Seafoam usage
 

Hi, I have a 1988 300ce with 180K on it. I am thinking about using seafoam to clean any carbon deposit in the engine. From the seafoam instruction it suggests one to use the PVC or Vaccum Brake Booster line. First of all, could some one tell me the location of those lines (pictures would be great)? Lastly, would it allow the seafoam to reach all the cylinders or another method is better? Thanks

Rick

I poured mine, very slowly so as not to stall the engine, directly into the air intake (after removing the air filter housing of course). This will get into all the cylinders, if your engine has a similar CIS injection as mine. The brake booster vacuum line is a real bear to remove too (just follow the tecalon tubing from the booster canister to the manifold to find the inlet port)!
Lots of smoke, great show for the neighbors! Not really sure if Seafoam actually cleaned anything up, but it didn't hurt anything either.