Whining noise? I'm stumped.
 

Lq9 motor, with TKO600, New clutch and hydraulic throwout bearing.

Put it all together and started hearing a whining noise. It is loudest when idling.

I took off the serpentine belt, still had the noise.
I replaced the throw out bearing and noise with first test run. I also took out a spacer for the throwout bearing.

I push in the clutch still makes the noise?

pilot bearing looked fine?

I'm Stumped!

Whining as in a squeeling noise? If so I had the same problem and it ended up being the pilot bearing.

Maybe you could let it idle in gear on jackstands to see if the noise goes away. Good way to isolate the pilot bearing.

just in neutral with the clutch engaged the pilot bearing doesn't spin free. it only spins when the clutch is disengaged.

More like a squeeling noise
 

Thinking out loud and with all of your input, I think it must be the pilot bearing. It was new when I did the swap.
After I replaced my throwout bearing I put a little grease on the end of the transmission shaft. I believe it quieted down the pilot but the noise is coming back.
The tranny is coming back out :)

I'm not sure what I did to damage it? I used a heavy duty one but not sure of the name. I had to damage it on the install.

Hey did I mention the car rip's!!! It's a LQ9 I bought from Jody with his mods, heads, cam, etc. I put it into my 69 firebird. Fun as heck to drive and it just rip's!!1:thumbsup:

I don't remember seeing any dyno numbers................ ;) It should make 525+ crank hp, so maybe 420-450 rwhp, maybe a bit more depending on dyno type. I felt it was a great motor for me on a track car, especially being a fairly low dollar effort. I hope you're happy with it.

Chased down a 'whistling' noise in a motor install for a buddy..... after they'd put in a new GM grate engine. He hadn't hooked up the PCV on one of those SBC with the retro looking EFI Chevrolet put out.... and at idle the thing had a horrible whistling sound. They'd even gone so far as to take the tranny out TWICE.... and all it (the vacuum connection on the motor) needed was a simple hose. :D

I haven't got it dyno'd yet. I took it to synergy to get dyno'd but my car needed some work and I had a new clutch. They put a tune on it and gave me a list of things to get completed.
I need to break in the clutch and then take it back for the dyno tune. I completed the list. Now the car runs good.
I didn't pack my pilot bearing with grease when I first put it in. It started squealing right after I got back from getting it tuned. I drove it and the squealing began.
Thinking it was the throwout, I took it apart and put a little white lithium grease on the trans shaft end. I then drove it and the noise stopped but started to return just not as loud. Hardly drove it, just around the block and 2 mile around town loop. Almost every time I took off the car just wants to burn out!!!!!!!:thumbsup:
My gut feeling tells me it's the pilot.

I can't work on until it wednesday due to work.:(

Every time I go out in the garage mine makes a whining noise also and the car is still on blocks and never been started. I believe the noise is originating somewhere from deep within my belly!:cheers:

or its the wife.......:rofl:

I wish it was a simple hose :lol: .

I should have listened
 

You are 100% correct!!! I didn't follow your knowledge when I should have. Took the tranny out 3 times total. Girl friend hates me right now. And I've lost some sleep over this.

This will never happen again if you are kind enough to respond to another post I make. Thank You very much!!!!:thumbsup:

Dennis

you serious, there was a hose off?

No there wasn't a hose off. As soon as I open the drain to the catch can the sound when away. I also drained the oil.

I have my valve cover vent hose going to the top of the catch can. The other hose goes to the intake behind the DBW. I did not use any hose clamps.

I just read the directions from the catch can site.:thumbsup:

Did I mention how much my car rips!!!! I can't imagine after the dyno.

Glad you found it.... :cheers:

the head/cam combo should make very good power. :unibrow:

This is my engine noise!!!!
 

https://www.youtube.com/watch?v=wj-gg...e_gdata_player

I'm still not sure how to resolve it. I put a PCV after the the catch can and it helped but still get the noise at idle. I put the PCV before the catch can and it was just as loud. Also Im using a PCV that is not specific to my LQ9.

Jody or GregWeld any direction from either of you would be great!

You answered your own question the minute you took the cap off the valve cover/breather -- and heard that sucking sound.

In order for a PCV to work -- it needs to have INTAKE air.... AKA : A breather

Sounds to me like you have no intake (make up) air.

