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Re: Oil in Exhaust!?


On 16 Feb 99, at 12:51, Jacob Schroeder wrote:
 
> After looking at my engine again, inside the pipes is a black substance 
> that i can wipe with my finger, but it's not what i'd call a liquid, it 
> seems more or less to be a filmy residue, is that the condensate mixed 
> with carbon that you are referring too.  Like i said, i am new at this, 
> and i know that oil shouldn't be in the tailpipes, but when the engine 
> is running, i looks like oil because it is more "liquidy", but i can see 
> how it can be carbon, but how much carbon buildup in the exhaust pipe is 
> normal? 

The answer is that a normal amount is okay, but too much is too much. 
How you learn to tell©rfùference is the hard part. Probably the 
best way is to stop worrying about it and get one of the many 
automotive books that has color pictures of spark plugs. Then remove 
yours and compare the color of your insulator to those in the 
pictures. That will give you a better idea of how your engine is 
doing.

> I also have another question, in Jon Muir's book, he says something 
> about how there is no real "procedure" so to speak of how to break-in a 
> new VW eninge, nothing besides the usual driving techniques such as no 
> fast starts, no lugging the engine and so on.  However, in the thin red 
> book i also have i think it is called "How to rebuilt an Air-cooled VW 
> engine", or something to that effect, the author says that the engine 
> should be ran at a certain RPM (don't know it off the top of my head) 
> for twenty minutes, then taken for a drive where you perform a series of 
> accelerate/decelerate patterns using 3/4 throttle.  Now, i don't see any 
> harm in really doing a break-in procedure over not doing one, but is it 
> really necessary, 

Like you say, being careful can't hurt, but when you really aren't 
sure what "being careful" consists of then this suddenly becomes 
complicated. Here are some rules of thumb for good engine treatment.

Start your engine first then put on your seat belts; this gives time 
for oil to reach all the bearings before you put a load on it. Don't 
depress the clutch when you start the engine because this puts thrust 
on the crank before there is oil at the thrust bearing.

Don't warm up the engine for more that a minute before driving. This 
wastes gas, runs the engine rich for too long, and is not as 
effective at warming up the engine as easy driving.

Don't run the engine at full load or high RPM before it is fully 
warmed up.

Adjust your valves (.004/.006") every 6000 miles and change your oil 
every 3-4000 miles. If you have a full flow filter, you can go 
longer.

Listen, feel, observe. If something changes, it means that something 
needs attention. D·.Wfuse your wants with your car's needs.

Jim
-
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
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