[DML] Re: Unusual Vacuum Leak

["content22207" <brobertson@xxxxxxxxxxxx>]

Actually the passenger intake rail feeds cylinders 4-6. Minor point,
but the owner might not notice if he examined passenger plugs for
leak. I've uploaded a pic of vacuum leak damaged plugs to #5939's
photo album if anyone's curious what it does (just like dialing up
oxygen on an acetylene torch).

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, "David Teitelbaum" <jtrealty@xxxx> wrote:
> I am working on another car today and had to remove the intake
> manifold. After I removed it I noticed the knock-out plug on the front
> right side was deformed to the point that you could see a large leak.
> I figured out that at one point someone must have used too long a
> screw to fasten the air cleaner on. If you do that in the front-most
> position  the screw will touch the knock-out plug and bend it. This is
> one you could never see until you remove the intake manifold. It is
> also a lesson to always try to use the correct length bolts. Sometimes
> things are held together with varying length bolts. You MUST note the
> correct positions for each so you do not put a long one in a short
> spot and vice versa. In this case even if you put the correct bolt in
> after using the wrong bolt the damage will be done. A quick way to
> inspect for this leak is to remove the "W" pipe and while having
> someone hold a flash light pointing at the knock-out plug look inside
> for any sign of light. This will cause the whole right side to run
> lean, especially the front cylinder. It will also keep you from
> getting the idle right or being able to properly set up the mixture.
> Another big problem area is the brass idle motor pipe where it goes
> into the mixture unit. If not done carefully the "O" ring seal gets
> damaged and leaks. I also see a lot of cars that do not have a plug in
> the hole over the mixture screw. I cannot overstress the importance of
> finding and fixing ALL of the  vacuum leaks if you want to get the
> motor to run right.
> David Teitelbaum
> vin 10757




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