Will Seafoam down the throttle body destroy my O2 sensor?

[SquareRoot]

I'm wanting to remove some carbon deposits I saw on a few intake valves due to my recent intake gasket leak. That was with a carb, now it's efi. I damn sure don't want to ruin a new sensor.

Alternatively, is there a better way?

 

[Camar068]

I would say not, but just in case, read up a bit on their site or hell......give them a call. I love sea foam. Follow the directions if anything.

 

[Frankenchevy]

If you have a few miles on the self learning, you can put the system in open loop with learning turned down to zero. This will just tell it to refer to existing fuel tables without the use of sensor feedback.

Pull the O2 sensor and replace it with a plug and dump the seafoam.

Should be fine without any of those measures, though. I’ve put seafoam and other PEA type products down fuel injected engines before as have countless others with no ill effects.

although I get the paranoia with the new stuff, too.

 

[SirRobyn0]

No seafoam will not hurt your O2 sensor. We use it all the time at the shop and it's fine, however if the carbon is bad enough the carbon coming out will not do the O2 sensor any good. Honestly I'd just do the seafoam and forget it, but if your really concerned pick up an O2 bung and the auto parts store cost should be only a few dollars. pull the O2 install the bung, do the seafoam thing, then reinstall the O2 sensor.

 

[Rusty Nail]

Alternatively, is there a better way?

Dex?

Water?

Better gas lol?

 

[Crispy]

Never had an issue with seafoam messing anything up. Never concerned myself with what was coming out of the pipe but if these are new 02 sensors maybe pop in the old ones or a pipe plug.

 

[SquareRoot]

Thanks everyone. I'm going to play it safe and stick the ol pipe plug in the bung hole.

Easy enough 5 minute job.

 

[82sbshortbed]

Bung hole

Should just add to gas tank and let her rip.

You're not pouring it in the tb right? Maybe I read it wrong.

 

[80BrownK10]

Bung hole

Should just add to gas tank and let her rip.

You're not pouring it in the tb right? Maybe I read it wrong.

If I was trying to eliminate bad deposits I would pour it down the throttle body.

Or do it like this.

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Refer to this video for proper use of seafoam.

 

[SirRobyn0]

I didn't say this earlier because he was asking about seafoam, but water slowly drizzled in the intake is my favorite method, I've had it work when all else fails, but it's risky if you don't know how to do it properly. Back to seafoam, in the tank is great for periodic maintenance or for loosening deposits inside carbs or injectors, but direct application down the carb or throttle body is the only way it is effective against tough carbon deposits on the valves.