Seafoam = Replace Cat, O2 sensor, etc.?
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Joined: Dec 2005
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From: Eagle Mountain, UT
Seafoam = Replace Cat, O2 sensor, etc.?
I've done a couple of searches on this but seem to find really mixed responses. I have a '99 Accord EX I-4 which runs fine, but the valves are just a little bit noisy so I figure I'll do a valve adjustment on it since it's got 101K on it anyway. I read on this forum about seafoam which can clean up some of the carbon and sludge buildup and thought it couldn't hurt to try it. But I read that it can jack up your O2 sensor, CAT, and other things. Well hell if I want to replace a bunch of equipment just to stop a little clicking, that if I weren't so dang picky I probably wouldn't even notice. Any opinions on this? Should I maybe just apply to crankcase and not to fuel system to avoid some of the problems I might encounter like the sensors and what not?
lots and lots of fail
Joined: Dec 1999
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From: Deeeeeeeeeeeeeeetroit
I replaced it at 200k 
h:
Chidori-chan :love:
Joined: May 2002
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From: So Cal
just be careful with the seafoam... put in a lil at a time thru the pcv valve line... first time i used seafoam, i put in too much at one time and it killed my distributor... also, i now put in just 1/4 of the can and not 1/3 as recommended on the can
ew n!gg@ u g@y
Joined: Apr 2006
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From: inside a house
i love using seafoam. i actually did it in my car this mornin after my oil change. smoke everywhere 
my neighbors called the cops cuz they thought my car was on fire, it was pretty histerical once i todl the fire dept what i was doing
my neighbors called the cops cuz they thought my car was on fire, it was pretty histerical once i todl the fire dept what i was doing
Chidori-chan :love:
Joined: May 2002
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From: So Cal
u're supposed to use it BEFORE an oil change.. all the gunk and sh*t tht comes off during the seafoam usage will fall into the oil... thus, u need to change the oil after using seafoam
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Joined: Apr 2004
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Clean or change out the spark plugs after seafoaming, you'll know why when you pull them.
It isn't seafoam that damages the O2 sensors, it's all of the crap in the intake manifold and combustion chamber floating down the exhaust that clogs them up.
I've read that many people just simply remove the O2 sensors, clean it out with either electrical cleaner or carb cleaner, and throw it back in with no problems. I, personally, saved my old O2 sensors just for this cause
It isn't seafoam that damages the O2 sensors, it's all of the crap in the intake manifold and combustion chamber floating down the exhaust that clogs them up.
I've read that many people just simply remove the O2 sensors, clean it out with either electrical cleaner or carb cleaner, and throw it back in with no problems. I, personally, saved my old O2 sensors just for this cause
ew n!gg@ u g@y
Joined: Apr 2006
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From: inside a house