The valve holds the oil in the filter preventing it from running dry when sitting for long periods of time.
The bypass valve in an oil filter allows the oil to bypass the filter if the filter becomes clogged. Some filters also have an anti-drain back valve when the filter is mounted in such a way as the oil could drain out of the filter. This valve prevents the oil from running back into the engine out of the filter which would cause the engine to be started with an empty filter every time.
When you start your car on a very cold day, your oil is quite thick and can't flow thru your filter. Your bypass valve opens up and lets the oil pass by until the engine has warmed up and the oil has thinned out a little. Also, if you haven't changed your oil filter for a long time and it is now completely plugged up, the bypass valve open up to let the oil go thru.
No. The pressure relief valve is part of the pump. The oil filter has a built in bypass valve. It is for if the filter media gets plugged the valve opens and oil still circulates.
oil pressure relief valve is usually located in the oil filter housing as a failsafe for if the oil filter blocks up.
The filter, or filter bypass valve is clogged, replace the filter and then the valve; if the filter replacement does not fix it. (NOTE: Some cars have the bypass filters in the oil filter, others do not)
A bypass oil filter has a valve in it. When the filter media plugs up, the valve open and the oil bypasses the oil filter. It prevents extreme pressure buildup in the oil filter that could blow out the media. Also, many engines use a bypass oil filtration system where only a portion of the oil goes through the filter at any time. All the oil eventually gets filtered.
its in the oil filter housing
On a 1987 Nissan Hardbody Pickup, the PCV valve is located between the alternator and the oil filter. The valve can be seen when the oil filter has been removed.
Some oil filters have a check valve in them. Perhaps you have the wrong filter on the car? Your car may not take the filter with the check valve. Also check to see if someone who did the oil change didn't leave the old oil filter rubber ring on the housing and then installed the new filter on top.
Yes
Behind the oil filter. I went in through the wheel well and had to remove the oil filter.
A little oil will drop into the cup when you remove the used filter. There is a black drain valve under the oil filter cup. You can remove the drain valve cover and let the small amount of oil drain into a cup. Wipe the cup clean before you install the new filter.