[DeTomaso] Techno question: a fine mess--update II

[Charles Engles]

Dear Bill and Asa, et al,


           Test drive without the AC belt still showed noise.   While the engine was still warm, I removed the alternator belt.  To my surprise, the chirpy noise is still there.  The garden hose stethoscope seemed to show that it was maximal within the bowl of the crank pulley.   Hmmm???  No noise from the oil pan nor water pump (obviously).

           Next, I removed the crank pulley and the noise is still chirping away.   I checked again that the balancer isn't hitting anything on its backside and a wire hanger feeler shows nothing between the back of the balancer and the front cover or oil pan.

           Next, I could only imagine that I had somehow not torque the balancer bolt well and that it was loose.  Sorry, it is tight and I am sure that it has a dose of anti seize and the correct torque.  

           The balancer is a BHJ and is about nine years old with about 10k miles.  It looks good.  It was recently out and reinstalled last year before the Houston Rally.  No noise was noticed until afterwards while driving "normally" in town, etc.   Sounded like a belt, but it isn't all belt noise.

           I suppose the next step would be to loosen the balancer bolt, again apply a touch of antiseize if it looks like it needs it and then retorque.


                     Warmest regards, Chuck Engles




-----Original Message-----
From: bill gaino [mailto:gaino at earthlink.net] 
Sent: Sunday, October 11, 2015 9:09 AM
To: Charles Engles
Subject: Re: [DeTomaso] Techno question: a fine mess--update

Charles, I went thhrough this with a corvette it turned out to be a loose harmonic balancer bolt. Big one that goes in the end of crank.  Bill 1362


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-----Original Message-----
>From: Charles Engles <cengles at cox.net>
>Sent: Oct 10, 2015 9:30 PM
>To: detomaso at poca.com
>Subject: Re: [DeTomaso] Techno question: a fine mess--update
>
>Dear Forum,
>
>
>           It is still a fine mess.  The gremlins are well entrenched.  
>At this point, I have:
>
>1) ascertained that the balancer isn't hitting the block or pan
>
>2) been unable to localize precisely the noise source despite the 
>mechanic's stethoscope or the garden hose stethoscope (it actually 
>works a little better in this instance, but still not a success).  It 
>is coming from the front of the engine-belt area.
>
>3) replaced the alternator: no change and now the ammeter needle 
>bounces
>
>4) ascertained that I do have an electronic voltage regulator from 
>Motorcraft
>
>5) replaced both belts: no change other than  a slight decrease in 
>loudness and slightly different quality to the noise
>
>6) replaced the idler pulley:  no change. Sigh.   The old pulley does feel
>like the bearing is starting to go out compared to the smoothness of 
>the replacement, but still no noise silencing with the change.
>
>
>        I am perturbed.  I have removed the new AC belt and I will test 
>again tomorrow to see if I have finally localized the noise maker.  I 
>am thinking about trying some of the belt treatments for squeaking 
>since I have replaced *everything* at this point.
>
>
>        With apologies to Mr. Friedman's famous quote: " Sadder, older, 
>wiser, I go now, seeking through faith and reason combined  the answer 
>to this baffling pageant which is the Pantera and the small by play, 
>which is my amateur wrenching."
>
>
>                  Philosophically yours,  Chuck Engles
>
>
>
>  
>
>
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