Hey guys. I have been toying with the idea of doing an mmo piston soak in my dodgean and I was wondering exactly what the proper steps were to doing this procedure. Your help is much appreciated
mmo piston soak
- Thread starter grease_monkey
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Sorry meant to say dodge
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Try a piston soak with GM or Chrysler top engine cleaner its pretty potent stuff.
Auto-RX is good for cleaning up the ring-pack.
Can a significant (enough) saturation level be obtained through traditional vacuum lines (PCV, Brake Booster) to achieve the desired effect if let sit for an equivalent amount of time?
Reason I'm asking is I am curious about attempting this procedure on my wife's f-150. Since it does not have the easy access, vertical plug holes, this would be more difficult to achieve on the v-8. I have done seafoam through both the brake booster and pcv, but generally when i have done that it has been about 30 min of wait before the smoke show (which i'm not entirely convinced is from "carbon" as opposed to burning a large amount of non-gasoline) as opposed to 8 or 9 hours.
Reason I'm asking is I am curious about attempting this procedure on my wife's f-150. Since it does not have the easy access, vertical plug holes, this would be more difficult to achieve on the v-8. I have done seafoam through both the brake booster and pcv, but generally when i have done that it has been about 30 min of wait before the smoke show (which i'm not entirely convinced is from "carbon" as opposed to burning a large amount of non-gasoline) as opposed to 8 or 9 hours.
Originally Posted By: Eddie
Auto-RX is good for cleaning up the ring-pack.
Normally I'd agree but because the pistons behind Saturn's rings are defective they coke up no matter how well they are treated. Only a lucky few have limited success with oil additives of any type. Real success comes when the missing oil drain holes are drilled at the machine shop.
Auto-RX is good for cleaning up the ring-pack.
Normally I'd agree but because the pistons behind Saturn's rings are defective they coke up no matter how well they are treated. Only a lucky few have limited success with oil additives of any type. Real success comes when the missing oil drain holes are drilled at the machine shop.
Originally Posted By: El_Schaf
Can a significant (enough) saturation level be obtained through traditional vacuum lines (PCV, Brake Booster) to achieve the desired effect if let sit for an equivalent amount of time?
Reason I'm asking is I am curious about attempting this procedure on my wife's f-150. Since it does not have the easy access, vertical plug holes, this would be more difficult to achieve on the v-8. I have done seafoam through both the brake booster and pcv, but generally when i have done that it has been about 30 min of wait before the smoke show (which i'm not entirely convinced is from "carbon" as opposed to burning a large amount of non-gasoline) as opposed to 8 or 9 hours.
Syringe with some a bit of tubing on the end should work. Stick the tubing in the spark plug hole and inject.
Can a significant (enough) saturation level be obtained through traditional vacuum lines (PCV, Brake Booster) to achieve the desired effect if let sit for an equivalent amount of time?
Reason I'm asking is I am curious about attempting this procedure on my wife's f-150. Since it does not have the easy access, vertical plug holes, this would be more difficult to achieve on the v-8. I have done seafoam through both the brake booster and pcv, but generally when i have done that it has been about 30 min of wait before the smoke show (which i'm not entirely convinced is from "carbon" as opposed to burning a large amount of non-gasoline) as opposed to 8 or 9 hours.
Syringe with some a bit of tubing on the end should work. Stick the tubing in the spark plug hole and inject.
How about a berrymans piston soak? Anyone ever do that one?
Originally Posted By: El_Schaf
Can a significant (enough) saturation level be obtained through traditional vacuum lines (PCV, Brake Booster) to achieve the desired effect if let sit for an equivalent amount of time?
Reason I'm asking is I am curious about attempting this procedure on my wife's f-150. Since it does not have the easy access, vertical plug holes, this would be more difficult to achieve on the v-8. I have done seafoam through both the brake booster and pcv, but generally when i have done that it has been about 30 min of wait before the smoke show (which i'm not entirely convinced is from "carbon" as opposed to burning a large amount of non-gasoline) as opposed to 8 or 9 hours.
A lot of people believe that sucking a pint of seafoam down the engine and making all that smoke is doing something.IMO its just filling the cat,muffler and exhaust with pale oil and burning off without doing much of anything else,a bunch of smoke with a feel good factor.Water will work just as well.
We do a lot of N* engines with real carbon issues and nothing but pouring down the plug holes works well although water works by the vacuum method sometimes when its not to bad.Its easy to tell it did nothing because the next morning the thing will still have that awful carbon knock.
After doing a real piston soak with GM top engine cleaner the knock goes away completely.
