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Rattling noise when rotating flywheel

#1

J

JimP2014


So here's a video I made today so the background story is Friday I started noticing white smoke coming out of the muffler took off the air filter and there was white smoke coming out of that I was thinking it's probably a head gasket so I took off the cylinder head and removed the spark plug and then I noticed what I was rotating the flywheel there's this weird rattling noise I never heard it before. So I did search on what this could be meaning when you rotate the flywheel Piston makes this rattling noise or the engine itself makes a rattling noise and there's like eight different things could be but I'm hoping with the video someone who's had experience looking at something like this before and they're able to say I know exactly what that is if that's possible that would be fantastic otherwise since I already have to replace the head gasket I will do that but beyond that is a flywheel key damaged are there some magnets underneath the flywheel that came loose like there's all kinds of things and I just wonder if anyone can just tell from hearing this what I need to look at size of course replacing the head gasket since I already was planning on doing that.

It is a Sears Craftsman lt 2000 , 19.5 horsepower OHV engine I can provide more specifications I just thought that it's something that could happen to many different models and it would all produce that same kind of rattling noise.

Thanks,
Jim


#2

J

JimP2014

JimP2014 said:

So here's a video I made today so the background story is Friday I started noticing white smoke coming out of the muffler took off the air filter and there was white smoke coming out of that I was thinking it's probably a head gasket so I took off the cylinder head and removed the spark plug and then I noticed what I was rotating the flywheel there's this weird rattling noise I never heard it before. So I did search on what this could be meaning when you rotate the flywheel Piston makes this rattling noise or the engine itself makes a rattling noise and there's like eight different things could be but I'm hoping with the video someone who's had experience looking at something like this before and they're able to say I know exactly what that is if that's possible that would be fantastic otherwise since I already have to replace the head gasket I will do that but beyond that is a flywheel key damaged are there some magnets underneath the flywheel that came loose like there's all kinds of things and I just wonder if anyone can just tell from hearing this what I need to look at size of course replacing the head gasket since I already was planning on doing that.

It is a Sears Craftsman lt 2000 , 19.5 horsepower OHV engine I can provide more specifications I just thought that it's something that could happen to many different models and it would all produce that same kind of rattling noise.

Thanks,
Jim
Click to expand...
If you have a list of eight things or 10 things that it could be I have that list already thanks on that but I'm interested in knowing exactly what it is so if you don't know that I already got the general list or even if you can narrow it down to two things that would be fantastic truly

Jim


#3

J

JimP2014

JimP2014 said:

So here's a video I made today so the background story is Friday I started noticing white smoke coming out of the muffler took off the air filter and there was white smoke coming out of that I was thinking it's probably a head gasket so I took off the cylinder head and removed the spark plug and then I noticed what I was rotating the flywheel there's this weird rattling noise I never heard it before. So I did search on what this could be meaning when you rotate the flywheel Piston makes this rattling noise or the engine itself makes a rattling noise and there's like eight different things could be but I'm hoping with the video someone who's had experience looking at something like this before and they're able to say I know exactly what that is if that's possible that would be fantastic otherwise since I already have to replace the head gasket I will do that but beyond that is a flywheel key damaged are there some magnets underneath the flywheel that came loose like there's all kinds of things and I just wonder if anyone can just tell from hearing this what I need to look at size of course replacing the head gasket since I already was planning on doing that.

It is a Sears Craftsman lt 2000 , 19.5 horsepower OHV engine I can provide more specifications I just thought that it's something that could happen to many different models and it would all produce that same kind of rattling noise.

Thanks,
Jim
Click to expand...
I changed my mind it's not a rattling noise it's more like a wild boar but it's real unfortunately.


#4

Scrubcadet10

Scrubcadet10

put some oil in the cylinder and see if it goes away.


#5

J

JimP2014

Scrubcadet10 said:
put some oil in the cylinder and see if it goes away.
Click to expand...
Hello thank you very much I will try that tomorrow.

Jim


#6

J

JimP2014

JimP2014 said:
Hello thank you very much I will try that tomorrow.

Jim
Click to expand...
So I tried what you said and nothing changed and so I tried to kind of get on the ground and make a long story short something to do with the drive shaft the pulley + the mower deck belt so I just slightly unhook the belt so to speak + the noise went away so there's something going on and I have to get on the ground but it was some sort of rattling noise so when things dry up but that's good to know I had no idea what was going on and I did your test like I said and the cylinder looks really clean out cracks or scores or whatever in it so maybe just the head gasket and get those bolts to 18.3 foot pounds pretty sure that's the spec.

Jim


#7

J

JimP2014

So I put the belt back on over the belt guide the one for way up front the drive shaft mower deck pulley and the noise goes away completely while rotating the flywheel. It should be the case where when everything is correctly configured there's a noise when you remove the belt over that guide there's no noise and you can go back and forth noise no noise noise no noise noise but not this.


#8

J

JimP2014

I just wanted to give an update on that rattling noise so it turns out the front left belt guide is in close contact with the pulley for the mower deck and that pulley comes off the drive shaft so I don't know if it's supposed to make contact if somehow u-shaped belt guide was bent but that definitely is the source of the rattling noise so it's where you have the cylinder head off the spark plug out and you're rotating the flywheel and you hear a rattling noise. I'm going to have to check the other side and see how close the belt guide is to the large pulley on the drive shaft but I'm guessing they shouldn't be touching neither of them?

Jim


#9

D

Douglas Lee

Sounds like a scrape to me?
Douglas Lee
*


#10

J

JimP2014

Douglas Lee said:
Sounds like a scrape to me?
Douglas Lee
*
Click to expand...
Yeah now that I know what it is and I'm reading what you're saying that's the noise it's a scraping noise it's not that easy to bend that belt guide back away from the pulley I just don't want to break anything with heavier equipment let's say.


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