Question about 1995 Pontiac Bonneville
Replaced lower intake gaskets, while doing so I observed puddles of oil on top of lower intake manifold. While installing 2 bolts under plenum I added Permatex #2, new upper intake gaskets and new plenum. Vehicle Still uses a quart after 250 miles. PCV is suspect, since the engine is a 99 but I have re installed all the 95 components. PCV is in a compartment of the plastic plenum, but no external vacuum line is connected... wondering if there should be,, how does PCV vent without external Vacuum line?
The PCV valve gets it's vacuum from the plenum itself. Some 3.8L have different types of connections on the top of the valve (electrical or mechanical), but none have a vacuum line on them.
If you replaced the lower intake gaskets, it is very likely they crushed around the intake bolts. This will cause oil to leak into the intake and pool in the recesses of the lower intake. You are also likely to be leaking anti-freeze.
This is a very common problem with OEM gaskets. After market gaskets made by Fel-Pro have metal rings in them specially to stop this problem. They are available at NAPA and other stores.
Posted on Jun 06, 2009
U need o repair the pcv vacuum source it is the cause of the oil consumption, which is excessive crankcase pressure.
Posted on Mar 12, 2009
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jun 24, 2016 | 2003 Dodge Intrepid
Fig. The location of the valve cover O-rings is shown here
Fig. The valve cover sealant application points
Fig. Location of the guide pins for the intake plenum-3.0L engine
Fig. Intake plenum-to-intake manifold mounting
Fig. The intake manifold bolt locations
May 24, 2011 | 1998 Cadillac Catera
Install the intake manifold bolts and tighten them to 35 ft. lbs. (48 Nm) in the sequence shown.
May 09, 2011 | Chevrolet TrailBlazer Cars & Trucks
Apr 12, 2011 | 1999 Chevrolet Malibu
Feb 04, 2011 | 1997 Oldsmobile Achieva
Fig. 14: View of the intake manifold and related components
Feb 01, 2011 | 1994 Pontiac Grand Am
Jan 23, 2011 | Chevrolet Camaro Cars & Trucks
You will have to remove the intake manifold (this is the solid large plastic cover that covers the top of the engine when you remove the engine cover). There are many wires and small vacuum hoses to disconnect. Plus.., when re-installing, it is a common problem the manifold cracks if excessive torque is applied to the fastening bolts. And you probably should relpace the intake manifold gasket.You can then remove the thermostat assembly by disconnecting the hoses and loosening the mounting screw.
The procedure as per service manual is as follows:----
Following the Service Manual instructions, drain the coolant circuit, then remove the return pipe and the short rubber hose connected to the engine main coolant rail (1 clip at the bottom + 1 clip at the top). You remove also the outlet hose (1 clip at the engine outlet spout + 1 clip at the bottom pipe, you need to loosen the pipe mount to remove the hose). Once removed the return pipe you can undo the coolant rail: 2 (tight) bolts below the rail and the oil dipstick bolt holding the thermostat housing. Doing this without the manifold in place is simple, but its not that easy with the manifold on.... once loosened the coolant rail you can remove the thermostat housing. You open it (3 bolts) and replace the old thermostat with new. All 3 gaskets should be replaced, to minimize the risk of leaks. Apply silicone lubricant on the O-rings, then fit housing + coolant rail back in.
This will help you.Thanks.Helpmech.
Nov 16, 2010 | 2003 Land Rover Freelander
Aug 05, 2010 | 1997 Pontiac Grand Prix
Sep 11, 2009 | 1999 Buick Regal
375 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: