1983 5000 Turbo gas

[Huw Powell]

> > help about using will be appreciated).  I have the car not driving since
> > the litle tube coming up towards the hood started emitting hot exhaust.  I
> > assume this was designed as a telltale item for problem with the turbo seal.
> > ...
> 
> Many cars from that vintage have a metal tube that is plumbed into
> the exhaust system prior to the catalytic convertor.  It is supposed
> to be capped shut with a cover.  The purpose is to connect a CO analyzer
> to test the exhaust gas before the catalyst during diagnostics.  If
> this is the tube you're referring to and it's missing the cap, just
> find an appropriate cap and close it up.

> Huw - The tube was never hot (best I can remember) and did not seem to have
> pressure in it, until what ever caused a problem.  Now it has hot gas and
> pressure coming out, so it melted away the rubber cap on it.  The pressure
> is so much tht I could not clamp another cap on and have it stay.  The tube
> seems to come out of the bottom of the turbo, if I am remebering correctly.
>  I was led to believe that it was uased to be an indication of a bad
> internal seal on the turbo.  Tex.

John Larson wrote:
> 
> I'd look for the reason the cap is missing. Most frequent cause is a
> plugged catalytic converter. A backpressure test is in order. John

I think John has nailed it.  As i was copying peoples replies and
reading the one in the middle from Tex I thought about *how* pressure
coulod be at that tube, which is after the turbocharger where there
should be very little pressure.

Clogged cat moves to the top of the list.   Open her up and take a look!

-- 
Huw Powell

http://www.humanspeakers.com

http://www.humanthoughts.org