[Lincoln88]

working on a 2020 Malibu LT with the 1.5 turbo.

heres the situation, vacuum pump seized, took out the exhaust cam with it,

tore engine down, replaced exhaust cam, timing chain, guides, and tensioner.

reassembled, car didnt want to start right away, had to crank many times, now fires right up after battery is unhooked and reconnected, will idle perfect for a minute or so, then throw an engine light and reduced power message, then starts to stumble and will die without throttle.

codes im getting are

P0011 - Intake camshaft over advanced
P0016 - crank - cam position correlation

i double checked the colored links were on the timing marks before i released the tensioner.

not sure where to go now...

any advice?

 

[campb292]

The vacuum pump seizes from oil starvation caused by sludge or low oil. Metal chunks and shavings tend to spread around the upper engine. You can get lucky or unlucky. Because of the unlucky factor many dealers don't even try and just say new engine needed. Several things to check assuming the chain is correctly installed:

1) VVT solenoid (both)
2) cam position sensor
3) debris blocking PCV orifice
3) cam position actuator (difficult to check)

Since you can get it to start and run for a short time after pulling the negative I'm a little hopeful it is something you can find and fix.

 

[Lincoln88]

The vacuum pump seizes from oil starvation caused by sludge or low oil. Metal chunks and shavings tend to spread around the upper engine. You can get lucky or unlucky. Because of the unlucky factor many dealers don't even try and just say new engine needed. Several things to check assuming the chain is correctly installed:

1) VVT solenoid (both)
2) cam position sensor
3) debris blocking PCV orifice
3) cam position actuator (difficult to check)

Since you can get it to start and run for a short time after pulling the negative I'm a little hopeful it is something you can find and fix.

I replaced both VVT solenoids during the repair.
As far as cam position sensor. I'll try swapping the 2 and see if the code moves with it.

PCV tubes aren't installed yet since they are one time use and I didnt want to install them until I made sure it runs.

I did install new cam actuator on exhaust cam since that's the cam I replaced.

 

[Indy]

heres the situation, vacuum pump seized, took out the exhaust cam with it,

Curious, what was the mileage when the vacuum pump failed?

 

[Lincoln88]

Curious, what was the mileage when the vacuum pump failed?

Around 97k. I got the car non running. (Got it dirt cheap for a 2020)

 

[Indy]

Around 97k. I got the car non running. (Got it dirt cheap for a 2020)

Thanks, just keeping a check on the mileage when the pumps fail. Trying to get an idea when I should change mine to avoid the BIG headache. I have 47,700 miles now on a 2017 Malibu Premier.

 

[campb292]

Thanks, just keeping a check on the mileage when the pumps fail. Trying to get an idea when I should change mine to avoid the BIG headache. I have 47,700 miles now on a 2017 Malibu Premier.

I tracked this also when I started seeing a few popping up a few years ago. I changed mine just before 90,000 miles. Unfortunately it was likely a waste as I had zero sludge and never burn oil. Mine drained nice clean oil and had no starvation at all. Cheap part though and you can't know until you take it off and no sense taking it off without slapping a new one on.

 

[Indy]

Thanks for adding your experience!

 

[Drunken Elvis]

The exhaust cam actuator was replaced, meaning the cam phaser/variable timing sprocket?
If the exhaust camshaft twisted and became far out of phase, I can see this causing damage to the intake cam phaser/variable timing sprocket as well.
I don't know if they can be disassembled and examined but I would look there. You have a code P0011. Check both controlling solenoids for debris stuck in the screens.