Automotive

How Your Engine's Oil System Works

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  • Sep 7th, 2017 4:41 pm
[OP]
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Aug 3, 2014
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Toronto, ON

How Your Engine's Oil System Works

Here’s how the engine oil system works to lubricate the moving parts in your car’s engine. Here I demonstrate it on a 2001 Toyota Corolla 1ZZ-FE VVT-i engine.



Here’s what the oil pump looks like from the outside. Its driven off the crankshaft and takes oil from the pickup tube.
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The oil pump acts like a centrifugal rotatory pump with a built in pressure regulator:
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From the pump the oil heads to the filter. Here I cut an OEM Toyota filter open.
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Paper filter, by pass valve and anti-drain back valve:
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The oil then goes to lubricate the crankshaft, and connecting rods through holes drilled into the crank shaft.
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The connecting rods have a small hole on the outside of the forging that squirts oil onto the piston walls and the connecting rod bushing at the top:

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Next up the oil travels to the head where it lubricates the camshafts and VVT-I gear:
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Here I cut open a camshaft:
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Its actually hollow and easy to cut:

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Finally after making its way through the oil system the oil drains back to the sump. Here I cut the oil pan open:

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And you can see where the drain plug is, slightly higher than the bottom. Thus it’s a good idea to tilt the car back when changing oil.
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And that’s pretty much the basics of engine oil lubrication on a 4 cylinder engine.
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Speedkar99 | YouTube
7 replies
Deal Expert
Jan 15, 2006
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Richmond Hill
Man I know the corolla more intimately than I do my wife! Like I've never seen her insides like this lol
[OP]
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Aug 3, 2014
1251 posts
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Toronto, ON
EP32k2 wrote: Man I know the corolla more intimately than I do my wife! Like I've never seen her insides like this lol
Haha, I like the way you put it! But yes, my exploration of this car gets down to the nitty gritty on the internals and I got a couple more "investigations" to conduct.
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Speedkar99 | YouTube
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Jan 28, 2005
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Scarborough
I love watching these videos, always so informative :)
Deal Addict
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Nov 3, 2012
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Keep up the great videos! Btw awesome corolla convertible.
Deal Guru
Feb 9, 2006
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Brampton
OP I love your videos I happened to be looking for tips on change Toyota Trans fluid and found a slew of your videos.
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Dec 27, 2007
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Edmonton
speedkar9 wrote:
The oil pump acts like a centrifugal rotatory pump with a built in pressure regulator:
I have a problem with this, its not a centrifugal pump as its not a volute/diffuser.

And its also not a "rotatory" pump, I guess its could sort of count as a rotary pump but the proper name would be gerotor.

source: I work with lots of pumps at work
warming up the earth 1 gas fill-up at a time...
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