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[=TAO=PowerSlave Profile]

It'll be a nice place with those doctor's wages. I bet he even has little miniature guest soaps. I'd take him up on the offer and just steal the guest soap and also maybe the lightbulbs.

It's too bad everybody is going 'green' with these CFL bulbs. In the old days when you stole a lightbulb it burned to hell out of your hand, but that's what made it a challenge.

[Unsobering Profile]

Yes I'm serious. The reason that the oil pump is able to pump oil throughout the engine and valvetrain is via suction and PRESSURE. Oil doesn't go from the oil pan UP through the engine by reverse gravity.

You guys act knowledgeable. I'm surprised this isn't second-nature.

If you have any other questions you need help with, lemme know. I'm here to help.

What are you trying to say? First you said that the oil pan was pressurized. Now you're adding suction to the equation. Are you now saying there is vacuum in the oil pan?

[SavageParrot Profile]

It's too bad everybody is going 'green' with these CFL bulbs. In the old days when you stole a lightbulb it burned to hell out of your hand, but that's what made it a challenge.

That's why the smart people always stole the oven gloves first

[YOOPER]

Backpedal much?

The pressure is coming from the suction of the oilpump moving oil around the engine.

I agree with Unsobering...

You agree that the oil pump is sucking from the pan, right? Gotta suck to pump afterall!! So, how does that create a high pressure within the pan? It just doesn't make sense. The high pressure is on the output side of the pump, not the intake...

[YOOPER]

It'll be a nice place with those doctor's wages. I bet he even has little miniature guest soaps. I'd take him up on the offer and just steal the guest soap and also maybe the lightbulbs.

LOL! My place is 'ok'. Not a shack, not a mansion. We do have a pretty good chunk of land though - and no neighbors. Sooo, you can pretty much do anything you want 'in the backyard' and not have any worries.

I do have plenty of CFL's throughout the house... A couple lights are LED's, and there's one spot in the barn that has those big sodium-vapor lights. The LED's are cool, though...I think that's the way to go. No worry about mercury like the CFL's.

And I'm all out of the miniature guest soaps. Seems someone stole them all last time I had friends over...

[B]

http://www.aa1car.com/library/2005/us020516.htm

[Unsobering Profile]

Backpedal much?

The pressure is coming from the suction of the oilpump moving oil around the engine.

Okay so know you're saying the pressure is created by vacuum?

Sorry. I'm trying to be nice here, but you don't have a clue as to what you're talking about.

Suction (vacuum) would be the exact opposite of pressure.

[Unsobering Profile]

I don't want you to be nice. I want you to say something that backs up what you've already said. I want you to say something that says I'm wrong. I'm not wrong. I'm right.

The fins on the oil pump work to create both a suction and a pressure effect, sucking up oil from the pan and delivering it around the engine. I've already said this, 'though. Don't really think I should be saying it again.

I don't know why you seem to think oil pumps are mounted in the bottom of the oil pan. They are not.

I never said the oil pump was in the bottom of the pan. They have a pickup tube that runs from the oil pump down to the bottom of the pan.

Have you ever had a engine apart? Have you ever had an oil pump in your hand?

Let's get back to the original statement you made about the oil pan being pressurized...They are not pressurized. There is suction in the bottom of the pan from the oil pump. This is not pressure. It's vacuum.

I'll try and put it in a way that you'll understand...

So let's say you goto mcdonalds and order a happy meal with your apple juice drink box. When you're sipping on the straw you're using vacuum to suck the apple juice out of the box. The box collapses as it get's empty. Not from pressure inside the box.

[NOBBY (NL) Profile Website]

Just to add some oil to the fire, it isn't vacuum it is displacement

[YOOPER]

The thing about oil drain plugs is that there is a lot of oil pressure and if you don't have it tight enough it will leak. Just snug isn't gonna get it done.

No, that's wrong.

Let's get back to the original statement you made about the oil pan being pressurized...They are not pressurized. There is suction in the bottom of the pan from the oil pump. This is not pressure. It's vacuum.

Bingo.

Hence the need for oil drain plugs to be only 20-30 ft-lbs of torque. They're not holding back pressure, just gravity.

If your drain plug is leaking, its because the plug itself (threads, etc) are messed up...not because of the oil pump "pushing" oil out.

[NOBBY (NL) Profile Website]

For the ones that are interested how it works, maybe [color="DeepSkyBlue"]this[/color] helps.

[Unsobering Profile]

LOL Why risk stripping the threads on the plug by tightening to 30lbs and possibly wrecking the threads? Why not just 14lbs like what's standard on a valve cover bolt?

If it's only gravity pushing down, then tighten yours down to only 5 lbs and see if it doesn't leak after you starting driving and not while engine is off. It shouldn't if what you're saying is true, but it will.

If what you're saying is true, then all this talk about oil pressure is hogwash. There isn't any oil pressure in an engine. That's hilarious.

There is oil pressure. The oil pump pushes oil through the oil galleys under pressure. Typically between 40-80 psi. This is used to push the oil up through the passages through the block, the passages lead to various places within the block that need to be lubricated.

Oil is pumped through the main bearings where it enters another passage through the crank that goes to the rod bearings. From there the oil basicly drips back into the pan. The oil is also pushed to the top side of the engine block where it would lubricate things like the cam bearings, lifters, rocker arms and so on. After that it runs back down through the oil passages back to the pan, but by gravity not pressure.


Think of it this way...You're using a garden hose to fill a kiddie pool. The water coming out of the hose is under pressure, but not the water in the pool.

[NOBBY (NL) Profile Website]

[color="DeepSkyBlue"]The lubrication system in cars[/color]

[NOBBY (NL) Profile Website]

I think you have to watch it again until you understand how it works.

[Assimilator Profile]