[DMCForum] Re: Exhaust Manifold Questions
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[DMCForum] Re: Exhaust Manifold Questions



An air cooled VW.... yeah, thats the sound, and audible under load...
not at idle or higher rpms.  I'll give the hose trick a try.

"Dodgy" ?????

Ron

--- In DMCForum@xxxxxxxxxxxxxxx, Martin Gutkowski <martin@xxxx> wrote:
>
> A dodgy tappet will sound, well, tappety. Think striking a metal
pin
> with a small hammer several times per second. An exhaust manifold
leak
> makes the engine sound like an air cooled VW engine. Often silent
at
> idle, sometimes even quiet when revved in neutral, but always
audible
> when putting the engine under most load - eg flooring it at 2000rpm.
>
> I sometimes use a length of hose which I hold one end to my ear and
run
> it around the manifold to find the leak. NB you won't hear it till
> you're right on top of it, if it's the manifold gasket.
>
> Martin
>
> gullwingmag wrote:
>
> > Rob
> >
> > While we are talking exhaust gaskets, could you describe the
> > difference in sound between a exhaust leak and a valve making
noise?
> >
> > I have a "tick" that you only hear under acceleration, doesnt
change
> > with engine temp, and is quiet at idle or cruising rpms.  It also
> > goes away as you approach the 4K rpm range during a hard
> > acceleration.  Im leaning towards a gasket leak... any thoughts...
> > advice?
> >
> > Ron
>






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