Yes , most older and some newer vehicles have this trait , the cooler , more condensed air does it .
Water injection is an old thing , it does seem to work but again , in your Mercedes Diesel , only a very *tiny* bit of mist else you risk serious engine damage .
Old air cooled anythings run WAY better in the fog , get higher fuel mileage too .
-Nate
Brad wrote:
>
> FWIW, I've noticed that on heavy fog nights, my 300D has significantly more power. I believe there may be thread in this forum about introducing fine water mist, somewhere in the past.
>
> (In addition, I distinctly remember a thread about introducing propane.) I wonder if the diesels would operate on natural gas...it would be significantly less expensive and cleaner burning.
>
>
>
> ________________________________
> From: Nate <vwnate1@...>
> To: diesel_mercedes@yahoogroups.com
> Sent: Saturday, February 25, 2012 3:57 PM
> Subject: [diesel_mercedes] Re : Low Compression De-Coking Engines
>
>
> Sorry ;
>
> No one replied so I thought it wasn't important .
>
> Be aware that this isn't what I'd do to a Mercedes 20:1 Compression Ratio engine .
>
> Anyways : operate engine until it's fully warmed up to operating temperature , remove the air cleaner and take a spray bottle full of water , set it to the 'fine mist ' spray , rev. the engine to 3,000 RPM and , whilst holding the throttle , begin gently spraying in a fine mist of the clean water ~ you'll hear the engine miss and see large clouds of black or grey smoke emit from the exhaust , DO NOT release the throttle but *do* stop spraying if the engine drops a lot of RPM , it'll clear out and climb back to to 3 K RPM in a moment .
>
> What happens is : the fine mist of water hits the red hot carbon and *instantly* flashes into steam , blowing the accumulated carbon off the piston crown and combustion chamber (spark plugs too) so it can go whistling out the exhaust , you'll see red hot glowing sparks sometimes .
>
> This is why , when you take apart an engine that blew a head gasket or cracked a cylinder head , one or more cylinders will be suspiciously clean ~ the leaked in coolant blew out the normal carbon as the engine died .
>
> Water , even in fine mist , isn't compressible so inducing it into a high compression engine , can crack the pistons or bend the connecting rods .
>
> The older Garage mechanics who weren't well trained , would simply up end a 6 oz. Coke bottle of water down the open intake whist Granny's Oldslowmobile was wailing along in protest with the throttle pinned ~ folks over 50 may remember the clouds of smoke belching from the back end of a '55 Caddy in the Service Bay of the local Sinclair Station , if the Mechanic was lucky , the car suffered no damage and ran *MUCH* better for another year or two .
>
> If too much water went in and the engine hydro - locked , he simply told them it was time for a rebuilt engine....
>
> I prefer the " Italian Tune Up " on my old Mercedes because it works the same and I like to think I keep my cars in sufficiently good repair that a 100 + MPH run @ 0-Dark:30 is safer .
>
> If you're the gambling typ , a -tiny- mist in your Mercedes might work the same way .
>
> YMMV , AFAIK , other excuses go here .
>
> -Nate
> Alan wrote:
> >
> > On Jan 16, 2012, at 6:29 AM, Nate wrote:
> > > I recently de coked an incredibly oil fouled engine using an old method learned from a Journeyman Mechanic working on a 1952 Oldslowmobile Rocket 88 that Granny had nearly ruined by never exceeding 25 MPH ~ I've tweaked the methodology a little bit but it still works a treat .
> >
> > Well don't keep us hanging..... How?!?!?!?!?!..... 8-)
> >
> > - Alan
> >
>
>
>
>
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