new engine started up, weird noise from flywheel area.

Howdy first post here. :D I have a 1968 Chevy c20. I just put in a new 350/350 crate motor. It started (with a little help and info from your forum). :cool: I am stopping the clacking noise from the valves right now. It has a timing gears and is super noisy. As I am getting rid of the valve clacking noises, I heard this noise coming from the bottom of the flywheel area. It's clicking and clacking. Loud noise but coming from the small pan under the flywheel. (I used a hose up to my ear to find where the noise was coming from.) I had the 4spd granny trans rebuilt and it seems to work fine, just this horrible noise. It has a new clutch. When I push in the clutch or engage the gears it all works fine. The noise gets worse if it's in neutral. The noise is not bad if it's in gear going down the street. Clutch adjustment? Not sure what else it could be? Something put together wrong? Help? ?:CRY: :confused:

Throw out bearing in backwards? or maybe just shot. Be my first thought.

Not sure what it is. How can I tell if it's in backwards? Or just shot?

The noise is present when it's in neutral also. Wouldn't the noise happen only when you applied the clutch pedal?

if the bearing was in backwards, shouldn't make a noise unless you was mashing the clutch. make sure the flywheel is not hitting the dust cover. make sure the throw out bearing is not turning all of the time. in neutral. and going down the road it shouldn't be turning. make sure the starter is completely disengaged.:HMMM:

I may be way off on this one, but it sounds like the pilot shaft might have galled roller bearings internally.
I have to wonder why, with a new engine you went gear drive. I have had them and I do not like them at all. Just my feeling.
My other thought might be a loose flywheel at the hub. However, when I had one, it had more of a feel through the pedal rather than audible.
After all that work, that must be very frustrating. I just spent two days diagnosing a missplaced spark plug wire. After all the engines I have built, cars I have restored, rods I have built, I had two plugs off on the cap. It is a big block, and I have not had a big block for years.
Like Duh!!!!
I hope your fix is that simple.

Not necessarily. A bad throw out bearing could and most times will make noise all the time. Sometimes worse when the pedal is mashed, sometimes not. Making sure the starter is disengaged is a pretty good on also. One that was in backwards can make constant noises also. Learned that one the hard way as a youngster. Although not always. Like has been said though. I'd shut 'er down and remove the dust cover and see if you can see any fresh marks anywhere. Use some safety glasses and turn the motor by hand and look, if you don't see anything I would probably lean towards the bearing, but this is also a guess based on online info. It's hard to troubleshoot online or over the phone. I can't really hear what the noise sounds like, but these are a few things that it could be.

Quote:

---

Originally posted by urotu
Not necessarily. A bad throw out bearing could and most times will make noise all the time. Sometimes worse when the pedal is mashed, sometimes not. Making sure the starter is disengaged is a pretty good on also. One that was in backwards can make constant noises also. Learned that one the hard way as a youngster. Although not always. Like has been said though. I'd shut 'er down and remove the dust cover and see if you can see any fresh marks anywhere. Use some safety glasses and turn the motor by hand and look, if you don't see anything I would probably lean towards the bearing, but this is also a guess based on online info. It's hard to troubleshoot online or over the phone. I can't really hear what the noise sounds like, but these are a few things that it could be.

---

urotu, if you have the throw out bearing adj. properly it wouldn't be turning at all in neutral, that's based on a few 100 clutch and pp installations ive done over the years. :HMMM:

Thanks for the help everyone. I'm so fricking close on finishing this. I knew it wasn't going to be simple. I'll pull the cover off in the morning. I would like to think I didn't put it in backwards. When I push in the pedal it makes a slightly louder (more pronounced) noise. Sounds like a muffled valve noise, clickity clack, very fast. I am kind of slow...so... what is it when the starter is not completely disengaged? As for the gear drive...It is not for the performance. I just like the sick whinny noise and it pisses people off sometimes. All the better! ;)

Lt1s10...how would I adjust it properly? I like this site. It's like having my dad help me (he passed away 10 years ago.) Thanks!

