sucking noise from center of engine on CGT

[Charlie Smith]

Earlier, Kneale Brownson wrote:
> 
> My wife's '86 4Kq (similar engine?) developed a split in the multi-outlet 
> hose that goes between the valve cover, the ISV and, I think, the crankcase 
> ventilator tube.  Anyway, the split was on the bottom, where it's difficult 
> to feel and impossible to see.  The connections from the hose all were 
> tight but the split was making a big sucking noise that eventually went to 
> quite a whistle.
  
> At 09:54 PM 12/26/2000 -0700, Jeremiah Curry wrote:
> 
> >My 85 CGT is making a sucking type noise from center of the engine, between
> >the intake manifold and the valve cover kind of by were the warm up injector
> >thing and vacume tubes are. I can't find any loose vacume tubes in that
> >area, and the power seems to be down a bit as well.  Any ideas?
> >
> >Jeremiah Curry

On the 5kCSTQ, the molded hose that goes from the crankcase vent, which
is low on the left side rear of the engine (viewed from the driver's seat),
up to the intake manifold area is prone to get weak and develop splits on
the bottom like Kneale says.  I had this go out three times in 200K miles 
on my '86 5kCSTQ.  

Another symptom not mentioned, is the car will die at idle and you'll 
have to keep the revs up to keep it from dying.  This is because of the 
unmetered air entering the system which makes it go too lean to idle.

    - Charlie


  Charlie Smith   charlie at elektro.cmhnet.org  614-471-1418  
  http://elektro.cmhnet.org/~charlie   Columbus Ohio   USA

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