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Re: The Famous Seafoam Treatment
Posted by BlaaSaab [Email] (more from BlaaSaab) on Sun, 14 Mar 2010 22:08:37
In Reply to: The Famous Seafoam Treatment, chaccof, Sun, 14 Mar 2010 15:21:22
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What year is your 9-3, and is it manual or automatic?
I recently tried this on my 2001 and had a bit of difficulty finding a good vacuum line to use. The Seafoam instructions tell you to find a line that distributes evenly to all cylinders, but my car's brake booster and two of the vacuum lines connect to the driver's side of the intake manifold, nearest to cylinder 4.
Meanwhile, the line that attached to the throttle body before the butterfly valve was no good because it wasn't under vacuum and blew bubbles in the Seafoam. I ended up disconnecting a line from the boost pressure solenoid at the firewall, which I could tell had vacuum, but I really wasn't sure if it distributed to all cylinders. It immediately made the car run badly due to the extra air, and it chugged even worse as soon as I dipped the line into the Seafoam, so I had to carefully work the throttle with one hand while submerging the line for only about a second at a time. It really wasn't a very fun experience.
One thing that's very easy to do on these cars is a Seafoam piston soak. Just pull the DI and spark plugs, then pour a bit into the cylinders and wait a couple hours. It gradually seeped past the rings, but visibly softened the carbon deposits on top of my pistons, and I think it may have eliminated the low compression in one of my cylinders.
posted by 98.111.34...
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