86 audi 4000s - engine oil is oozing out of the oil filt. housing
At a "juncture" in the housing above the oil filter, oil oozes out when the engine is running. If there is a gasket there, I would guess the gasket is shot. My question would be: Is there a gasket there in the housing, which would mean that the housing would come apart at the point?
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to carryout a few tests safely pull out the fuel pump fuse disconnect the coil or coils and remove the plugs so the engine can turn over easy and not start to run. Next when the pump draws oil from the sump it goes through the oil filter then through the block and to the head. So loosen the oil filter just one full turn then crank the engine to see if oil ooze out if it does then pump is good if not the start by the pump. Next fasten the filter and if the engine has a oil pressure switch in the head remove it and crank to see for oil if not then its a possibility when the head gasket was installed it was put down wrong or the wrong gasket thereby covering the oil feed hole from the block to the head
The Audi Q7's filter is located in a housing on the drivers side of the engine, slightly above the Oil pan. To
get to it, raise the Q7, and take off the plastic skid plate that runs
along the transmission. Once that is off you will see the Oil Drain
Bolt. Look to the left of the Oil Pan, and you will see a black cover
with a 36mm, 6 pt. nut on it. Inside there is the oil filter. The Oil
Filter Removal tool can be purchased at either Pep-Boys (which it where
I bought mine), or NAPA (which takes about a day to get).
The oil filter has a rubber gasket attached to the end that comes in contact with the filter housing on the engine. If the filter was screwed on with a dry gasket, or overtightened, the gasket could be damaged and leaking. It could be the filter is not tightened enough.
The oil filter is underneath (you can see it from above though) toward the front of the engine on the left side of the engine. If looking from above, lean over the air cleaner housing (from the left side of the car) and look straight down.
If it is not the suggested gasket that is leaking then it is the oil pressure switch located exactly above the oil filter adapter. The black plastic housing could have developed a crack and oil will ooze downward and drip off the bottom of the adapter. I had this problem and changing the oil pressure switch took care of it.
I wouldn't worry much unless it lasts for more than a few weeks after the next oil change. What you're probably hearing is the valves rattling. This is because of the very low consistency of the oil. I wouldn't recommend 5w20 for any engine personally, as when it is at normal operating temperature it's more like water then oil. I'd simply change the oil again after a couple days and let the new oil feed out any of the 5w20.
If this problem persists, I'd definitely take it to the shop to have checked just some internal damage occured.
On a side note, a good idea for you; get a can of oil treatment such as STP or Valvoline. This can help revive the consistency of the oil and possibly quiet that sound. But, it'll definitely help keep the oil where it should be.