post oil change stalling/ no start

I'm wondering whether you used a pressurized pump to fill the engine oil, or if you were just adding quart bottles through a funnel. If the former, then note that a metal baffle runs along the underside of the engine valve cover. If you are pumping oil in under pressure, especially if the hose is turned so that it is pointing towards the inverter, then oil might flow along the baffle and enter the PCV hoses that are hidden under the engine wire harness (above cyl. 4).

Also note that the correct engine oil viscosity is 5W-30 and 3.7 quarts will bring you up to the top dimple.

You'll probably need an OBD-II reader compliant with the Toyota CAN to have success retrieving DTC logged by the engine ECU. However this may not retrieve DTC logged by some of the other ECUs.

If you remove the air cleaner housing cover, you can open up the throttle plate by hand (while the car is IG-OFF) and inspect the bottom of the intake manifold for oil accumulation. It is normal to at minimum see some dampness down there.

Good luck with your future hybrid work. We need more techs who care about doing a good job on those vehicles.

 

Follow the PCV system from the valve to the TB. If you add oil *very* quickly, say by using an automated bulk oil system, it's possible to flood the cylinder head with oil.

The excess oil can either flow into the vent system or the PCV system, then into the TB.

I'm pretty careful to *slowly* add every litre of oil, taking my time. Since I service my own equipment, I don't have to worry about shop expenses and can take my time

It's normal to see a small "puddle" of liquid in the Prius intake. It's thought this is gasoline residue due to the Atkinson Cycle operation of the motor

Excess oil will not only coat the TB, will probably get into the MAF hot wires as well. Best to just remove the TB and MAF and clean them with appropriate chemicals; eg *not* with carb cleaner or brake clean

A standard scantool can only interface with legally mandated OBDII codes. To get into the Prius specifics you will require a Toyota scantool

I suggest you subscribe to either All Data or Toyota TechInfo. All the current shop manuals online, including TSB's

As a heads up, never *ever* attempt to bleed the brakes on a Prius without use of the Toyota scantool.

http://priuschat.com/forums/prius-t...em-rear-brakes-no-pressure-when-bleeding.html

http://priuschat.com/forums/attachm...n-bleeding-prius-brake-bleeding-procedure.pdf

Hope this helps. Sorry I had to report bad news

 

As usual, Patrick beat me to it, by mere moments

 

Hi John,

You are right regarding filling the oil filter prior to installation. I also follow this practice, filling the filter 2/3 full prior to installing it. Otherwise, the engine will make funny noises for a few seconds until the lubrication system pressurizes.

I've attached a few photos of the valve cover so you can see the metal baffle mounted to the interior. The second photo shows the corner of the baffle that covers the oil filler opening.

 

John

So, did you ever get to the bottom of how/why the oil ended up in the intake?

I put the oil filter on dry, no issues yet. I slowly add 3 litres of oil. Go into driver seat, right foot on brake pedal, press the start button.

As the motor is unlikely to start if it's still warm, simply floor and release the gas pedal. This tells the ECU to start the gas motor. I let it run until it automatically stops again, then power down

Typically, 3 litres will put the oil level about 2/3 up between the two dots. If I want it right on the top dot, adding another 300-330 ml does it

jay

 

Of course, on my FJ it would be impossible to prefill the oil filter. Not even willing to chance the gawd awful mess to try