Quote:

---

Originally posted by pmjan
Lt1s10 work with...how would I adjust it properly? I like this site. It's like having my dad help me (he passed away 10 years ago.) Thanks!

---

sorry to heare about your dad, glade to help if i can, but im assuming you have a manuel linkage to work with, go down to where the throwout bearing folk comes out of the bellhousen and where the clutch rod meets the fork and spread them apart, should have about 1/16 to 1/8 of an inch gap between them, if not adj. it. if you have anything dif than this let me know.
read this other stread and see if you see anything. you dont want your bearing turning all of the time, its not made to run that much.

http://www.clubhotrod.com/forums/t12...-&pagenumber=1:HMMM:

Hope you checked the flywheel pilot bearing/bushing.

Quote:

---

Originally posted by lt1s10
make sure the starter is completely disengaged.:HMMM:

---

I had this prob on my 350, it turned out that the starter gear was hitting the flywheel. Took off starter and the spring that pushes the starter was wore out and the gear was moving very easily back and forth. May not be your problem, but it has been my experience.

Quote:

---

Originally posted by lt1s10
urotu, if you have the throw out bearing adj. properly it wouldn't be turning at all in neutral, that's based on a few 100 clutch and pp installations ive done over the years. :HMMM:

---

lt1s10 based on the few 100 clutches I have done over the years, including mediu and heavy duty I can tell you from experience that a throw out bearing can and will make noise in nuetral, in gear, with the clutch in, with the clutch out, you name it. Just because the transmissio is not in gear does not mean that the clutch parts quit working. The clutch plates are what engage and disengage to make your car move. Now, in theory, you are correct, if the bearing is in adjustment it should not be turning, in my experience there are very few people who adjust there clutches properly, especially since the introduction of the hydraulic clutch and most folks don't have to worry about it anymore, so most folks don't know how to adjust a manual clutch anymore, much less a throwout bearing. Now all this being said, what do you think the clutch parts do when you engage and disengage the clutch with the car in nuetral, they do exactly the same thing that they do when you have it in gear. So this being said, you bet the throwout bearings can and will make noise in nuetral.

I'm sorry If I made a quick diagnosis that you didn't like, but was making an online diagnosis based on the little info that was provided, just like you. This sounded like one of the more reasonable things to look at. I never asked if the noise changes with the rpm of the engine, does it?

Ok, had two games of little league for the kids now I can play. I took her up and pulled the bottom flywheel cover. The starter was not engaged all the time and I saw no visable worn, scratch marks etc. on anything. Looked the same when I put it in. The throwout bearing is in right. Whew! The flimsy piece of metal that goes on the bottom engine facing side of the flywheel is shaking like a banshie making the noise. It looks like something is hitting it as the flywheel turns. The metal cover looks straight and all of the screws are in. I'm pulling the starter and am going to try to see what is hitting it. Any ideas as to what would hit it? What did I put together wrong? Lt1s10- I have the proper gap on the linkage...I'd like to say that I did it that way on purpose but....
The noise changes witht he RPM's, something is hitting on the front metal sheet. I'll check the metal first then....

Yes!!!!!!!!! It was the metal. It looked straight because it was it was, it was just "off" about 1/8 on an inch and was being hit. I used the high tech tool know as, the long screw driver and fixed it in about one minute. I can't believe the noise that was coming from that little bit of rubbing. It sounded so expensive. I want to thank everyone for there help. Not kiddin. If I wouldn't have got online with you guys, I would have taken her in. I have know one to ask, so thank you again!

Quote:

---

Originally posted by lt1s10
urotu, if you have the throw out bearing adj. properly it wouldn't be turning at all in neutral, that's based on a few 100 clutch and pp installations ive done over the years. :HMMM:

---

uroyu, you are not reading my post. i said if the clutch was adj. properly it wouldnt be turning in nuetral. if i had of worked on the throwout bearing it wouldnt be turning in neutral or going down the road either unless i had my foot on the pedal.
:HMMM:

pmjan, congrats man. I should have asked if the noise changed with rpm's to begin with, that's a standard question, my fault. That would have led us in a completely different direction, which it appears you have already taken. I'm glad it was something easy, always nice.

