Dealership overfilled my engine oil

[Whitigir]

Originally Posted by Mikem53

Please enlighten us how over filling crankcase will hydro lock the engine.
I love science fiction.. Read my post again for the real answer and please entertain us with your explanation..

What post are you talking about ? and what answer ? I just want you to teach me that Excessive oil will not get into the combustion chamber, or cause hydro lock.

hydrolock

[Mikem53]

Originally Posted by Whitigir

What post are you talking about ? and what answer ? I just want you to teach me that Excessive oil will not get into the combustion chamber, or cause hydro lock.

hydrolock

I've seen crank seals blow, oil shoot out the dip stick but never knew you could get past the rings from the underside with pistons in the bore.. They use oil squirters that shoot oil to the underside of pistons for cooling..
You seem to be referring to motorcycle engines.. Two stroke maybe with a sealed crankcase..
Fluid in the intake will hydro lock under cyl compression.. But from the underside? Thru the rings? When crankcase pressure have paths out...
I'm not buying it..

[stugray]

Originally Posted by Mikem53

Please enlighten us how over filling crankcase will hydro lock the engine.
I love science fiction.. Read my post again for the real answer and please entertain us with your explanation..

With a boxer engine configuration, if you overfill the oil to the point that it fills behind the pistons, then sitting for too long can cause the oil to leak past the rings into the combustion chambers.

Boxer engines are notorious for doing this after sitting long periods.

I have no idea how much you would have to over-fill the FA20 to have this problem, but race engines with accusumps can have this issue if you forget to close the valve before shutting off the engine.

Not science fiction....

[alex_86]

Originally Posted by Suberman

Windeage tray doesn't stop oil foaming if the sump is too full. It is designed to stop oil starvation from hard cornering by slowing the flow of oil up the side of the sump.

please research prior to spitting out "knowledge".

[mike the snake]

This seems like an accurate statement. Could you please clarify?

Originally Posted by alex_86

please research prior to spitting out "knowledge".

[Suberman]

Originally Posted by alex_86

please research prior to spitting out "knowledge".

What do you want me to research?

A windage tray is a piece of, usually, sheet metal installed, usually, just above the max level of the oil. It is designed to slow the movement of oil under g force. It cannot stop the movement of oil, obviously.

If the sump is overfilled the oil level will be above any windage tray.

In most engines excess oil level leads to crank thrash and consequent foaming. On flat engines if the oil level is much too high it can actually hinder the piston movement with disastrous consequences.

Too much oil is far worse than running an engine at the MIN mark.

[mike the snake]

Agreed.

Not sure what alex 86 meant by his comment.

[jdcorbitt3]

Originally Posted by Whitigir

What post are you talking about ? and what answer ? I just want you to teach me that Excessive oil will not get into the combustion chamber, or cause hydro lock.

hydrolock

This can happen in a 2 cycle engine. Oil and gas go into the crank case and then through ports into the cylinder. 2 cycle engines do not work like 4 cycle engines. You don't pour oil into the crank case of a 2 cycle. You either pre mix it or put it in a resivoir that mixes it with the fuel as needed. You will not hydro lock a 4 cycle engine by overfilling the crank. Hydro locking a 2 cycle is normally due to faulty equipment where the fuel/oil mixture keeps flowing into the crank with the engine off. Then on start it locks.
Sucking water through the intake can hydro lock both 2 and 4 cycle engines, as well as a bad head gasket where water from the water jacket gets into the cylinder.

John

[Suberman]

Originally Posted by jdcorbitt3

This can happen in a 2 cycle engine. Oil and gas go into the crank case and then through ports into the cylinder. 2 cycle engines do not work like 4 cycle engines. You don't pour oil into the crank case of a 2 cycle. You either pre mix it or put it in a resivoir that mixes it with the fuel as needed. You will not hydro lock a 4 cycle engine by overfilling the crank. Hydro locking a 2 cycle is normally due to faulty equipment where the fuel/oil mixture keeps flowing into the crank with the engine off. Then on start it locks.
Sucking water through the intake can hydro lock both 2 and 4 cycle engines, as well as a bad head gasket where water from the water jacket gets into the cylinder.

John

You certainly can hydro lock a four stroke. Both valves close simultaneously in each cylinder every other revolution. Any amount of fluid oil or water on the combustion side of the rings can simply break a rod. Liquids are incompressible and no con rod can be built setting enough.

Intake is carefully located for this reason. Some aftermarket cold sir intakes for some cars fail to do this and engines have been ruined.

If you have an offroader and intend to ford anything deep or at speed you must use an intake snorkel.

Do NOT run your engine with too much oil in the sump. Any engine but particularly a boxer.

[Whitigir]

Thank you suberman for further professional inputs about this.

[mike the snake]

I used to race 1/8 scale offroad radio controlled cars, that used 2-stroke nitro powered engines.

These would easily hydrolock when over primed. We'd use a little pressure to get fuel into the engines to prime them, but if too much fuel got into the engine they'd hydrolock when we tried to start them.

When I ran large scale RC boats, they'd hydrolock when they flipped and got water in the engines if we didn't remove the plugs and get the water out of the engines.

I would say though that the chance of a 4-stroke engine hydrolocking from being overfilled is fairly remote. Yes, oil can get in through bad rings, or valveguides, or water from a blown head gasket, but normally, overfilling the engine with motor oil causes it's own bunch of problems, like whipped oil and blown seals.

Originally Posted by jdcorbitt3

This can happen in a 2 cycle engine. Oil and gas go into the crank case and then through ports into the cylinder. 2 cycle engines do not work like 4 cycle engines. You don't pour oil into the crank case of a 2 cycle. You either pre mix it or put it in a resivoir that mixes it with the fuel as needed. You will not hydro lock a 4 cycle engine by overfilling the crank. Hydro locking a 2 cycle is normally due to faulty equipment where the fuel/oil mixture keeps flowing into the crank with the engine off. Then on start it locks.
Sucking water through the intake can hydro lock both 2 and 4 cycle engines, as well as a bad head gasket where water from the water jacket gets into the cylinder.

John

[stugray]

Originally Posted by mike the snake

overfilling the engine with motor oil causes it's own bunch of problems, like whipped oil and blown seals.

Or in the case of boxer engine, oil leaking into the combustion chambers?
EVERY time you start a boxer you are dealing with the extra oil that leaks past the rings.....

[mike the snake]

Good to know.

Needless to say, I won't ever allow my engine to be overfilled again. I'll be doing my own changes from now on.

[alex_86]

Originally Posted by mike the snake

This seems like an accurate statement. Could you please clarify?

"seems" is the keyword, sir apparently you too are in denial about what you think you know.