BMW 318i M43TU Engine, Inside the oil filter housing there is a small plastic valve (for want of a better word)it has a small spring, if i push it, it opens to the sump, there is an o ring on this valve thing and this is the source or my oil leak. I need to know what this part is called if just the o ring can be replaced if not how do i replace, so far no workshop manual mentions this part or the oil filter housing. I have a picture if needed Thanks Paul

make sure that the filler cap seal is in place and not gone hard over time also has the rocker cover been off at some stage if it has check that the gasket has not moved the other thing to look out for is that the PCV (breather )valve is in good working order if it is damaged the sump compression will rise and push oil out

1) your engine has worn or damaged valve stem oil seals.
2) valve steam excessively worn
3)plugged drain back holes
4)engine oil being blown ut past the intake manifold gasket
5)punctured automatic transmission modulator diaphragm
6)oil viscosity is too low.
God bless you

Hi Lee, There are two oil pressure relief valves on most vehicles. One is fitted onto the oil pump assembly and another onto the oil filter housing assembly. The oil pump pressure relief valve is located at the front of the engine and is accessed via a blind nut on the side of the unit. The bolt is in the form of a cap, which when removed can be seen to be holding down under tension a spring, which in turn presses the valve. If the pressure becomes too high the valve body is pushed upwards and releases an amount of oil, thereby maintaining the required pressure. The valve built into the oil filter housing works in much the same way, but its job is to allow oil circulation in the event of a blocked oil filter. regards John

REMOVAL

1. Remove front cover.
2. Remove oil filter adapter, pressure regulator valve and spring.

Fig. 16 Oil Pump & Housing

1. Remove oil pump cover attaching screws, then the cover and gears, Fig. 16 .

INSPECTION

1. Check pump cover and housing for cracks, scoring, porous or damaged casting, damaged threads or excessive wear or galling. Replace as required.
2. Check pressure regulator valve for scoring, burrs or sticking in valve bore. Replace as required.
3. Check pressure regulator valve spring for tension loss or bending, replace spring as required.
4. Check gears for chipping galling or excessive wear, replace as required.

Fig. 17 Oil Pump Inner Gear Tip Clearance Inspection

1. Measure oil pump inner gear tip clearance, Fig. 17 . Maximum clearance should be 0.006 inch.

Fig. 18 Oil Pump Outer Gear Diameter Clearance Inspection

1. Measure oil pump outer gear diameter clearance, Fig. 18 . Clearance should be 0.008-0.015 inch.

Fig. 19 Oil Pump Gear End Clearance Inspection

1. Measure oil pump gear end clearance with gear dropped in housing, FIG 19. Clearance should be 0.0010-0.0035 inch.
2. Measure pressure regulator valve for valve to bore clearance of 0.0015-0.003 inch.

INSTALLATION

1. Lubricate all gears with clean motor oil, then install gears in housing.
2. Pack pump cavity with suitable petroleum jelly.
3. Install pump cover and cover attaching screws. Tighten cover attaching screws to specifications.
4. Install pressure regulator valve and spring.
5. Install oil filter adapter using a new gasket, tighten oil filter adapter attaching bolts to specifications.
6. Install front cover on engine. During front cover installation, ensure inner pump gear is properly engaged on crankshaft sprocket.

replace the o-ring that keeps the oil from leaking from the housing to the engine block. A lot of work.

First of all you will need to purchase the paper filter that also comes complete with a small plastic tool. Drain the engine oil as normal until all of the engine oil has drained and put back and tighten the drain plug.Underneath the engine you will see an aluminum housing that has a nut on the very bottom of it and above that a place to fit a large socket wrench ( About 2 inches in diameter) you can purchase this socket at a discount car parts shop. this socket has a 1/2 inch attachment for a socket wrench. First remove the very bottom plug and only a little engine oil will drain as in order to get the rest of the engine oil out you will need that small plastic device that comes with the new oil filter. this plastic tool is what opens up a valve inthe oil filter body to let the rest of the engine oil out of the canister. After all the oil has been removed then use the oil filter canister tool to remove the aluminum body from the engine. With the removal of the body the replacable filter will be inside of the body as it is released from the engine. Note that there will also be 2 o-rings that are part of the filter kit. the large o-ring will be the replacement for the one that is around the thread area on the aluminum bodyn ( To seal the canister to the engine ). The second one is for the small plug that you removed first. After that you will need to refill th engine oil to the correct level. Dont forget to only use SYNTHETIC OIL.

are you sure its not getting hot? those engines came originaly equipped with a water pump that has a plastic impeller. the plastic would crack and be loose on the shaft it would still flow some water but not enough. i would have that checked out. i have changed many of thise pumps on bmw, volkswagon

right at the front in the middle below plastic housing. Has 1 large plastic cap on a metal lower casing, not metal bodied like old oil filters just has filter element. Also replace 'O' rings that should come with the new filter as the old will have squared off or become perished. I think you need a 27mm socket to undo the filer housing.

The oil filter is in a filter housing located on the top of the engine. Take the engine cover off. The 3, 10mm nuts are located under the circular pop-off covers that attach the plastic engine cover. You should see the oil filter housing to the right of the engine valve cover. The oil filter housing is a black, plastic cylinder with a cover that unscrews. The filter is inside of this. Make sure you drain the oil before unscrewing the cover to the filter housing.

try disconnecting the air mass meter sensor if it runs better then ur air mass meter has failed had the same problem