SINCE MY VOLVO DOES NOT HAVE A PCV VALVE WHAT ELSE IS CAUSING MY FRONT CAMSHAFT OIL SEALS TO LEAK?

ITS A 1995 VOLVO 960 2.9L V6 WAGON.


SINCE MY VOLVO DOES NOT HAVE A PCV VALVE WHAT ELSE IS CAUSING MY FRONT CAMSHAFT OIL SEALS TO LEAK?
that damn oil leak, its common in the 960's ,,,they kinda fixed it in the s90 series. on my 2nd 960 now (a 95 %26amp; 96) could be the cam-shaft cover seal-- there is no seal/gasket might have to use a strong sealant--- could be the oil pan gasket ---could be the oil cap cover---could be the oil cooler---could be the cam-shaft cover screws,,, U need to clean the entire engine put in a leak finder solution which will be a different color and when it leaks U can see exactly where it is coming from and figure how to fix it,,,oh yah i still have parts the whole car (no eng.) need something???heheheSINCE MY VOLVO DOES NOT HAVE A PCV VALVE WHAT ELSE IS CAUSING MY FRONT CAMSHAFT OIL SEALS TO LEAK?
That particular vehicle may not have an actual PCV valve, but it should, by design, have some sort of crankcase ventilation system, which could have a blocked or restricted passage/ orifice somewheres. If yours is a high mileage vehicle, excessive blow-by from worn piston rings will also cause excessive pressure, and cause seals to leak, along with simple old age. The seals become hard and brittle from heat, and in some cases can actually wear a fine groove in the crank/ camshaft where they are supposed to seal ( which may be why even the new seals still leak). If yours is also a turbo engine, some of the pressure from the intake manifold will find it's way into the valve cover/ camshaft area by way of the valve guides.. pushing oil out through the weakened seals. In rare cases, worn camshaft bearings can cause the seals to become elongated/ stretched, which will cause a new seal to leak within a matter of a few thousand miles.
There is also a vacuum hose that attaches to the flame trap housing, make sure this hose is clear, as well as the nipple that it attaches to. There is what they call an oil trap housing under the intake manifold, this can plug up and cause high crankcase pressure too.





The ideal way to address difficult oil leaks is to add a florescent dye to the oil, drive the vehicle for a few miles and then use a black light and this will react (turns bright yellow) with the dye in the oil and you will see where the oil leak is originating from.





Bret


RepairPal.com
Your car has PCV system but Volvo calls it a Flame trap.It is located on the air intake hose and has a plastic screen inside of the housing.Before we continue i need to clarify if the seals u replaced located at the front of engine or is it the rear cam plug and not the front seal behind the cam gear.
Worn seals if you're lucky. Worn cam bearings if you're NOT lucky (maybe)
Age of the vehicle