So I have been beating my head against the wall on this one. I have a 1988 325i Convertible with 194k miles.
I have searched R3vlimited.com, e30tech.com, and socale30.com, and come up with no real answer/solution to my issue.
I have a considerable amount of oil in the intake track. I understand it's normal to have a little bit of oil in the intake manifold, but this is causing the spark plugs and O2 sensor to foul in less than 100 miles. There is enough oil that it's running down the whole intake track and ruining the air filter. It appears to be coming from the valve cover vent tube that goes to the throttle body. All of this is causing the DME to throw an O2 sensor code, and it also blows white smoke from the tail pipe that smells completely like oil, not coolant.
**This only started happening right after the following work was performed.
Recent work:
I am going to be installing an air/oil separator, that is normally used for forced induction engines, tomorrow in hopes of holding off the destruction of my engine till a definite answer is established, and I have a set goal to work towards.
So there it is, any useful or positive help would be greatly appreciated.
I have searched R3vlimited.com, e30tech.com, and socale30.com, and come up with no real answer/solution to my issue.
I have a considerable amount of oil in the intake track. I understand it's normal to have a little bit of oil in the intake manifold, but this is causing the spark plugs and O2 sensor to foul in less than 100 miles. There is enough oil that it's running down the whole intake track and ruining the air filter. It appears to be coming from the valve cover vent tube that goes to the throttle body. All of this is causing the DME to throw an O2 sensor code, and it also blows white smoke from the tail pipe that smells completely like oil, not coolant.
**This only started happening right after the following work was performed.
Recent work:
- Timing belt kit
- Water pump
- Thermostat housing
- Radiator
- Cooling Hoses
- Belts
- Head gasket
- Oil tube and seals from the block to the intake manifold
- Vacuum lines (including the valve cover to throttle body line)
- Throttle body gasket
- Intake manifold gaskets
- Oil pan gasket
- Valve cover gasket kit
- Adjusted the valves.
- New dipstick O-rings
I am going to be installing an air/oil separator, that is normally used for forced induction engines, tomorrow in hopes of holding off the destruction of my engine till a definite answer is established, and I have a set goal to work towards.
- I re-seated the tube from the block to the intake manifold based on multiple posts on the boards, but that was not it. It's seated properly and with new seals.
- Checked all the torque on the head bolts and they were all were within 3# (+/-) of each other. (If I have already blown the head gasket, then it seems like I would have other issues as well, though anything is probable at this point.)
- I have vacuum in the engine when I pull the oil cap and put my hand over it.
- Dipstick is seated properly, though it was never removed from the engine
So there it is, any useful or positive help would be greatly appreciated.
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