I have a '99 4x4 with a 3.9 V6 and 13,600 miles.
Some time ago, it started "pinging" around 1600 RPM. Eventually, it also
pinged around
3000, then spread almost any RPM. It starts after about 20 minutes of
driving and only
pings while moving, never in neutral. The loudness has increased to
unbearable levels
(sounds like it's all gonna fall apart). I call it knocking or rattling
now.
I've had it in 3 times now. The first time, they adjusted the timing, the
second time
they rerouted the wires and the third time (today), the Chrysler rep was
there and
told them to pour "something" in it. The shop foreman took a ride this
morning and said
he heard 2 things: 1) pinging around 3000 2) lifter roller rattling at
1600.
I've read a recent thread about pinging and am tempted to try the higher
octane idea,
but I'm not confident that will solve the problem. The Foreman claimed
that they fixed
the pinging but there's nothing to be done about the rattle. It's a
result of normal
break-in wear on the rollers and that if they're replaced, they'll just
do it again
in another 20,000 miles. They refuse to replace them. They claim to get a
lot of trucks
back in with this problem and there's no harm being done and no
resolution available.
My problem is, there's no joy left in driving it with that noise and
there's no way
any body would ever buy it.
Has anyone had any experience with this problem or heard this "excuse"
from the dealer?
Thanks!
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