On May 5, 9:19=A0pm, "Dunamis via CarKB.com" <u43397@[EMAIL PROTECTED]
> wrote:
> Not a "tick" or "rattle". If you knock on a desk or door with your
knuckle=
,
> that's the sound. I spoke with an old timer up in North Ga today that
has
> been the lead technician at his chevy dealership for forty years. I
descri=
bed
> the noise and circumstances in which the noise takes place. He said that
h=
is
> truck made that exact same noise on cold starts as well. He said his
truck=
ed
> started doing that @[EMAIL PROTECTED]
about 50K miles and now it has 300K and still makes
t=
he
> noise. HE said oil filters with check valves and radiator oil coolers
coul=
d
> easily cause the problem. He told me that if I wanted to buy an engine
he
> could gladly sell me one, but he told me that he would hate to see me
wast=
e
> money on an engine when the engine I have has a knock that is little
more
> than an annoyance on cold starts. He said use 20 W30 ( thicker oil) and
ST=
P
> and the noise should go away. HE also recommended marvel mystery oil.
>
> --
> Message posted via
CarKB.comhttp://www.carkb.com/Uwe/Forums.aspx/chevrolet=
-trucks/200805/1
Then thats what Id do. Go with a heavier oil, add a little additive,
and ride it out. Your guy in Ga is describing a pressure problem. Once
the engine has run for a few seconds the pressure builds and the knock
goes away. Just remember, this may be an annoyance, but it "is" a weak
spot in the engine. It may run another 100,000 miles before she blows,
just be carefull not to be drag racing between stoplights and it may
run a long time. Oil pressure is the life of an engine, even for a few
seconds rattle, on a cold start, can be doing damage, may not get you
now, but it will eventually. Change the oil, put in the additive, and
good luck!
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