Does anyone know if the seafoam engine treatment harmful to the cat?
Seafoam Harmful to Cat?
- Thread starter iixtremehansen
- Start date
Not the Catalytic Converter. If there is anything on the catalyst, it'll burn off with the SeaFoam.
It will straight f**k up your pet cat. Not that you could get Fluffy to drink it anyway.
Most of the time, if it does any damage at all, it's to your pre-cat O2 sensor. It contaminates it and makes it switch weird so you get a CEL.
It will straight f**k up your pet cat. Not that you could get Fluffy to drink it anyway.
Most of the time, if it does any damage at all, it's to your pre-cat O2 sensor. It contaminates it and makes it switch weird so you get a CEL.
So have you had experience using seafoam to get rid of a CAT CEL? I have a CEL saying that its my cat. I'm planning to put in an old o2 sensor while i run the seafoam for a little bit, but im hoping it would clean out my cat so i can pass smog in a month.
seafoam is for cleaning engine build up and carbon deposits on valves and the pistons. ive used before and it never threm a code. as for cleaning the cat, i dont know. but make sure the code is relating to the cat, sometimes it will be a cat code but it is thrown from another source. if you do the seafoam just make sure you regulate the flow so it doesnt kill the motor and do it outside( it will smoke alot out the exhaust) we do this type of service at my work all the time, never had any ill effects.
if you have a low efficency code i would change the 02s first.
The best way to use seafoam is to disconnect a main vacume line such as brake booster or pcv valve and let it suck it in all by it self. You will hae noticible results.
I did seafoam on my car (1/3 in brake boost vacuum line and 1/3 in gas tank) when it had around 160-170,000 miles on it. I blew the pre-cat O2 sensor within 30 seconds of driving 
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I'm thinking about doing it again. Rolled 200,000 2 weeks ago.
. I'm thinking about doing it again. Rolled 200,000 2 weeks ago.