I agree on the intake bolts weeping oil around the threads. GM Telflon or any other white Teflon paste will cure that. Yes the rear main bridge holes should be blind. However many have been cracked by using a bolt that is a little to long. Again Teflon paste is the cure. I also noticed that not all oil pans completely cover the rear main bridge bolt openings which can lead to leaks. I have found success by gluing the gasket to the block with a thin (1/8") bead of weather strip adhesive. Also add RTV in the bridge bolt hole openings (on top of the bolt heads) and at the timing chain junction. RTV (1/8" bead on both sides of the windage tray. RTV on the pan itself. Tighten with a nut driver or 1/4 ratchet. it doesn't take much. Watch the gaskets. If they start to push outward, STOP, you are tight enough. This method will NOT leak. Any leaks will be from other areas. In fact you could probably remove the pan bolts and it would stay. The only reason to even use a gasket with this method is for disassembly. Pure RTV is tough to pull apart. I use Ultra Grey sealer.
Doug
Doug