Quote:

---

Originally posted by lt1s10
uroyu, you are not reading my post. i said if the clutch was adj. properly it wouldnt be turning in nuetral. if i had of worked on the throwout bearing it wouldnt be turning in neutral or going down the road either unless i had my foot on the pedal.
:HMMM:

---

lt1s10, look man, it's all good. I'm really not tryin' to start a fuss. I enjoy reading your post and have read some very informative info from you. I have read your post a number of times and I understand what you are trying to say. All I am trying to say is that there is a difference in theory and real world diagnosis. When your manual tranny is in nuetral it has nothing to do with the throwout bearing or the clutch for that matter that the car does not move. The tranny is not in gear. With the clutch engaged, even in nuetral, the clutch is engaged, period. Yes, the throwout bearing should not be moving with the pedal up, or the clutch engaged, it should only be noisy when you engage the pedal, or disengage the clutch. This being said, a bad bearing will get worse and worse until they squall most of the time or until you replace it.

I really am not trying to be a butthole and hope you don't think of me as one. If it wasn't for you I would still think TH400's used vacuum for kickdown, or detent, whichever you prefer. I understand where you were going with the clutch and throwout, but I have heard throwout bearings that made noise constantly. Generally with folks who have little to no experience with vehicles and will let them go until they die completely, but constant noise none the less. Nerver heard one change noise with rpm's though, but I guess anything is possible.

Again, I hope I haven't over stepped my bounds here, and I truly mean no disrespect, but I am no rookie to cars. I do hope you are feeling better and it is great to see you back on the board.

By the way, I am Derek, you don't have to call me urotu.

Derek

god I love this board

IT IS GREAT IS'NT IT FIREBIRD

not sure 383, but i think firebird was making a little joke. but you are right.

derek we are saying the same thing I think, all I'm saying is if the throw out bearing is adj. properly it want be turning unless your foot was on the pedal, because when you adj. it properly it wont be touching anything to make it turn. foot on the pedal throw out bearing turns, foot off of pedal throw out bearing don't turn. if it was adj properly and froze up you wouldn't know it until you put you foot on the pedal because it wouldn't be touching anything to make it turn so it couldn't make a noise. if the bearing is turning without foot on pedal then its out of adj. has nothing to do with which gear you are in, but if you are mashing the clutch padel or not. if thats what you said then we agree. :HMMM: :LOL:

Nope, not a joke. Cool board, lot's of helpful people and info. It's not like a lot of boards with a bunch of B.S. Like the other post where I basically say Gordon sucks I'd be get death threats etc.

Quote:

---

Originally posted by firebird45331
Nope, not a joke. Cool board, lot's of helpful people and info. It's not like a lot of boards with a bunch of B.S. Like the other post where I basically say Gordon sucks I'd be get death threats etc.

---

damn, i must be slipping. that sounds like something i would do. :whacked:

I gotta agree, this is a great board full of great people. And yes, That is basically what I was gettin' at there lt1s10.

I frequent a number of boards, this one included and it is very laid back, comparitively. Some of the others aren't too bad, but most would just as soon rip yer head off. Needless to say, I'm not on there very often or for very long. But this one is a tad different and most folks here are great. I have learned some great things and hope I have helped on occasion too, but enough of the mushy crap now, all nascar drivers suck, buncha hillbillies drivin' in a darn circle. Drag racin' is where it's at. I guess I watch a little F1 also, but I think GP bike racing is my favorite. Watchin' one of those guys comin' out of a corner on one tire, OH MY LAWD. That's gotta be a rush.

i like all racing, nascar, drag racing, F1, IRL, horse racing, bike racing, just about anything but marathons. i love grand prix