mercedesbenzs55

I bought a bottle of seafoam for my S and am wondering if using to clean the engine would be safe for sensors, ect. Would it be possible to use it for the gas tank/transmission/crank case.

I've used it in all my past cars with good results.

just1time

You buy it before asking if its safe to use on the car? lol
The past few weeks on here has been really lively in the w221 forum cause of you...lol

The S class is very sensitive lady. Tiny changes can throw off sensors etc. user discretion is advised.

mercedesbenzs55

Thanks man, I feel we all make it lively I figured it wouldn't hurt to buy it. If I got a poor response about it on the forum then I can always use it on my Acura. Or use it to clean the 'Cedes injectors via the gas tank. I figure that is going to be safe enough.

Nuru

Note; using it to help clean a charcoal cannister or the outside of a caliper is way different than experimenting with your engine

xpl0sive

When I did my spark plugs I sprayed seafoam into the cylinders and let it sit. Of course I changed my oil afterwards too, since the seafoam will seep by the rings down into the crank case.

alx

I wouldn't put seafoam in an s221. And I love seafoam. You are better off putting a bottle of chevron techron in the tank and do some spirited driving.

I absolutely wouldn't put anything but recommended oil in crankcase either.

mercedesbenzs55

Xpl0, What is the use of letting them sit inside the cylinders?

Alx, doesn't seafoam have about the same affect/effect as the chevron techron?

xpl0sive

it breaks down carbon deposits on top of the pistons.

mercedesbenzs55

Is that a pic of our engine? I understand what seafoam does in the cylinders, but why let the liquid sit in the chamber vs. having it be slowly sucked into the engine via intake tube?

alx

Yes. Both seafoam and chevron techron are very similar in what they do. In my mind seafoam is prolly even better. However, chevron techron is the only Mercedes officially approved additive for your car.

DaveW68

If you really want to get that engine all sparkly, then have the Motorvac treatment done at the dealer or a reliable indy. That will remove about 100x more crud than Seafoam or Techron. Both Seafoam and Techron do almost nothing, as evidenced by folks who've actually scoped the cylinders before and after running the treatment. Motorvac will get the cylinders, intake, and everything else it runs through looking like brand new. It will even clean out your cats. And it only costs around $150-200 to have the service done. It brings back lost power and increases fuel mileage. Lost compression due to age and wear magically comes back to full strength, and vacuum pressure readings return to normal levels.

IMA2NR

looks promising based on this:

http://www.theautochannel.com/mania/.../motorvac.html