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 HALP me identify mystery engine noise.

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Sprocket

Sprocket

Posts : 5582
Join date : 2008-11-04
Location : Palm Beach County

HALP  me identify mystery engine noise. Empty
PostSubject: HALP me identify mystery engine noise.   HALP  me identify mystery engine noise. Icon_minitimeWed Oct 09, 2013 8:43 pm

So this is my boy's 92 L03 with about 150K on it. It's been leaking a bit of oil (not horrible amounts, but a quart every few weeks I guess). The last documented change was 9K ago when he got the car. We both think it's been done in the interim but no one wrote it down. Oil smells fine, changed it tonight, nothing unusual, just the standard couple of metal flecks in it

Anyway when he pulled into the driveway last night I heard this noise. I don't like it. It seems to be centered in the middle of the motor (not on either bank). Please excuse the crappy cell phone video and darkness but it's primarily an audio recording.

I would like to hear your opinions please. I have one but I don't want to prejudice anyone with an idea.

thanks.

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Sprocket

Sprocket

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PostSubject: Re: HALP me identify mystery engine noise.   HALP  me identify mystery engine noise. Icon_minitimeWed Oct 09, 2013 8:46 pm

Engine at idle. Wind noise from the fan. the red thing at the end is the water pump (put the phone down over it by front of block).
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toomanytoyz

toomanytoyz

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Location : Sandown, NH USA

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PostSubject: Re: HALP me identify mystery engine noise.   HALP  me identify mystery engine noise. Icon_minitimeWed Oct 09, 2013 8:50 pm

I'm thinking it's the fan hitting the shrowd or make the flexplate hitting the inspection cover. It's too fast and "ticky" to be bottom end.
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Sprocket

Sprocket

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PostSubject: Re: HALP me identify mystery engine noise.   HALP  me identify mystery engine noise. Icon_minitimeWed Oct 09, 2013 9:04 pm

The only bottom end issue I ever had was I broke the crank in two. There weren't noises other than a really loud BANG at 4000 RPM as I shifted and the rear wheels locking up when I let the clutch out....

doubt it's the inspection cover, as when we put the vette starter in one bolt was hitting it, so we shimmed it with washers and such. And the cover is plastic, this is metallic.

I'm thinking water pump bearing maybe?
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phantom 309

phantom 309

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PostSubject: Re: HALP me identify mystery engine noise.   HALP  me identify mystery engine noise. Icon_minitimeWed Oct 09, 2013 9:13 pm

X2 on the fan,.

pull the belt ,. see if it,s still noisy,.

Nick
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Sprocket

Sprocket

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PostSubject: Re: HALP me identify mystery engine noise.   HALP  me identify mystery engine noise. Icon_minitimeWed Oct 09, 2013 9:44 pm

belt pulled, noise stopped. Found the pulley on the spring to be wobbly and loose
although it still made that noise afterward. Stood on the drivers side and goosed the throttle and got hit in the head with little chunks of most likely fan shroud and the noise stopped


Yaaay.


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toomanytoyz

toomanytoyz

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PostSubject: Re: HALP me identify mystery engine noise.   HALP  me identify mystery engine noise. Icon_minitimeWed Oct 09, 2013 9:59 pm

What do I win? Wink
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Sprocket

Sprocket

Posts : 5582
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PostSubject: Re: HALP me identify mystery engine noise.   HALP  me identify mystery engine noise. Icon_minitimeWed Oct 09, 2013 10:05 pm

Cerveza fria en la playa! Just come on down.
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lakeffect
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lakeffect

Posts : 3889
Join date : 2009-08-18
Location : Rochester NY 14621

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PostSubject: Re: HALP me identify mystery engine noise.   HALP  me identify mystery engine noise. Icon_minitimeWed Oct 09, 2013 10:07 pm

Crovo, Translated that means you won  "little chunks of most likely fan shroud"
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sherlock9c1



Posts : 2113
Join date : 2009-05-28
Location : Huntsville, AL

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PostSubject: Re: HALP me identify mystery engine noise.   HALP  me identify mystery engine noise. Icon_minitimeThu Oct 10, 2013 12:33 am

A noise like that, albeit at a higher frequency, could also be a failed ignition coil ticking as it arcs internally with every firing. I had that happen to me on my '94 RMW - sounded like the AIR pump until I unplugged the airpump and still heard it, very rpm dependent too.
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toomanytoyz

toomanytoyz

Posts : 3233
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PostSubject: Re: HALP me identify mystery engine noise.   HALP  me identify mystery engine noise. Icon_minitimeFri Oct 11, 2013 10:47 am

Sprocket wrote:
Cerveza fria en la playa!    Just come on down.
Woot! See ya Saturday morning! Wink

lakeffect wrote:
Crovo, Translated that means you won  "little chunks of most likely fan shroud"
Not gonna lie. I lol'd. Smile
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HALP  me identify mystery engine noise. Empty
PostSubject: Re: HALP me identify mystery engine noise.   HALP  me identify mystery engine noise. Icon_minitime

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