RE: [Chrysler300] Pinging & Timing

["Melton, Ray" <rmelton@xxxx>]

Mike, I didn't know there were any more of us old "Maico Break-O" riders
left out there! 

I've heard that the "water down the throat" method works by rapidly cooling
the carbon-encrusted surfaces of the piston and head, and the difference in
thermal expansion between the two materials dislodges the crusts. The
method is not without some danger, though -- the rapid cooling can distort
some of the metals, leading to cracks or warpage, particularly on the hot
intake valve the water just passed over; and the dislodged carbon pieces can
get caught in the piston ring clearances, degrading the compression seal.
If the carbon pieces are not immediately expelled from the cylinder, they
can also become temporarily embedded in an exhaust valve face or seat, which
holds the valve open a bit and can cause a leak, as well as possibly leading
to a burned valve as the chunk prevents the valve from closing fully and
transferring its heat to the water- (or air-) cooled head.
Ray Melton

> ----------
> From: Mike[SMTP:moparmike@xxxx]
> Sent: Tuesday, September 18, 2001 3:56 PM
> To: Herman; chrysler300@xxxxxxxxxxxxxxx
> Subject: Re: [Chrysler300] Pinging & Timing
> 
> I've seen old timers do this(and I've done it myself).
> Usually about "one coke bottle full" will do the job, just dribble it in 
> with the revs kept up, to keep things from drowning out.
> It won't hurt any thing & it just might help.
> Once, on a camping trip, I forded a stream on my old Maico two stroke 
> motorcycle & got the air cleaner partially submerged(water was spitting
> out 
> the exhaust pipe). Had occaision to take the head off a few days later & 
> the insides were completely devoid of any carbon buildup.
> Mike
> 
> At 10:50 PM 9/18/01 +0200, Herman wrote:
> >I
> >
> >This, of course, is a very lowbuck solution...!
> >I've never tried this myself yet, but you can 'trickle' some drops of
> >water in your carb with the engine at 2500 rpm or higher.
> 
> 
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