It seems to be effective an overnight soak with a powerful chemical cocktail is needed,the GM stuff has acidic compounds in it.
I understand Chrysler has one also that maybe as good or better than the GM but i haven't tried it.
The F150 plugs can be a bear to pull just to do this,carbon build up doesn't seem to be a major issue with them so i would wait until it was time to change them.Use a small funnel with a hose as someone suggested.Try sucking water slowly through one of rear vacuum ports if anything before doing the plugs.
Can a significant (enough) saturation level be obtained through traditional vacuum lines (PCV, Brake Booster) to achieve the desired effect if let sit for an equivalent amount of time?
Reason I'm asking is I am curious about attempting this procedure on my wife's f-150. Since it does not have the easy access, vertical plug holes, this would be more difficult to achieve on the v-8. I have done seafoam through both the brake booster and pcv, but generally when i have done that it has been about 30 min of wait before the smoke show (which i'm not entirely convinced is from "carbon" as opposed to burning a large amount of non-gasoline) as opposed to 8 or 9 hours.
A lot of people believe that sucking a pint of seafoam down the engine and making all that smoke is doing something.IMO its just filling the cat,muffler and exhaust with pale oil and burning off without doing much of anything else,a bunch of smoke with a feel good factor.Water will work just as well.
We do a lot of N* engines with real carbon issues and nothing but pouring down the plug holes works well although water works by the vacuum method sometimes when its not to bad.Its easy to tell it did nothing because the next morning the thing will still have that awful carbon knock.
After doing a real piston soak with GM top engine cleaner the knock goes away completely.
It seems to be effective an overnight soak with a powerful chemical cocktail is needed,the GM stuff has acidic compounds in it.
I understand Chrysler has one also that maybe as good or better than the GM but i haven't tried it.
The F150 plugs can be a bear to pull just to do this,carbon build up doesn't seem to be a major issue with them so i would wait until it was time to change them.Use a small funnel with a hose as someone suggested.Try sucking water slowly through one of rear vacuum ports if anything before doing the plugs.
Forget seafoam in the intake.
Use a good strong cleaner in a tank of gas, and run it down - give it a chance to work.
Amsoil PI, Chevron Techron, or Redline SI-1 are very good.
And they also clean all sorts of other stuff besides the C.C.!
Use a good strong cleaner in a tank of gas, and run it down - give it a chance to work.
Amsoil PI, Chevron Techron, or Redline SI-1 are very good.
And they also clean all sorts of other stuff besides the C.C.!
Well I went ahead and did mmo piston soak because the plugs are on top of the intake manifold on my dodge. When it comes time to change plugs I will probably use gm or chrysler top end cleaner
So after I got the plugs installed I started up my truck and it smoked. I figured this was normal so I let it run for 5 min and then I took off for work which was about a 35 minute commute by freeway. It stopped smoking by the time I got on the freeway. Now I go outside to start it up after it sat for 8 hours and it smoked a big puff of smoke almost like any car with worn valve guides, except the smoke was white. Same color it was this morning, and the oil has no sighn of coolant contamination, and the coolant shows no sighn of oil contamination. Is this normal?
Last edited:
Grease_monkey,
Is your truck still smoking?
Did you see a difference after the soak?
I'm doing one now.
It was needed as one cylinder did had standing MMO after 12 hrs soak.
I'm following with chemtool B12 soak. Will change oil later today.
Is your truck still smoking?
Did you see a difference after the soak?
I'm doing one now.
It was needed as one cylinder did had standing MMO after 12 hrs soak.
I'm following with chemtool B12 soak. Will change oil later today.
I've done MMO and B12 soaks on my old Saturn - nothing helped. But at a quart every 300 miles I didn't expect miracles.
I finished my soak. It was my own recipe. First 1-2 oz MMO overnight (12 hrs). Then sucked it back with syringe and tube. 3 cylinders lost most MMO, one cylinder still had it. There were small carbon particles. Then I did B12 soak 1 oz for 6 hrs. Evacuated again, this time with lots of loose carbon. At the end 7cc of ATF to have ring seal and fired. Lots of smoke for 5-10 minutes idling. Then changed oil. No difference in engine sound, may be pulls stronger but not sure. Time will tell with consumption. I have minimal consumption that just started and this is a preventive measure while I checked spark plugs and did oil change.
I agree that if one has a neglected case with lots of burning, soaking will not help. The soaking agent has to get in the ring area first.
I agree that if one has a neglected case with lots of burning, soaking will not help. The soaking agent has to get in the ring area first.
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