Guest Teamsterdug Posted September 30, 2004 Share Posted September 30, 2004 I had my distributor (1966 Buick 340c.i.) laying on the workbench today while installing Petronix upgrades within it. I noticed a few drops of some red fluid which appears to be transmission fluid that had dripped onto the bench. After a bit of investigation I found that it had dripped out of my vacuum advance. I DO NOT UNDERSTAND HOW THAT COULD HAVE GOTTEN IN THERE! The hose, of course, goes from the vacuum advance to the base of the Carter AFB carb. I've had the car for about 3 years. It is a very low mileage car. Could someone had purposely placed some kind of lube inside of it? If so...why? How could it have possibly got in there otherwise? So confused. Link to comment Share on other sites More sharing options...
Coley Posted September 30, 2004 Share Posted September 30, 2004 What you are seeing is just the common condensed gasoline vapors that are pulled into the advance when the engine is shut down. It is only a small amount each time the engine is run, but it will accumulate over time. Ever notice the same red color around a carb base that has a very small leak? Just drain it out and don't worry about it..... Link to comment Share on other sites More sharing options...
Guest Teamsterdug Posted September 30, 2004 Share Posted September 30, 2004 Thanks for the info. Sounds logical. I'm relieved. Link to comment Share on other sites More sharing options...
Jay Wolf Posted September 30, 2004 Share Posted September 30, 2004 I have also found automatic transmission fluid on automatic cars with the Vacuum modulator bad on the transmission.Check the diaphram on your modulator. Link to comment Share on other sites More sharing options...
Guest Teamsterdug Posted October 2, 2004 Share Posted October 2, 2004 Jay, This makes sense too. Feel like giving me any suggestions on how to check the diaphram in the modulator? It has the 400 automatic transmission. Is this something that would be easy to spot or do I need a vacuum tester to use on it? I know! I know! Go ahead and say it... "Its in the book dummy!"Thanks for the input. Link to comment Share on other sites More sharing options...
Guest JT Posted October 2, 2004 Share Posted October 2, 2004 One way to check it is with a mightyvac if you have one handy. If the modulator is bad you should be having some hard shifts and maybe seeing smoke from the tailpipe along with transmission fluid loss. Link to comment Share on other sites More sharing options...
Jay Wolf Posted October 2, 2004 Share Posted October 2, 2004 Mine was leaking bad and easy to find. It filled the vacuum advance on the distributor.I would put a vacuum with a clear line on the modulator and check for fluid in the line. Link to comment Share on other sites More sharing options...
Coley Posted October 2, 2004 Share Posted October 2, 2004 Usually a leaking modulator will have fluid in the line when you pull it off the modulator.... Link to comment Share on other sites More sharing options...
Guest Teamsterdug Posted October 3, 2004 Share Posted October 3, 2004 Thanks for all of the suggestions guys. It should be easy enough to find out if the modulator is the problem. I really liked the suggestion to use a clear line on the modulator! Sometimes the most affective solutions are so-o-o-o simple. I never would have thought of that. Link to comment Share on other sites More sharing options...
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