[DMCForum] Strange noise in enginebay
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[DMCForum] Strange noise in enginebay



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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