L36 Guys with Engine Cleaner - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-09-2005, 02:48 AM   #1
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Default L36 Guys with Engine Cleaner

Where can I pour some Seafoam into a vacum line? Where is the line at?
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Old 01-09-2005, 10:07 AM   #2
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You know where your PCV Valve is? That is a good place, and since you have vacuum operated brakes, you can also do it in your break booster line [the biggest vacuum line, going to your MC]. But, for us 88-91 guys, it'* the PCV Valve for us.


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Old 01-09-2005, 11:52 AM   #3
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I havent really looked yet, but there is only one line coming from the mastercylinder that goes to the throttle body? That should be easy enough. Any special tools to remove it, or just pry it off?
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Old 01-09-2005, 12:02 PM   #4
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Umm.. on your car, I don't know. But there is only one big large rubber line going to the MC from the engine.. i'd say that'* the vacuum line. Pry it off at the MC, get a funnel, and pour it in with the engine running. Pour in a little bit at a time, until you have only 3/4 or 1/2 of the bottle remaining [depending on how long it'* been since the last time you "seafoamed"]. If this is your first time, I recommend using half the bottle in the vacuum line. Then put the rest in your gas tank. I would put it in with a 1/3 or less of a tank, that way it is more concentrated. Seafoam isn't as harmful as injector/fuel system cleaner, so don't worry about it harming your fuel pump.


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Old 01-12-2005, 09:44 PM   #5
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hey that seafoam is the best stuff in the world you dont even need a funnel all you have to do is remove ANY vaccum line (they all end up at the same place) stick the line in the bottle and let'er chug it! i had an 84 Grand Prix that felt like it was gonna die i put 1 bottle of seafoam in it i dont think the thing ran any better when it was new!
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