[Vwdiesel] Re: [Audi-VW-Diesels] RE:82 diesel vanagon passed the diesel emissions test...

[Nate Wall]

--
[ Picked text/plain from multipart/alternative ]
<<<<<I was just looking at the engine
yesterday, listening and heard this new sound.  It's a metallic kind of
pingy sound - fast ping, ping, ping, ping.  I notice it at idle and it
increases with revs then goes away as the revs climb.  If you had a
metal
rod and banged it on something hard the resonating noise is a similar
kind
of sound.  I'm wondering what that might be.  I could do with a list of
engine noises and what they all mean.  I was also wondering how noisy
the
valves should be?  I'm guessing a normal or slightly loose valve
clearance
is noisier than a tight one?>>>>

If its a pre-86 motor, its probally the lifters clicking (the clearance
between the cam and shim.  Yes, even slightly too loose on the exhausts
cause a noticable clicking.  Hydraulic heads should be quiet in this
sarea.

--Nate

jon.sykes at ps.ge.com wrote:

>  Thanks to everybody who took the time to comment and respond to my
> post.
> It's great to know such a great bunch of helpful people who have a
> common
> interest.
>
> I took the van to the local car wash pressure washer yesterday.  I
> used some
> diluted driveway cleaner and the tire cleaner (I think it's basically
> the
> same as engine cleaner) all over the engine and engine bay.  I covered
> the
> alternator with a plastic bag and put up some plastic to protect the
> interior and cabinets as much as I could.  Then I let rip.  It
> actually did
> a pretty good job, getting rid of a lot of crud - especially what had
> accumulated on the metal cover below the engine.
>
> After cleaning everything off and finishing up I sat down and went to
> drive
> off.  Turned the key...nothing.  Turned again...nothing.  Starting to
> worry
> now.  'Oh No.  What have I done.'  Should've kept a dirty engine that
> would
> start.  Turned again...started.  Joy.  I'm wondering what might have
> got wet
> that prevented it starting and why it dried so quick to start 3rd
> time.  If
> this happens again I'd like to know where to start troubleshooting.
>
> A couple of times over the last week I've also heard a buzzing kind of
> noise
> when I turn the key one position before actually starting the engine.
> At
> first I thought it was the fuel pump, but the fact that it doesn't do
> it
> everytime probobly means it can't be.  The noise would continue for a
> few
> moments after the engine started too.  I noticed it first with the
> engine
> cover off but could also detect it with the cover back on.  It's a
> high
> pitch kind of buzzing noise.  Anyone know what that might be?  These
> intermittant problems are the worst kind to try and troubleshoot.
> Basically, I just want to be sure that I've covered the bases to make
> sure
> the van starts when I'm on a trip.  I don't have the owners manual for
> my
> van and find the Bentley kind of overwhelming.
>
> Another question concerns kinds of engine noises.  I know diesels are
> quite
> a bit louder mechanically than their gas counterparts, but I find
> myself
> wondering what the different noises are.  I was just looking at the
> engine
> yesterday, listening and heard this new sound.  It's a metallic kind
> of
> pingy sound - fast ping, ping, ping, ping.  I notice it at idle and it
>
> increases with revs then goes away as the revs climb.  If you had a
> metal
> rod and banged it on something hard the resonating noise is a similar
> kind
> of sound.  I'm wondering what that might be.  I could do with a list
> of
> engine noises and what they all mean.  I was also wondering how noisy
> the
> valves should be?  I'm guessing a normal or slightly loose valve
> clearance
> is noisier than a tight one?
>
> Questions, questions....
>
>                    Yahoo! Groups Sponsor
                        ADVERTISEMENT


>
> Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
--