On Jun 15, 8:05 pm, klin...@[EMAIL PROTECTED]
wrote:
> Hey, I've got an Oldsmobile Delta 88 Royal, 1988, 3800 VIN C engine,
> 125,000 miles. I had all of the fluids changed, transmission and
> radiator powerflushed, etc about 1000 miles ago. Before all of the
> fluid flushes, I also Seafoamed the engine, which made it run a LOT
> smoother, but I don't think it contributes too much to this problem
> (or maybe it does, who knows?).
>
> After a semi-rough start today (where you turn the key and it barely
> catches, putters, and complains until it grabs a good idle 5 seconds
> later), I noticed the engine makes quite a loud rattle noise at idle
> rpm. Right after I start it, sitting at lights (in neutral or drive,
> doesn't matter), or after I park, I hear the noise. If I step on the
> gas pedal AT ALL, the noise goes completely away. It also takes a
> second or two for it to come back after I let off the gas (but it does
> come back if I let of the gas and let it coast). It's loud enough to
> get other drivers to notice it when I'm driving, but it doesn't seem
> to affect the performance of the vehicle at all.
>
> I tried the "screwdriver-as-a-stethoscope" test, and I didn't really
> hear anything from the alternator, but I do hear it loudly from either
> the area right below the power steering fluid reservoir (is the water
> pump?), and on the rear valve casing, louder on the passenger side
> (towards the alternator/etc). I know my car has camshaft sensor
> problems (as in, there's no magnet left...:( ), but that doesn't
> really cause any problems, besides the minor inconvenience of having
> to let it idle a bit after cold starts (or else it suffers from gas
> pedal "lag" for the first couple of minutes). This noise I'm hearing
> is completely new, and I'm hoping it's something that won't cost an
> arm and a leg, like the harmonic balancer pulley. I can't really
> afford to have them pull the engine and replace the timing chain
> (though, that'd be a good time to get a new camshaft position magnet,
> whatev), but if that's the problem, I'd like to know.
>
> Anyone have any thoughts?
Replaced the belt. Not the belt...
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