[T3] Moaning in and out of gear

[William J]

I had ear buds in . I listened three times and hear nothing. I had my fan 
welded many years ago and don't have any noise I can hear. Not the blades 
just the center hub.

 It's really difficult at least for me to hear any noise unless I'm near the 
car. If you feel it in the fan housing and the fan was balanced then I doubt 
it's the fan.

 Does it make any difference if the engine is cold or warmed up? If so 
perhaps it's the flaps not open the set amount when fully closed or one is 
more open than the other.

 I read some where on Samba where someone build's the proper rubber 
mounting's for the fans hub . Can't say if it will solve anything if you did 
this.

 I recall when working for Ford we had two tools , one was 6 leads with 
clips to locate noises so you would position them at points and listen 
through head phones and switch through the 6 positions. The other was a 
heavy unit that set up vibrations you could dial in to check if anything was 
suspect yet in both cases they were a long shot at best.

 I wish I could be more help .
----- Original Message ----- 
From: "Daniel Nohejl" <d.nohejl at gmail.com>
To: <type3 at vwtype3.org>
Sent: Monday, June 27, 2016 6:27 PM
Subject: Re: [T3] Moaning in and out of gear


> Yes, changed the muffler yesterday and it has no bearing on the sound. Are 
> you sure you don’t hear anything? I have tinnitus in both hears and some 
> moderate hearing loss and it’s as plain as day to me. Try earbuds or 
> something?
>
> A bit more info……when standing behind the car, I can hear the noise when 
> Jessica revs the motor to the rpm the noise emerges at. When I open the 
> hatch, I hear it less, and when I open the engine cover I can barely hear 
> it at all but I can feel vibration/pulsing in the fan housing in synch 
> with the noise. So the full experience of the noise requires everything to 
> be buttoned up so that it can resonate more fully under the cover and in 
> the rear of the car.
>
> So it would seem to be the fan. It was welded and balanced. My 
> understanding is that the fan is something of a harmonic balancer so 
> perhaps the welding changes how it resonates? Not only were the individual 
> blades welded but the center of the fan was tack welded to the larger 
> outer fan. Am I on to something? If not the fan, perhaps the housing?
>
> I have some recollection of hearing the noise months ago but kind of 
> forgot about it until recently but, again, I can’t tell if that’s because 
> it’s worse or I’m just tuned into it more.
>
>
>
>> On Jun 27, 2016, at 8:02 PM, William J <catnine09 at dslextreme.com> wrote:
>>
>> Did you change the muffler yet? I really could not hear anything on the 
>> video's.
>> ----- Original Message ----- From: "Daniel Nohejl" <d.nohejl at gmail.com>
>> To: <type3 at vwtype3.org>
>> Sent: Monday, June 27, 2016 2:25 PM
>> Subject: [T3] Moaning in and out of gear
>>
>>
>>> So I’ve either recently developed or only recently became attuned to an 
>>> irritating moaning noise coming from the back of the car under the 
>>> engine lid or thereabouts. It’s a relatively low pitched moaning 
>>> wuh-wuh-wuh-wuh sound that appears at the following points whether 
>>> accelerating or decelerating. Because of the speeds it occurs at, 
>>> driving in traffic has become really annoying:
>>>
>>> 12-15mph in 1st
>>> 20-23mph in 2nd
>>> 30-35mph in 3rd
>>>
>>> It sounds for the life of me like wheel bearings but there are two 
>>> things ruling them out. I’m confused b/c it seems that #1 would indicate 
>>> the transmission and #2 indicates the motor, possibly the fan?
>>>
>>> 1. if the sound is occurring and I immediately shift into neutral, the 
>>> sound goes away
>>>
>>> 2. i can reproduce the sound in neutral by revving the motor to a 
>>> certain rpm
>>>
>>> Here’s what it sounds like b/w 20 and 23 in 2nd. You need to either be 
>>> close to your computer speakers or wearing headphones. It might be hard 
>>> to pick up the sound at first, but once you do, it’s unmistakeable:
>>>
>>> https://www.youtube.com/watch?v=oq6p3Tqm9i4 
>>> <https://www.youtube.com/watch?v=oq6p3Tqm9i4>
>>>
>>> And here’s a really brief clip with the trans in 3rd….you can hear it 
>>> disappear as we accelerate
>>>
>>> https://www.youtube.com/watch?v=nIo2mSKabLk 
>>> <https://www.youtube.com/watch?v=nIo2mSKabLk>
>>>
>>> Ahead of a big cross country trip starting next week, I’m a bit nervous 
>>> and having been burned so many times, I fear something grave is wrong. I’ll 
>>> go poking around and whatnot, but I wonder if this sound rings any 
>>> bells.
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