Which Vacuum line for seafoam?
#21
12-21-2009, 09:47 PM
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I'm sorry but I will never jump on the Seafoam train. For upper engine clean, I will always use the water treatment which is free and Chevron FI Techron for the fuel system.
In the past 20 years, I had never done a visual check of before and after a water treatment but since joining this forum and seeing all the hoopla about Seafoam, I did do a before and after on my 96 Platinum. I knew, in theory, it worked well but this was the first time I saw what it actually did.
First I took the intake manifold off to do the PVC system so I inspected the heads of the intake valves which were very crusty with carbon buildup(155K miles). After I got it back together and warmed up to full temp, I continued. I hooked up a vacuum line to the tree and had a gallon of water and put the vacuum line in the gallon jug with the engine at 3000rpm and let it injest water a bit at a time. The entire gallon took about 20 minutes. For those who think,"oh my god, you'll hydrolock your engine like that!", it is impossible to hydrolock an engine this way. There is no way to pull in that much water through a vacuum line.
It just does the exact same thing that Seafoam does just for free. You have valve heads and pistons at normal operating temps(very hot) and you introduce a cold liquid which turns to steam. This shock cools the carbon on the valve heads and piston tops and causes the carbon to break free and be injested by the engine and blown out the exhaust.
After running a gallon of FREE water through the engine, I pulled the intake manifold again and looked at the the intake valve heads. They were now perfectly clean, as if they had been cleaned by a brush wheel on a bench grinder.
Keep spending $10-12 per bottle on Seafoam if you want, I'll keep using water.
In the past 20 years, I had never done a visual check of before and after a water treatment but since joining this forum and seeing all the hoopla about Seafoam, I did do a before and after on my 96 Platinum. I knew, in theory, it worked well but this was the first time I saw what it actually did.
First I took the intake manifold off to do the PVC system so I inspected the heads of the intake valves which were very crusty with carbon buildup(155K miles). After I got it back together and warmed up to full temp, I continued. I hooked up a vacuum line to the tree and had a gallon of water and put the vacuum line in the gallon jug with the engine at 3000rpm and let it injest water a bit at a time. The entire gallon took about 20 minutes. For those who think,"oh my god, you'll hydrolock your engine like that!", it is impossible to hydrolock an engine this way. There is no way to pull in that much water through a vacuum line.
It just does the exact same thing that Seafoam does just for free. You have valve heads and pistons at normal operating temps(very hot) and you introduce a cold liquid which turns to steam. This shock cools the carbon on the valve heads and piston tops and causes the carbon to break free and be injested by the engine and blown out the exhaust.
After running a gallon of FREE water through the engine, I pulled the intake manifold again and looked at the the intake valve heads. They were now perfectly clean, as if they had been cleaned by a brush wheel on a bench grinder.
Keep spending $10-12 per bottle on Seafoam if you want, I'll keep using water.
Last edited by schigara; 12-21-2009 at 11:08 PM.
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