blower knock?

Driving earlier on my way home from work, I started hearing a squeaking noise and I wasn't sure of where it was coming from, so I stopped and popped my hood. I didn't find the source of the squeaking there, but I did notice a sound almost like a slight knocking now and then, like something was rattling around or like an old bearing or something and it souded like it was coming from the blower but it was hard to tell.. I put my hand on it and could feel the vibration whenever it made the sound but then again, it could be from anywhere.. any ideas? are there any known problems like this that stem from the blower?

coupler bearing. Mine went out recently on the old M90. Sounded like a rattling can when the car was cold. Got quiet when it warmed up. It's an inexpensive part 25-30 and easy to change. I didn't have to worry about replacement when I switched over to the GV.

Not a bearing. Just called a sc coupler...

yeah that's about what it sounds like.. thanks eric

I don't know if I'd call it an easy job, but it can be done in a few hours. You must remove the alterator and SC snout.

if i drive it like that for like 2 weeks longer could it damage anything? going to wait until I throw an mps on it since the belt will already be off

I drove with mine like that for 2 years (about 50-60k miles). The coupler was only slightly worn, still in good shape. After changing it, there's still some noise, just not as much. With an air intake added, it's normal to hear the "grinding marbles" sound on start-up because the BBV is opened when the engine is cold.

AA wrote:

I drove with mine like that for 2 years (about 50-60k miles). The coupler was only slightly worn, still in good shape. After changing it, there's still some noise, just not as much. With an air intake added, it's normal to hear the "grinding marbles" sound on start-up because the BBV is opened when the engine is cold.

did you notice an increase on boost figures??? with the installation of supercharger couplers??

No. In my case, there was no reason to change it other than the noise. And for the difference it made, I don't know if it was worth the effort.

Ryan, you can double check that it is the coupler by removing the belt and rocking the pulley back. feel for any slack in the rotors.

thanks matt, what is the size and shape to look for for the tensioner pulley bolt? would a serpentine belt tool work on it? i've never even looekd at it

15mm socket and torque it away from you (reverse thread bolt) to loosen the tesnion and slip off the belt.

mine is a T45 or T50.

good deal man

AA wrote:

I don't know if I'd call it an easy job, but it can be done in a few hours. You must remove the alterator and SC snout.

I would gladly trade with you! For the series 1 the entire supercharger has to be removed and taken apart. It is all practice. Once you do enough of them then you can do it in under and hour for the m90, and under 2 hours for a series 1 m62. Look at the bright side, it is the only part in the supercharger that actually needs maintenace every 100k miles.

well when you do replace it hears a link

http://www3.sympatico.ca/aepa/blowerinstall.html

palermocorey90 wrote:

well when you do replace it hears a link

http://www3.sympatico.ca/aepa/blowerinstall.html

using that link, it took me a couple hours max working by myself and never having done anything like it. didnt even have the right tools or a garage.

definitely an easier fix on this car. And good excuse to change out your SC oil.

I think i'm going to end up with more oil on me then I put back in

Just changed my blower oil.. that has to be the worst thing i've ever smelled in my life... anyways, while the hood was popped, I took off the belt and spun th pulley a bit, I was able to move it about half an inch before it seemed to hookup, would that be the play from a broken coupler?

wow 1/2" of play would be the most i've ever heard of for a worn coupler. i'm betting that is where all of the sound is coming from. if you want a hand changing it, let me know

would that broken coupler be affecting performance?

not really, it may cause boost to radically fluctuate coming off throttle, but during acceleration the coupler is still doing its job unless it has completely broken apart (never heard of it)

at wot I do notice t hat it'll flicker in between 6 and 7 a little

They tend to wear and then rattle, instead of actually breaking. It's only about $30 for a new and improved couple from ZZP. Might want to consider changing it since you're working on the SC anyway.

Right right, i'll have to save that project for when I have some time on the weekend