Do you have a timing belt or a timing chain? Big difference. Chains are ‘life of the car’ items, belts aren’t.
A 2000 Corolla has a chain.
With timely oil changes and moderate driving it will eventually stretch and start to make noise somewhere past 200k miles.
In the mean time, leave it alone.
wait, I thought timing chains were supposed to be replaced every 100k miles?
Timing BELTS - yes…NOT timing chains. For most people timing chains last the life of the engine. But if you keep your vehicles for more then 300k miles then you’ll probably have to replace a timing chain. The nice thing about a timing chain is they start to make noise before they break.
You’re getting confused with a Timing Chain (made of steel and is lubricated with engine oil) and a timing Belt (which is made of rubber with reinforced fiberglass or kevlar and is a dry system). They both do the same job of keeping piston and valves in sync as the engine rotates.
Timing belts need to be replaced about every 100k miles. Most people prefer chains because most people don’t ever replace them for the time they own them. Since you have/should replace a timing belt every 100k - it’s a costly expense most people would rather not pay (usually north of $500).
@circuitsmith–yes, the old Chevrolet Stovebolt 6 did have an oil pump. I am almost certain that the Model A Ford, though splash lubricated, had an oil pump to supply oil to the main bearings and camshaft bearings. My guess is that this was also the arrangement on the Hudsons with the splash lubrication. Somehow, oil had to be supplied to the crankshaft and camshaft bearings.
I do remember the old timers referring to the oil pan of an engine as the splash pan.
And that is why I wanted the OP to answer the question.
Water pumps are different than oil pumps. They have a mechanical seal that keeps the coolant out of the bearings and when that seal fails, the bearings follow.
Oil pumps have no seals, they are inside the oil pan and any oil that leaks out of the shaft just goes right back into the oil pan, besides, that shaft needs lubrication too.
Hmmm. My Briggs snow blower is OHV but has a slinger on the rod for lubrication. It has no oil pump that I can find anywhere in the parts list. So I wonder how the rockers get lubed? Maybe its all plastic and no lube required or something.
The oil pump in my '88 Accord was on the side of the engine, driven by the timing belt.
It had a seal that eventually started to leak oil onto the timing belt, so at ~210k miles the pump was replaced along with the belt.
Pumps are not inside the pan. They need to be driven, typically by the timing chain or belt. Mine has its own little chain. Only the pickup tube is inside the pan.
Bing January 10 Hmmm. My Briggs snow blower is OHV but has a slinger on the rod for lubrication. It has no oil pump that I can find anywhere in the parts list. So I wonder how the rockers get lubed? Maybe its all plastic and no lube required or something.
There’s probably enough oil mist or fog inside the engine that the rockers stay oily. These aren’t extremely stressed engines, you can push a valve spring open with your thumb. It may be possible that the pcv vents from the valve cover, every time the piston goes down, it pressurizes the crankcase just like a two stroke and that likely pushes some oil mist along with air up to the head area.
Dunno how Briggs does it, but Honda uses a cam belt that delivers the oil to the valves as a result of its motion in use.
the same mountainbike January 11 Pumps are not inside the pan. They need to be driven, typically by the timing chain or belt. Mine has its own little chain. Only the pickup tube is inside the pan.
Well, they aren’t submerged in the oil, but they are in a place where any oil that leaks out falls back into the pan. Crankcase might have been a better term. On most pushrod engines, they are driven by the distributor drive gear.
On a Kawasaki ZRX1200 motorcycle engine, the oil pump is driven off the clutch and is in the transmission area. This engine actually uses two oil pumps, one to feed the bearings, and another to pump oil out of the bottom of the crankcase so the crankshaft doesn’t hit the oil. It’s actually a semi dry sump engine with the bottom of the crankshaft lower than the oil level of the oil sump. The crankcase being its own separate cavity.
On my GM 3800’s the pump was behind the timing cover. Can’t remember anymore if t was on the crank or run by the timing chain, but not in the pan for sure and no distributor anymore.
That’s true, BLE.
I wonder if in the quest to squeeze an extra .0001 mpg oil pumps will go electric like other fluid pumps have.