SeaFoam in fuel filter?

92pajero · Post by **92pajero** » Sun Dec 11, 2011 7:26 pm

So I have a quick question, everyone on here says to fill your new fuel filter with seafoam then install, prime and run your engine. Doesnt the over pressure run back to the fuel tank so why not just add it to your fuel tank and let it work that way?

jessef · Post by **jessef** » Sun Dec 11, 2011 7:54 pm

because the sea foam gets diluted in the tank with the X amount of diesel liters = gradual cleanse.

putting a 1/2 can into a new fuel filter will push most of it through right away into the IP/injectors = immediate cleanse.

pajerry · Post by **pajerry** » Mon Dec 12, 2011 8:00 am

I was going to try this. Will it be a waste to do it in the city, or should I just change it roadside and blast it on the hwy?

Thanks.

jessef · Post by **jessef** » Mon Dec 12, 2011 10:34 am

it's quite a smokeshow. I wouldn't do it downtown but use your judgement

pajerry · Post by **pajerry** » Wed Dec 14, 2011 9:44 pm

When is the next critical mass??

92pajero · Post by **92pajero** » Sat Dec 31, 2011 2:12 pm

So I did the sea foam today in the pajero, pulled the fuel filter put half a can into the fuel filter replaced and primed it. Smoke? I was warned about smoke coming out like the bowels of hell with brimstone. To no avail it fired up and purred like a kitten, a average size kitten, lol. Maybe my previous maintenance and routine had it clean already. I run lucas oil additive in the crankcase with my rotella t 15/40, I also use upper cylinder lubricant (Lucas) 22.95 for a 4 liter jug and all you need to add is 100ml per 50 liter of fuel, also run cetane boost (9.99 per liter) 200ml per 90l tank. Runs like a charm and gets me 8.8l per 100 km on highway and 11.5 per 100km in city.

Let me know what your seafoam treatment has done for you.

Kelly

Raule Duke · Post by **Raule Duke** » Sat Dec 31, 2011 2:29 pm

The best way to use seafoam or similar products is to pour the contents of it into a wide glass jar or cut a 2 liter bottle in half and use it, then remove the fuel pick up AND return lines and submerge them in the fluid. Make sure the motor is hot before you start. Run the motor at a variety of different RPMs untill fluid is gone. Normally will take a good ten mins. Let the vehicle sit for 15 mins or so while your reattach your fuel lines, and the solvent will breakdown carbon a little more. Then drive for a while. You will only get a big smoke show if your motor is really coked up from lots of city driving.

92pajero · Post by **92pajero** » Sat Dec 31, 2011 5:36 pm

I believe the only way to run up a diesel is to fill the fuel filter and run her up. If you dont you run the risk of vapor locking the IP and lines and injectors. Yes? I guess she is upto spec due to my rigoris maint schedule, since she didnt smoke up and yes I prewarmed the engine to avoid a hard start cold just on seafoam

psilosin · Post by **psilosin** » Sat Dec 31, 2011 5:48 pm

Raule Duke wrote:The best way to use seafoam or similar products is to pour the contents of it into a wide glass jar or cut a 2 liter bottle in half and use it, then remove the fuel pick up AND return lines and submerge them in the fluid. Make sure the motor is hot before you start. Run the motor at a variety of different RPMs untill fluid is gone. Normally will take a good ten mins. Let the vehicle sit for 15 mins or so while your reattach your fuel lines, and the solvent will breakdown carbon a little more. Then drive for a while. You will only get a big smoke show if your motor is really coked up from lots of city driving.

Agree. That gives it a very good intensive treatment and is awesome if you have never done a seafoam treatment on your vehicle. Fuel filter is much easier but the excess returns to your tank getting diluted...but is great if you already have a clean(ish) engine and make it part of your scheduled routine helping to keep your engine from ever getting all gunky.

Raule Duke · Post by **Raule Duke** » Sat Dec 31, 2011 6:19 pm

92pajero wrote:I believe the only way to run up a diesel is to fill the fuel filter and run her up. If you dont you run the risk of vapor locking the IP and lines and injectors. Yes? I guess she is upto spec due to my rigoris maint schedule, since she didnt smoke up and yes I prewarmed the engine to avoid a hard start cold just on seafoam

not true..... If you have your hands on the jar (gatorade bottle) you can be sure it never runs dry and have a helper kill the motor before its empty. putting it in the filter is almost useless as it will send all but2% or so back to the tank and dilute it. you dont realize how much the fuel pump is pulling through the filter and then sending back to the tank if your reving high with no load on the motor

mac_stang · Post by **mac_stang** » Sun Jan 01, 2012 9:50 pm

Or youcan follow the 20 year old instructions...spray half a bottle in the intake and the other half in the tank...been doin this on every vehicle ive owned since i was sixteen. I always notice more positives in a gas pot.

Brad.

mac_stang · Post by **mac_stang** » Sun Jan 01, 2012 9:52 pm

edit

Raule Duke · Post by **Raule Duke** » Fri Jan 27, 2012 8:49 am

mac_stang wrote:Or youcan follow the 20 year old instructions...spray half a bottle in the intake and the other half in the tank...

Brad.

Spraying it in the intake is no good on diesels! Specially turbo'd. The idea is to clean the injectors on a diesel. And putting the half a can in the tank is also useless as it will be so diluted.

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