Re: Cats and bad rings

[kdbinney@juno.com (Kyle D Binney)]

On Fri, 16 May 1997 09:39:14 -0700 VW Nut <scirocco@speed-racer.com>
writes:
>Hi Folks,
>
>Sorry about that empty message yesterday. My mailer SUX.
>Didn't mean to offend you OneFastVW! O.k. I'll try this again,
>
>I know its a well known fact that the stock 16v downpipe and cat
>isn't the strongest, but how long have they lasted for you
>folks that have had them fail.. Just want to know if I
>should be expecting such a surprise soon. 

Im told that the stock flex downpipe is good as long as you dont back
into anything.  The flex coupling will not withstand any considerable
amount of force.  apparently snowbanks in the winter kill a lot of these
pipes around here.  other than that they are pretty damn solid.  even wit
a pathetically blown front motor mount My friends held up fine.  Im
pretty sure he finally replaced it.  Keep in mind that the
manifold/downpipe/cat combo holds up against headers on a dyno and is
definitely more durable then them.

>
>Now for the sad part..I know proud Scirocco owners wouldn't 
>have their car burning oil but has anyone ruined their cat by 
>burning oil into it. You see, previous owner blew the engine (timing
>belt) 4 years ago. Bought the car for a song. New head but I didn't 
>have the $$$ to rebuild the bottom end and now I know the piston 
>rings that are not sealing the best according to a leakdown. Not
>my doing - I change the oil every 3k. Previous owner was a dork! 
>I know the rings need replacing but I'm biding my time until I 
>graduate, get a job and can afford a new engine. 
>SOOOO, will burning quite a bit of oil (say 1 litre on 1000km
>highway runs at 5000 rpm) kill my cat. I'd keep the rev's down
>but you know that close-ratio 5th! The funny thing is the car
>doesn't smoke (blue) at the back as a friend verified driving
>behind me. If I kill it I guess I'll put in a cheapo downpipe
>and straight pipe until I fix the engine! I'd keep the cat
>otherwise. OR someone could sell my their engine for cheap! 
>Or install a wide-ratio 5th...
>
>Thanks for any comments, tips, insults for being an
>oil-burner, etc...

Never heard of oil killing a cat, a really rich/lean mixture will melt
them but I dont think oil has a signifigant impact.

>
>K.B.
>'88 16v
>scirocco@speed-racer.com
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Kyle 
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