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73 bus anyone know what this sound is?



 
 
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  #1  
Old October 18th 05, 06:30 PM
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Default 73 bus anyone know what this sound is?

http://jboothbee.tripod.com/vw.wav

Kind of a high pitched chirp.
You can hear the hard drive of the
laptop on the recording.

The mic starts out in the cab,
then I move it into the engine
compartment in the last 1/8th of the
recording.

Sounds to me like there is a valve
leak? High pitched sounding chirp

Ads
  #2  
Old October 19th 05, 12:55 AM
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Default 73 bus anyone know what this sound is?

That baby sounds sweet, I don't hear anything. Sounds slightly rough
like my beetle. I thought the beetle was bad.. Is this generally how a
VW is supposed to sound? I just thought they were more quiet. I'm going
to post a .wav of my beetle engine tommorow.

  #3  
Old October 19th 05, 04:27 AM
Funkie
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Default 73 bus anyone know what this sound is?

I'm no expert but it sounds like your valves need to be adjusted. What is
the mileage on the engine and what oil are you using. What climate are you
in?

Which bus engine is it? 1770 , 2000 or a T1 1600?

> wrote in message
oups.com...
> That baby sounds sweet, I don't hear anything. Sounds slightly rough
> like my beetle. I thought the beetle was bad.. Is this generally how a
> VW is supposed to sound? I just thought they were more quiet. I'm going
> to post a .wav of my beetle engine tommorow.
>



  #4  
Old October 19th 05, 06:35 AM
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Default 73 bus anyone know what this sound is?

1700cc 1973 bus

10w30 oil

valves were adjusted 0 miles
ago (new heads)

exhaust = .08
intake = .06

  #5  
Old October 19th 05, 07:29 AM
fullopiss
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Default 73 bus anyone know what this sound is?

yeah i got a problem too, mine goes brrrrrrrrrrrrrr, grtttttttttt, ptang
ptang ptang, brrrrrrrrrrrrrr
> wrote in message
ups.com...
> 1700cc 1973 bus
>
> 10w30 oil
>
> valves were adjusted 0 miles
> ago (new heads)
>
> exhaust = .08
> intake = .06
>



  #8  
Old October 19th 05, 05:13 PM
[email protected]
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Default 73 bus anyone know what this sound is?

Just posted my engine recording:

http://groups.google.com/group/rec.a...5b1ab07e80f835

  #9  
Old November 5th 05, 11:17 PM
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Default 73 bus anyone know what this sound is?

http://jboothbee.tripod.com/vwsound.wav

new sound sample uploaded.

first on the left side of engine
then on the right side of engine,
then from top of the engine compartment..

high pitched chirp twice per crank
revolution..

Jen

  #10  
Old November 6th 05, 01:31 AM
[email protected]
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Default 73 bus anyone know what this sound is?

I did some more listening to the engine.

#1)yes, it will run.
#2)the sound (chirp, like vaccum or pressure) alternates between
left/right of engine
#3)the sound is eliminated from the left side of the engine when I
remove the plugs from the left side

ok... sources of input and output from the sides of the engine:

1)balance tube for air. connects to "master" output on top of left
side carb. connnects to top of left side manifold. connects to top
of right side manifold

#2)"balance" tube for brake booster. this is at the base of each
manifold, they are connected by metal tube. brake booster connects to
this tube.

#3)EGR tube. EGR isn't connected (crimped off before it goes to
exhaust). This connects front(of car) of manifolds together, T to
exhaust is crimped, but manifolds are connected... I didn't put new
gaskets between the tube and the manifold,

#4)EGR ?valves? on manifolds. These are vacuum diaphragms on the
outer side of each manifold.

#5) bad seal between carb and manifold? (on both sides?)

#6)bad seal between manifold and head? (both sides?)

Exhaust: sounds like the sound is on top of the engine,
not on the bottom.



#7)exhaust output, exhaust leak. two ports on bottom of each head.

Any ideas? I think the sound may be tied to the manifolds and EGR
valves on the manifolds.

Jenny

 




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