Re: Engine Still Knocking 4kq

[Luis Marques <marques@rtis.ray.com>]

Could it be that the knocking is the clasic vacuum pump rod?  This pump
runs off a camshaft lobe.  The way to check it is to remove the pump
from the cylinder head (only two nuts and an o-ring holding it in
place), remove the rod that goes into the cylinder head, and reattach
the pump.  If the noise disapears, bingo! Replacement O-rings are
availabe at the dealer and are not expensive.
HTH 

Luis Marques
'87 4kcsq (with no vacuum pump)

David Thoresen <epicfoto@lava.net> wrote:
> I checked everything and the knocking is getting worse... even when 
> idling and standing still it will make a knocking noise, it seems to 
> be coming from the cylinders around the middle of the engine...  
> If I rev the engine it will go away or get worse (sometimes) then 
> come back, other times  it will not knock at all...  when it does it
> does get pretty loud.  It does not sound like a valve problem,  more
> like a loose piece of metal banging against metal.