Re: [DML] Strange noise in enginebay

[Ryan Stroschein <ryan_stroschein@xxxx>]

Something similar happened to me in Memphis last summer. One of the Fuel Injectors had popped out
slightly. The noise went away while on the highway, but at slower speeds/idle there was a very
loud hissing. Jim Reeve spotted the problem and popping it back into place fixed it. Just
something easy to check for.

Ryan


--- Jan van de Wouw <jvdwouw@xxxx> wrote:
> Hi,
> 
> While driving this afternoon all of a sudden I heard a strange
> noise from the back, it sounded like a sort of "shrieky whistle"
> and increased with giving more throttle.
> 
> First thing that came to mind was the blowoff from the cooling,
> caused by a blown head gasket, so I stopped immediately...
> My coolant was still in the system, under pressure and the
> blowoff hose was dry. My oillevel was still right and there
> was no foam evident on the oil...
> I guess I can rule out the headgasket...
> The temp on the Gauge was on the "7:30"position, where it's been
> all day (runnning the A/C and driving no faster than 50mph...
> 
> When I listen in the engine bay and give throttle at the spool
> the sound seems to come from the left front, with the covers
> down it sounds like it's coming from the right rear :-S
> 
> My belts are both intact and under the right tension, the fins
> on my Alternator are all straight and don't hit anything...
> 
> Could this "whislte" come from an exhaust gasket?
> I have a leaky gastket between the right hand manifold and block
> nearest the X-over pipe (will be fixed after next weekend),
> could a gasket be "whistling"?
> 
> I really don't feel comfortable with my car right now; I drove it
> home as it was only 20 miles, so a tow would be easy if neccesary.
> The sound went away after a couple of miles, but returned when
> I drove into my neighbourhood...
> 
> Next weekend there's an event I'm supposed to go to, but that's
> 125 miles from here, so I'd like to know what this could have been
> before I drive off, running the risk of something REALLY going kaput.
> 
> I'm under my car anyway next wednesday, as I'm installing an extra speed
> sensor on the driveshaft then, so I'd like to know where I should look.
> 
> It'd be a real shame if I had to get into my '92 Nissan next week,
> to drive around next to cars that are 10 to 15 years older :-(
> 
> Thanks up front,
> 
> JAN van de Wouw
> Thinking Different... Using a Mac...
> Living the Dream... Driving a DeLorean...
> 
> DMC-12 "Dagger" since Sep. 2000
> 100NX "Saphire" since Nov. 2002
> 
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> 
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