I am trying to conquer an oil leak that I have had for quite some time. Oil all over the place but mainly on the front of the motor. I have cleaned the front of the motor and have located a drip, see attached video.
The drip is coming off of the rear timing cover. The oil is NOT coming from the cams, they are clean. The oil is NOT coming from the top of the valve cover, though it was covered in oil, this drip was occurring after the valve cover was cleaned and remained cleaned. I am assuming the only other possible location would be around the crankshaft/oil pump. The oil seems to be dripping and then getting on to the timing belt which then throws it everywhere, not to mention all of the other spinning gears on the motor.
The scary part though, it seems my PCV system is clogged. The entire system was replaced when I replaced the head gasket back in December of 2012. I only assume it is clogged because I am again getting the slight smoke out of the dipstick and some positive pressure.
Do the glove test to see if the head has pressure. If you did a head, you can have a cam cover leak. My bet would be on the rear cam seal, but it can be the crank (have never read about a crank seal leak).
Clean it all up, start the car and shut it down quick. The way that is dripping, you should see it pretty fast. You can look behind the cam and see if the seal is out a little.
I have cleaned the motor. The cams, from what I can see by manipulating the rear cover, appear to be clean and not dripping oil, hence the reason I assumed it was crankshaft and not the cams.
Am I correct in calling these the front cam seals in reference to the way the motor sits? You stated it was possibly the rear cam seal, would this be referring to the exhaust/intake (left/right) seals? Just a bit confused.
I cannot remember from doing my head job, but is it possible to remove the rear timing cover (plastic) without removing the belt, cam gears, water pump, etc...to obtain a better view?
I meant the exhaust cam seal. The front of the motor is the side with the timing belt.
You will have to remove everything including the harmonic balancer to get the lower timing belt cover off. If that front exhaust cam seal looks fitted properly, you either have a cam cover leaking or maybe the crank seal (which I doubt).
So I took a gander under the hood today. The cam seals are not protruding out like pictured above. I do have oil on top of the valve cover though after cleaning thoroughly. I will snap a pic tomorrow when I have some light. The odd thing is, I do not think it is coming from the oil cap, I do not see any traces of oil from the cap or on the short stem. Majority of the oil is on the front of the engine (passenger side). If not the oil cap I feel there may only be two explanations, either the oil drip is getting on the belt and gears and flinging upward to meet the hood and drip down on to valve cover and collect or the PCV hose next to oil stem is leaking. I tried the look on the backside of the hood to see if I could find any trace of oil splatter but unfortunately my light was not very good. I am a bit confused and do not have access to a lift that would help tremendously in a diagnosis.
Took the ole S70 to a pick a part to get a seatbelt for $11.00 and ran into some issues. I put some oil in her before we left and hopped on the road, I jumped on the gas to stretch her legs and saw a good puff of smoke, which was new. After all was said and done and I made it home, it appears the Volvo blew the PCV elbow that sits in on top of the valve cover, just to the left of the oil cap. It is no where to be seen and I assume tells me I have a very clogged PCV system. Any opinions?
Unfortunately it does have some positive pressure as well as white smoke. I am looking to do a PCV clean-out this weekend as well as cn90's upgrade to heater hose on the PCV system. Hopefully this will fix my leak or at least slow it down, I am still confused as to where it is coming from but I read that too much pressure from PCV may be pushing oil out front of cams or even the crank. All seals were replaced as well as PCV system back in December 2012 that's why this is a bit confusing to me.
..and be thankful the excess pressure blew off the easiest thing to replace on the engine!!
1999 V70 T5 HPT with stick... 2003 Turbo Beetle Convertible with stick 2002 Eurovan camper slusher 2005 V70 with stick 2006 BMW X3 E83 slusher A fleet of 17 boats and kayaks 3 great teenagers Shepard Husky Shepard Lab Grey cat, ginger cat, black cat My soul mate of 30 years
When you remove the PCV tank and clean out the oil return port (the lower connection where the tank connects to the front face of the engine) attach the length of 5/8" heater hose to this port and try to blow through it. If you can hear bubbling from the sump it isn't blocked, if you can't blow through it the port is still blocked and needs further work to clear it out. Once the port is clear you can then use the 5/8" hose as a larger bypass pipe for the PCV.
In one of your pictures above I can see what appears to be either gasket or cork style seal that looks as round as the oil filler cap, in fact it looks like it has fallen out of the underside of the oil cap so are you 100% sure the oil cap is sealing correctly - Mike