In a message dated 12/8/00 12:58:51 AM Pacific Standard Time,
[EMAIL PROTECTED] writes:
>
> I have a 91 Sentra with bumped up timing of to 15 degrees, unorthodox
> pulley,
> warm air intake and 2 inch catback exhaust, if that matters. When I first
> start the car and start to run, I get what sounds to me like valv clatter.
> It
> only happens for the first 2 or 3 minutes if that long upon
> acceleration.After the temperature needle starts to move, the clatter
> disappears. Never had a car ping on me before so do not believe that is it,
> due to the 91 or higher octane gas that is always put in the car. I do not
> have a tach, but noise usually occurs around 30 to 35 in second gear.
>
>
I'll bet where you live the weather has turned a lot colder and if that's so
unless your using a multi weight oil it (the oil) is not getting pumped up to
the top of the engine and is causing the problem, if your are using a multi
weight oil I'd guess you getting some miles on the engine and the clearances
in things like the oil pump are starting to open up just enough that its
causing just enough of a problem that it can't pump the oil fast enough when
the engine is cold to fill up all the voids in the engine until things get
warmed up, I wouldn't worry to much about it unless the noise is really bad,
once the engine gets up to operating temp the engine parts in the valve train
expand and fill the gap and things get close to speck again and the noise
goes away, or you may just need a valve lash adj. when was the last time you
adj.ed the valves? Or it could be a combo effect where just a little big of
each is adding to the problem, how often are you changing the oil and filter?
If you check your valves and there OK and your changing the oil and filter at
least every 3000 miles or sooner then just let the car idle a little more in
the mornings when you first start it up and take it easy on the gas pedal for
the first couple of blocks.
Ron