I have those carbon fiber valve covers and they have the cap to fill with oil on the drivers side. The passenger side has the PCV nipple or opening. Are you saying vent the valve cover?
Thank you for a fast reply that was cool !:thumbsup:
Vent the intake!Just reread your post.

That was not my motor, just one I found on you tube with the same noise. Mine responds the same way when I pull a hose from my catch can. Here is a pic of my set up. LQ9 with catch can. Can I tee in to the line giong to the catch can and put a breather?

Okay - but still the same -- if the noise goes away when you disconnect the pcv hose.... then the noise you're hearing is the engine trying to suck air in "somewhere" wherever it can get it from!

A pcv is nothing more than a "controlled vacuum leak" --- It's VACUUM --- but has to have a corresponding air intake somewhere.... or it's just going to create vacuum until it pulls thru somewhere. Thus the whistling.

I don't know where on an LS engine the breather side of that PCV is or I'd tell ya where to look.

Maybe a quickie google search or some one that's familiar with this engines will chime in.

I thank you for your reply! I have got a lot of info but nothing that is exactly like my set up. The carbon fiber valve covers only have the nipple for the PCV on one side (passengers) the other side just has the cap for oil. I'll try to search more. Thanks again.:thumbsup:

I thank you for your reply! I have got a lot of info but nothing that is exactly like my set up. The carbon fiber valve covers only have the nipple for the PCV on one side (passengers) the other side (driver) the cap for oil. I'll try to search more. Thanks again.:thumbsup:

I was going to do it the stock way, with the catch can plumbed to the plate under the intake and the outlet to the throttle body (vacuum), and the nipple on the valve cover either running to the air inlet tube or possibly a small K&N filter for filtered fresh air to make the system work correctly.

Jody -- Where's the breather on these motors??

Seems to me - just like in an old skool motor - that there needs to be somewhere for filtered fresh air to enter the crankcase (old skool would be the valve cover the opposite side of the PCV).

I get that the LS motors don't run that old skool breather in the V/C but there has to be make up air from somewhere???

I'm not sure on all LS, but the majority have the top block plate under the intake with a baffled nipple fitting, and a hose that runs from there to the vacuum port of the throttle body. On the valve cover there is another nipple that runs to the inlet tube between the throttle body and the maf, or directly to the throttle body to a non-vacuum port in front of the throttle blade. That is where the engine pulls the air into the system, and air from there is already filtered by the air filter and metered by the maf, and accounted for. You could also run the tube from the valve cover to the air filter box, or just have a K&N filter on the end of the hose, but now you're putting un-metered air into the system if you still have the maf. Not a big issue though (other than smog legality), but it does change the tune somewhat, and should be re-tuned for it. If it's running speed density (no maf) it's not an issue.

This is why I'm having some challenge. My valley cover does not have the nipple for the metered air.(99% sure ,at work right now). Is there another approach?
I just looked at a pic of my motor and the valley cover does not have the nipple. I'm back to asking is there another way to vent it?

yes, either replace the cover with a stock unit that has one (my first choice), drill and tap the cover for a nipple, or put one in the other valve cover ( my last choice with those beautiful covers! :D ).

You have the oil separator so the fact there's no baffling in the cover should be fine. Wonder where the LQ9 drew the pressure from? I think it had a fitting on the intake itself now that I think about it. I had not got that far with that motor, or I would have fixed it before you got it.

Will a ls6 04-06 valley cover work? Would I have to grind the block?

This discussion has gone from whining noise to nipples........I like it but it desperately needs pictures now..........

I'd like to take a look at your setup. Can't we just add a breather style cap?

yeah, if you can convince him to drill a hole in his nice expensive carbon fiber valve covers. :unibrow:

If it already has an oil fill cap -- I'd try to convert that to a breather.

as I remember it's a nice black billet screw in cap with the threaded part epoxied into the cover. I would just pick up a stock LS2 block cover and swap it. Intake is easy to remove, no water or distributor to deal with.

Jody -- as a Mod -- maybe you could fix the title of this thread.... LOL

pick a title Greg. :yes:

How about just changing "nose" to "noise"??

:lol: just making sure you were staying sharp my friend.

Glad my noise can create some humor! :D

Greg, you are really taking this new assistant(To Gordon) moderating job to heart. :lol: