Squealing like a dead cat

Canada Nissan Automotive
1

Okay, so today I fired up the car at school, and it started squealing something fierce. Went away after like 5 seconds.

I assumed it was a belt, so I tightened them all up. Still doing it.

Started tracking down the noise and it sounds like my turbo could be the culprit…

Although before I rip apart my exhaust side of things, I do have a throwout bearing on my clutch that has always squealed, ever since I put in the spec clutch and throwout bearing. The bearing always squealed like crazy too, but only for a fraction of a second before the engine caught, never like this.

Still sounds like it’s coming from the turbo side of things though.

My question is, do turbos squeal like a cat being disembowled when they are on the way out?

2

I hace no idea about the turbo, but I’ve had the clutch on the A/C compressor do that then later it would spark lol, and the bearing in my altenator as well.Maybe check your P/S punp too. Somethings to check. An Altenator is a hell of a lot cheaper than a turbo. Hopefully its something simple.

3

I would check the alternator belt first.

4

all of the belts have been checked, and I don’t have ac. Not a fan issue either. It’s either an alternator, p/s, throwout bearing or turbo.

Alternator puts out constant voltage, p/s seems okay.

The only new thing I’ve discovered is a new noise. it sounds like a high pitched whine, sorta like a supercharger. It gets louder when rev’s increase, irrespective of boost pressure.

The turbo also seems to want to boost sky high. I think it’s stopped caring about its wastegate.

I’m starting to hate this engine.

5

I’ve never heard of a turbo squealing. Maybe scarping or exploding but never sqealing. P/S pump is close to it too

6

I would bet on the alternator. Drive it around for a while and feel (carefully) the back of the alternator. When that bushing starts to fail they squeal and get rather hot. Throwout bearings usually growl and P/S pumps buzz and/or growl when they are about to fail. Just a thought.

7

1st i would check you P/S fluid level.

Then new belts and proper tension.

Then rip apart the tranny AGAIN.
for you it should be a 10 min job.

8

Well I figured it out. It was so effing loud, you couldn’t tell exactly where it was coming from.

Turns out it’s the starter. It’s engaging, spinning the flywheel, but the bendix isn’t pulling the pinion back into the starter. The flywheel is just spinning the starter. Like if you left the car cranking while its running.

On the plus side a starter is cheaper than a turbo. On the downside, I might have to get a new flywheel if it chewed up the ring gear.

Yeah rob, this should take all of 25 mins for me to do now. Might be the 4th time this tranny has been pulled.