Cadillac STS Forum - 2005 through 2012 Discussion, 05 STS V8 Northstar oil leaks in Past Cadillac Vehicle Discussion; update:
I just got mines back from the dealer last week for an oil leak . They replaced (oil manifold ...
Dont ask me why,but I was thinking about your CAM issue.....and I always look for TSB's about twice a year. There are 2 TSB's for the CAM sensors/and or CAM actuators in the STS....some from movement or inproper seals. If you google TSB and go in the NHSTB(or whatever the heck it is) you may just be ablke to get this taken care of.
I found out that my camshaft position actuator oil control valves need replacing be cause they are leaking through the electrical connection at the front of the engine. Do I need to replace the actuators themselves (the circular actuator with teeth that need to be properly aligned) or can I get away with just replacing the oil control valve?
My Northstar engine with 125,000 miles pukes oil out until it drops 1/2 to maybe 1 quart down. Appears to leak from the crankshaft seal and the separator plate.
I put cardboard under it when parked inside my garage.
It's a build result from the Roger Smith era.
That's the reason my normal daily driver as well my wife's car are Toyota products.