[DeTomaso] What is this engine noise?
sean mundy
seanmundy at hotmail.com
Fri Aug 31 16:22:27 EDT 2018
Spent a bunch more time over and under the engine without being able to nail down the noise.
As a last resort I just sprayed some water on the belt. Surprisingly the noise disappeared!
The belt is only a couple years old. Maybe I have it too tight. I need to clean up the water that slung up all over my headliner ☹
I will let everything dry out and try it again later and see if the squeal noise is back.
I will spray some water on it again and confirm that I found the issue. Fingers crossed!!
From: Asa Jay Laughton<mailto:asajay at asajay.com>
Sent: Thursday, August 30, 2018 10:03 PM
To: detomaso at server.detomasolist.com<mailto:detomaso at server.detomasolist.com>
Stranger things...
Water pump
Alternator
A/C compressor
My first thought was that it sounded like a bearing, but not a rod or
main or cam... like a ball bearing, like maybe the throwout bearing in
the trans, or a pilot bearing/bushing. Then I thought about the list above.
Then I thought Les might be onto it, but you said the baffles had been
removed. Then I though maybe a vacuum leak at the carb or intake, but
that would typically be rhythmic.
Be sure to let us know what you find.
Asa Jay
Asa Jay Laughton - W7TSC, MSgt, USAFR, Retired
Spokane County ARES-RACES Net Manager
******************************
http://w7tsc.org
http://www.teampanteraracing.com
On 8/30/2018 18:06, sean mundy wrote:
> At first I noticed it after it was hot. I got home and it was not making the noise anymore. I took the valve covers off cause it seemed that might be where it was coming from. Got a lot of good ideas of other things to check now. Thank you :)
>
>
>
>> On Aug 30, 2018, at 5:55 PM, Sean Korb <spkorb at gmail.com> wrote:
>>
>> It sounds fantastic! I had the subwoofer set up so at first I was like
>> "what noise?" But the noise could be a tiny vacuum leak too making a
>> whistling noise. Maybe even whistling through the carburetor
>> venturis. It's a little shocking how much noise a carburetor actually
>> makes, automakers would build baffles and play with air box size to
>> quell it. A smoke generator could show any leaks. Is the motor hot
>> or cold or it doesn't matter when you hear the noise?
>>
>> I do like the baffle theory but I kind of expect it to be noisier.
>> The noise also sounds very familiar... like around old cars but
>> benign-ish. Honestly it seems weird to me that I don't know what it
>> is.
>>
>>> On 8/30/18, sean mundy <seanmundy at hotmail.com> wrote:
>>> I can not figure out what this noise is or where its exactly coming
>>> from. I've checked the rocker arms and they are all tight.
>>> I have roller rockers and lifters. Is this the sound if one of them is
>>> bad?
>>> [1]https://youtu.be/o4Q06VvjuWI
>>>
>>> References
>>>
>>> 1. https://youtu.be/o4Q06VvjuWI
>>>
>>
>> --
>> Sean Korb spkorb at spkorb.org http://www.spkorb.org
>> '65 Suprang,'68 Cougar,'78 R100/7,'60 Metro,'59 A35,'71 Pantera #1382
>> "The more you drive, the less intelligent you get" --Miller
>> "Computers are useless. They can only give you answers." -P. Picasso
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-------------- next part --------------
Spent a bunch more time over and under the engine without being able to
nail down the noise.
As a last resort I just sprayed some water on the belt.
Surprisingly the noise disappeared!
The belt is only a couple years old. Maybe I have it too tight.
I need to clean up the water that slung up all over my headliner :-(
I will let everything dry out and try it again later and see if the
squeal noise is back.
I will spray some water on it again and confirm that I found the
issue. Fingers crossed!!
From: [1]Asa Jay Laughton
Sent: Thursday, August 30, 2018 10:03 PM
To: [2]detomaso at server.detomasolist.com
Stranger things...
Water pump
Alternator
A/C compressor
My first thought was that it sounded like a bearing, but not a rod or
main or cam... like a ball bearing, like maybe the throwout bearing in
the trans, or a pilot bearing/bushing. Then I thought about the list
above.
Then I thought Les might be onto it, but you said the baffles had been
removed. Then I though maybe a vacuum leak at the carb or intake, but
that would typically be rhythmic.
Be sure to let us know what you find.
Asa Jay
Asa Jay Laughton - W7TSC, MSgt, USAFR, Retired
Spokane County ARES-RACES Net Manager
******************************
http://w7tsc.org
http://www.teampanteraracing.com
On 8/30/2018 18:06, sean mundy wrote:
> At first I noticed it after it was hot. I got home and it was not
making the noise anymore. I took the valve covers off cause it seemed
that might be where it was coming from. Got a lot of good ideas of
other things to check now. Thank you :)
>
>
>
>> On Aug 30, 2018, at 5:55 PM, Sean Korb <spkorb at gmail.com> wrote:
>>
>> It sounds fantastic! I had the subwoofer set up so at first I was
like
>> "what noise?" But the noise could be a tiny vacuum leak too making a
>> whistling noise. Maybe even whistling through the carburetor
>> venturis. It's a little shocking how much noise a carburetor
actually
>> makes, automakers would build baffles and play with air box size to
>> quell it. A smoke generator could show any leaks. Is the motor hot
>> or cold or it doesn't matter when you hear the noise?
>>
>> I do like the baffle theory but I kind of expect it to be noisier.
>> The noise also sounds very familiar... like around old cars but
>> benign-ish. Honestly it seems weird to me that I don't know what it
>> is.
>>
>>> On 8/30/18, sean mundy <seanmundy at hotmail.com> wrote:
>>> I can not figure out what this noise is or where its exactly
coming
>>> from. I've checked the rocker arms and they are all tight.
>>> I have roller rockers and lifters. Is this the sound if one of
them is
>>> bad?
>>> [1]https://youtu.be/o4Q06VvjuWI
>>>
>>> References
>>>
>>> 1. https://youtu.be/o4Q06VvjuWI
>>>
>>
>> --
>> Sean Korb spkorb at spkorb.org http://www.spkorb.org
>> '65 Suprang,'68 Cougar,'78 R100/7,'60 Metro,'59 A35,'71 Pantera
#1382
>> "The more you drive, the less intelligent you get" --Miller
>> "Computers are useless. They can only give you answers." -P.
Picasso
> _______________________________________________
>
>
> Detomaso Email List is not managed by POCA
> Posted emails must not exceed 1.5 Megabytes
> DeTomaso mailing list
> DeTomaso at server.detomasolist.com
> http://server.detomasolist.com/mailman/listinfo/detomaso
>
> To manage your subscription (change email address, unsubscribe, etc.)
use the links above.
>
> Members who post to this list grant license to the list to forward
any message posted here to all past, current, or future members of the
list. They also grant the list owner permission to maintain an archive
or approve the archiving of list messages.
>
> ---
> This email has been checked for viruses by AVG.
> https://www.avg.com
>
>
_______________________________________________
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Posted emails must not exceed 1.5 Megabytes
DeTomaso mailing list
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list. They also grant the list owner permission to maintain an archive
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References
1. mailto:asajay at asajay.com
2. mailto:detomaso at server.detomasolist.com
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