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Scary noise
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Mr.Duncan
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PostPosted: Fri May 10, 2013 5:14 pm    Post subject: Scary noise Reply with quote

What does this noise sound like?

Scary :/

Is this "rod nock" Sad


Link

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FLUX
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PostPosted: Fri May 10, 2013 7:28 pm    Post subject: Reply with quote

Id try running it very shortly with the fan belt off.. If it still makes the noise it MIGHT be the fly wheel has come loose... But, if it still makes the noise when the fan belt is off Id drain the oil and look for metal shiney bits first.
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Mr.Duncan
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PostPosted: Fri May 10, 2013 7:59 pm    Post subject: Reply with quote

FLUX wrote:
Id try running it very shortly with the fan belt off.. If it still makes the noise it MIGHT be the fly wheel has come loose... But, if it still makes the noise when the fan belt is off Id drain the oil and look for metal shiney bits first.


Fan belt off noise continues.

New Fly wheel was put on by a mechanic 1000miles ago

No metal shavings...
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68IHscout Premium Member
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PostPosted: Fri May 10, 2013 9:12 pm    Post subject: Reply with quote

Take it back to the mechanic
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Glenn73
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PostPosted: Fri May 10, 2013 10:32 pm    Post subject: Reply with quote

How is the end play?
Mine sounded like that and I thought the same thing. Tore it down and found out the cam gear was being chewed up, causing the knock.
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Danwvw
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PostPosted: Fri May 10, 2013 10:43 pm    Post subject: Reply with quote

That's the engine tin hitting the inside of the crank pulley, Needs a slight tweak with a long flat blade screwdriver. Stop the engine and place the screwdriver on the right side and behind the pulley and shove the tin back a little more. It could make it worse but you will figure out which way to move it through trial and error.
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Mr.Duncan
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PostPosted: Sat May 11, 2013 3:01 am    Post subject: Reply with quote

Danwvw wrote:
That's the engine tin hitting the inside of the crank pulley, Needs a slight tweak with a long flat blade screwdriver. Stop the engine and place the screwdriver on the right side and behind the pulley and shove the tin back a little more. It could make it worse but you will figure out which way to move it through trial and error.


This could cause that knocking noise? Or are you talking about the constant rubbing wine?
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Danwvw
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PostPosted: Sat May 11, 2013 8:56 am    Post subject: Reply with quote

The whine or screech sound, perhaps that's just the whistle of the exhaust or the whine of the fan belt.
I just listened to mine here: Cold Start, it's a little clunky but I think it's just the fan belt slapping around. Belt sounds will tend to clear up if you squirt water on the belt. Looks like I need to adjust my fan belt. My engine clucks a little bit which I thinks may be due to a small amount of end-play in the crankshaft, I am not worried about it but will rebuild it before another 12000 miles.
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johnnypan
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PostPosted: Sat May 11, 2013 9:02 am    Post subject: Reply with quote

don't sound like a rod to me...rod knock is distinctive, it sounds like a rhythmic hammer,a sharp knock the gets worse under load.
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mukluk
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PostPosted: Sat May 11, 2013 9:24 am    Post subject: Reply with quote

johnnypan wrote:
don't sound like a rod to me...rod knock is distinctive, it sounds like a rhythmic hammer,a sharp knock the gets worse under load.


Agreed, sounds more so valve train related to me. Try using a mechanic's stethoscope or suitable substitute to narrow down where exactly the noise is coming from.
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badufay
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PostPosted: Sat May 11, 2013 12:01 pm    Post subject: Reply with quote

My bus once had a similar sound when the rocker arm actually came loose. Pop off the valve cover, check the rocker arms for tightness and since you're there, check the valves real quick too!

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Danwvw
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PostPosted: Sun May 12, 2013 11:18 am    Post subject: Reply with quote

Yeah Mine too. The Rocker would some how shift sideways and come off the valve. Mine kind off sounded like a loud loose valve tappet though on top of the clatter I am hearing on his video. I wonder if it is the flywheel coming loose again. I use Loctite blue on mine. Loctite Blue 242.
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truelinebob
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PostPosted: Sun May 12, 2013 8:17 pm    Post subject: Reply with quote

loose or busted cam rivets, pull the oil pump and see, just found some on a 1915 a couple weeks ago that had a 3 rivet cam in it.
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Mr.Duncan
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PostPosted: Mon May 13, 2013 5:05 am    Post subject: Reply with quote

Pulled the engine, the shop put it on an engine stand, they know the noise is internal, but not sure what it is without a tear down....

Flywheel is fine.

Replaced the clutch while it was out.
Later today when its cold, im going to re-torque the rocker arms, and adjust the valves.

Ill update if that fixes it.

Image may have been reduced in size. Click image to view fullscreen.
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[email protected]
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PostPosted: Mon May 13, 2013 8:23 am    Post subject: Reply with quote

I had a 1200 that sounded like that. The crank cracked on a stress riser from being drilled for balancing.

It was still held in place by bearings but was in 2 pieces
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Mr.Duncan
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PostPosted: Mon May 13, 2013 8:48 am    Post subject: Reply with quote

[email protected] wrote:
I had a 1200 that sounded like that. The crank cracked on a stress riser from being drilled for balancing.

It was still held in place by bearings but was in 2 pieces


Sweet Jesus...

Its been making this noise for 1000 miles...

Hasn't "exploded yet"
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My 1971 Super Beetle rebuild thread
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Mr.Duncan
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PostPosted: Mon May 13, 2013 3:47 pm    Post subject: Reply with quote

when you say it could be a broken crank, Wouldn't I notice something wrong?

I/E when im driving at 65-70 mph notice some loud issues coming from the engine bay?

Still drives just fine.. its just that noise worries the shit out of me.

Adjusting valves tonight when cold to check.
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Danwvw
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PostPosted: Tue May 14, 2013 10:34 am    Post subject: Reply with quote

I just took apart a 74 bug engine that had been run quite a bit with a broken crankshaft. It was spitting case shavings all over behind the flywheel. Needless to say it ruined the case. Photo.
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Mr.Duncan
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PostPosted: Tue May 14, 2013 1:14 pm    Post subject: Reply with quote

Well, when i removed my engine, i had no metal bits by the flywheel area..

Or inside the oil
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truelinebob
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PostPosted: Tue May 21, 2013 7:13 pm    Post subject: Reply with quote

i will bet you it is the cam gear rivets
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