I need help in determining if I have a bigger problem then I just
experienced. I recently had a fan clutch failure which destroyed the
radiator, fan, fan pulley, $$$$. The failure happened when the engine
was at high (3.5K) RPM, the truck actually rocked during the failure.
The problem I have now after the repair is a whistle sound that's
coming from the front of the engine. With the fan belt off, the
whistle sound increases with engine rpm. Beside the noise, the truck
runs just fine. I have done all the obvious stuff so this is really
strange to me. I had others listen to the whistle, but they have no
ideal what it could be. Did I damage something else? Could the timing
chain be making this new sound? Does anybody have any thoughts? 1989
Chevy K1500 with less then 2K mile on the new 383 engine.
Water pump runs off of the "fan belt" as he calls it, properly referred to
as the serpentine belt. If it's making noise with the belt OFF, the water
pump isn't spinning, hence it couldn't be the water pump making the noise.
Guess that answers it. Kind of thought of the answer after I posted. I meant
more like "how could I look at something and get the right name?"
My thought is, once it turns back on it's self, it's now a serpentine belt.
I think your right about the year, a friend of mine had an 87' blazer with
fan belts, and I have an 88' S10 with serpentine.
A V-belt looks like a Vee.
My wife's 86 fs truck has a V-belt for the power steering and a
multi-vee (often called poly-vee) belt for the alternator.
It became known as surpentine because of the path the belt takes. The
serpentine belt uses a belt-breaker adjustment pulley instead of the
old fashioned way of moving the alternator or power steering pump to
adjust the belt.
Anyway, I thought it might be the water pump on my neighbour's truck
but he swears it is a leak in the exhaust manifold. You would think
the noise you might hear wouldn't be a whistle if that were the case.
Must be catching because my wife's truck has a faint whistle now too.
Maybe a vacuum leak?
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