Re: Engine Knock Right at Engine Start only!!

"Dunamis" <u43397@[EMAIL PROTECTED]
> wrote in message 
news:83af08b03e6ec@[EMAIL PROTECTED]
> I'm trying to get as much research for this as 
> I possibly can before taking
> action. Any info you guys could provide would 
> be greatly appreciated!
>
> My Situation:
>
> Sometimes when I go to start my truck, I will 
> turn the engine over and when
> it fires up there are a series of 4 knocks and 
> then it goes away. Each and
> every time it does it, it's four knocks. It 
> usually happens after the engine
> has been sitting for the night.

I know this sounds kind of weird----but have you 
had any work done on the AC?
If there is a bit too much oil in the AC system, 
it will settle in the pump lower
cylinder overnight, and knock a few times on 
start-up.  Had it happen on my
94 K1500.

Bill