My ES350 has developed an unusual sound. With only 10,000 miles on it, and
burning Premium (what a misnomer) gasoline, it is making a ticking sound
when I accelerate. The sound was not noticed until it got cold here in
Florida and the AC was turned off.
Also, the sound is loudest when the engine is cold. When the temp reaches
normal, the sound is barely audible. It is also most noticeable when
accelerating up a hill.
The tick-tick sound reminds me of the ping we heard due to pre-ignition on
the old cars. That is a sound that I haven't heard in years. Also, I
recall a similar sound due to valve noise on the old OHV engines.
I thought that the new computer controlled engines contained a "noise
detector" that adjusted the timing or something to prevent that problem.
Does anyone have any experience with this condition? I have an
appointment
with the dealer in a few days, but feel that they are going to ignore the
problem and tell me that it is "natural" or some such thing.
Regards,
Graybeard
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