't check it > more than two or three times a year. > > Neil Schiller > 1983 C&C 35-3, #028 > "Grace" > Whitehall, Michigan > WLYC > > On 7/31/2018 5:54 PM, Dennis C. via CnC-List wrote: > > In my opinion, the dipstick rules. On my Universal 25XPB, the dipstick is > located in the center of the block lengthwise. So, dead level, tilted > front up or tilted front down, the dipstick should still read close to the > same. > > On a related note, the manual for my 25XPB specifies the following maximum > angles: > > Installation 14 degrees (tilt up or down) > Rotation 25 degrees > > That implies you could operate the 25XPB at 25 degrees of heel. Remember, > many marine engines are marinized tractor engines. Tractors are designed > to operate on a certain amount of side slope. > > Dennis C. > Touche' 35-1 #83 > Mandeville, LA > > On Tue, Jul 31, 2018 at 4:37 PM, bwhitmore via CnC-List < > [email protected]> wrote: > >> Ok, let's think about this, and I'm asking a question, not disagreeing. >> If one sucks out the oil on an engine at an angle, then there is likely a >> pool of old oil left in the rear of the engine, so you don't get all of it >> out.. Do you add back the full spec amount per the manual, then be >> comfortable that it's right based on the new, presumed correct dipstick >> level? >> >> After all this time, why haven't we been told about this before, or even >> advised of it by folks like Beta who specialize in marine engines? >> >> What is the difference in dipstick readings that we would be looking at? >> >> I've always been told, (and tend to agree) that overfilling oil is worse >> than running at the low end of the full range. >> >> That said my dad had an old jet boat with a gas engine that would take a >> bit to get up on plane, and if the oil wasn't kept really full, the engine >> oil pump would suck air and it would lose oil pressure... >> >> I'm very interested in the owners thoughts on this subject, >> >> Bruce Whitmore >> >> Sent from my Verizon, Samsung Galaxy smartphone >> >> -------- Original message -------- >> From: Marek Dziedzic via CnC-List <[email protected]> >> Date: 7/31/18 2:04 PM (GMT-06:00) >> To: [email protected] >> Cc: Marek Dziedzic <[email protected]> >> Subject: Re: Stus-List Oil pressure and smoke >> >> Keep in mind that most of our inboard engines are mounted at an angle. >> And also most come from a tractor industry, where they were designed to be >> used flat. This means that in many (most?) cases, the dipstick shows an >> incorrect level of oil (usually lower than it should be). You have to find >> out what is the right level on the dipstick in your particular engine. >> Sucking out or draining the oil is certainly one way of figuring this out. >> >> Marek >> >> >> *From:* Della Barba, Joe via CnC-List >> *Sent:* Tuesday, July 31, 2018 09:06 >> *To:* [email protected] >> *Cc:* Della Barba, Joe >> *Subject:* Re: Stus-List Oil pressure and smoke >> >> Check the dipstick and then suck the oil out and see how much you really >> have. >> >> Joe >> Coquina >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- >> https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.paypal.me%2Fstumurray&data=02%7C01%7C%7C8f08f828f9d84c5b0bfb08d5f6e6777c%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636686392056691040&sdata=YQeNkBDgvu9r4zpxU3J3qeg81gpjNqj9MeB4WfAuiZY%3D&reserved=0 >> >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> >> > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
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