What are oil passages?
Crankshaft oil passages feed oil from the main-journal bearing to the big-end journal. In its simplest form, the oil passage is a diagonal drilling (Fig. 11.27A) running from the main journal to the big-end journal.
How does oil travel through the engine?
The pump sends the oil up to the main bearings of the crankshaft (in the lower middle), which converts linear energy into rotational energy. From there, the oil moves through oil holes drilled in the crankshaft, to the rod bearings, and then through an oil line to the cylinder head (in the upper middle).
What are the types of oil pumps?
There are two primary types of oil pump used in automotive wet-sump systems: The gear pump and the gear-rotor pump. Most American engines designed prior to the 1990s use gear-type pumps, with two spur-type gears mounted inside an enclosed housing.
How many liters are in a barrel of oil?
1 Liters (L) =. 0.00629 Barrels (Oil) (bbl) Liters : The liter (also written “liter”; SI symbol L or l) is a non-SI metric system unit of volume.
When do you flush out the oil passages?
Flush out the oil passages. Then dry and lubricate as necessary before installation. It is very important for an engine to have adequate (needed) lubrication during the first seconds of operation. A “dry start” (without needed lubrication) of an engine can cause bearing damage.
What happens if the oil pressure drops in a 2.7L?
Combined with the 2.7L’s already narrow oil passages, this condition would lead to a rapid drop in oil pressure and subsequent engine failure. To be clear, the Positive Crankcase Evacuation system does not malfunction, as is the common belief.
When to clean oil passages in crankshafts and engines?
Extra care must be taken after a bearing failure to make sure all the debris and bearing material is removed from the entire engine lubrication system. The crankshaft oil passages must be cleaned. All plugs, orifice dowels, cooling jets and hoses must be removed from the block so the oil passages can be cleaned.
What to do when you get a low oil pressure message?
In some cases, the customer encounters the low oil pressure message and has the oil and filter changed in an effort to correct the symptom. When this fails, the vehicle is often sent to the dealer for further evaluation.
Why does oil pressure look good at ops port?
If the pressure looks good at the OPS port even when hot, it still doesn’t mean that every part of the engine benefits from that pressure. Abused engines can have clogged ports due to sludge accumulation, but random faults like a broken chain tensioner can also provide the raw material for a clog.
What does a low oil pressure light mean?
A low oil pressure message/light is becoming a common complaint on 2007-2016 GM vehicles equipped with a V8 engine and active fuel management (AFM), which is sometimes referred to as displacement on demand (DOD). These symptoms often occur with no indication of a low oil pressure condition such as engine related noises.
How does a high pressure lubrication system work?
Once in the oil rail, the oil is fed to the fuel injector bores through four oil feed galleries drilled and machined in the cylinder head. The high-pressure oil then actuates the fuel injectors.