[DeTomaso] Techno question: a fine mess--update II
Will Kooiman
will.kooiman at gmail.com
Mon Oct 12 11:27:54 EDT 2015
Nobody said it, but a likely vacuum leak is at the intake gasket.
I pulled my intake once and saw a trail of oil getting sucked into the ports. Ever since, I always use sealer on the intake gasket. I used to always install them dry. I do not use print-o-seal.
And, of course, if the leak had been on the top of the port, it would have sucked air with the likely whistling sounds.
Sent from my iPhone
> On Oct 11, 2015, at 9:55 PM, John Taphorn <jtaphorn at kingwoodcable.com> wrote:
>
> Sloppy writing by me. I agree with Will's suggestion that......
>
> JT
>
>> On 10/11/2015 8:53 PM, John Taphorn wrote:
>> I second Will's doubt of the balancer and suggestion that you check the carb gasket or other possible vacuum leak.
>>
>> JT
>>
>>> On 10/11/2015 1:05 PM, Will Kooiman wrote:
>>> I don¹t see how a balancer could cause a howling or a squeal.
>>>
>>> I had a weird squeal once, and it turned out to be the carburetor gasket.
>>> There was a leak under the carburetor, and the gasket was vibrating like a
>>> reed in a flute. It sounded like it was coming from the timing chain. I
>>> tore the front of the engine apart, changed the timing chain, belts, fuel
>>> pump, etc. I didn¹t find the problem until I was feeling around under the
>>> carburetor while the engine was running. I could feel the gasket
>>> vibrating, and if I touched it, the sound stopped.
>>>
>>> What was the last thing changed before the sound started?
>>>
>>> On 10/11/15, 1:03 PM, "DeTomaso on behalf of Asa Jay Laughton"
>>> <detomaso-bounces at poca.com on behalf of asajay at asajay.com> wrote:
>>>
>>>> I'm not liking where this is going. I'd remove the balancer and run
>>>> it. You might get a little oil splash past the seal but I honestly
>>>> don't see how it could be the balancer. I'm beginning to fear its more
>>>> dastardly, like a main or rod bearing or thrust bearing on the cam.
>>>> Trouble is I don't think you can get the balancer off.
>>>> Asa
>>>> Sent using Jedi Mind Tricks
>>>>
>>>> Charles Engles <cengles at cox.net> wrote:
>>>> 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
>>>> https://www.facebook.com/pages/slickpaintcom/129049637149634?ref=ts&fre
>>>> f=ts
>>>> If you want it slick. www.slickpaint.com like us on facebook
>>>> -----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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