Re: Friggin Knocking

[16v Jason <jason@scirocco.org>]

At 07:03 PM 5/1/2000 , Nathan Malone wrote:
>Greetings All,
>For the last maybe two months my Rocc has been
>pinging badly. I have not had any problem prior to
>this. I still run high octane fuel as I always
>have. I have given it a tune up  and nothing
>changed. I re-timed it and then retarded the
>timing at the distributor, and that didnt fix it,
>I then tried retarding it at the cam and that
>didn't  do anything, I even tried retarding it at
>both cam and distributor, the engine could barely
>idle and it didn't stop.   I am wondering is there
>anything else that would cause severe pinging?

Yep.  Large amounts of carbon deposits will raise the compression ratio to 
the point that retarding the timing won't help.  If you regularly redline 
your car and don't lug around under heavy throttle, this won't be the problem.

The other thing that causes detonation is excessive heat.  If the car only 
pings when warmed up, you may have a blockage in some of the coolant 
passages, causing one (or more) of the cylinders to overheat.

Jason




----------
1987 Scirocco 16v
1989 Mercedes 190E Sport Euro


http://members.aol.com/rocco16v  

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