Dirty Howie

I'm planning to do a tune up......plugs, wires and dyno ...... and want to make sure I don't have any carbon deposits. Basically want everything pristine for the dyno (mostly just getting A/F for WOT)

Only have 57K miles and relatively new heads. Can I hurt anything by doing the topend cleanout?? I heard something about fouling the O2 sensors.


DH

SLPRC5

I used Sea Form in my '97 and it worked GREAT!
Did not foul the O2 sensors or plugs.
I ran a can through and let it set overnight then took it out the next day to run it out until it stopped smoking.

But here is an e-mail I got from the company tell how to use it for the best results:

Everyone is right - it is a matter of preference.

I suggest - after the motor has been fogged ( semi-flooded) let it sit 5 - 10 minutes. ( The reason I would not let it sit 12 hours, is, that the motor would get cold, I think that the fogging job is better if it is a hot tank effect.

Fogging a motor should not effect the motor oil at all, different systems.

Yes, fogging a motor will get the plugs wet, BUT< they will dry themselves when you " Drive it like you stole it " when you clean out the system.

Hope this answers your questions.

Dale Lackore
National Sales Manager
Sea Foam Sales Company
(952)938-4811
d.lackore@seafoamsales.com

Evil-Twin

Seafoam is fine, but there is a better product.. although it is not legal in CA.
GM makes a Decarb solution. It was designed to handle the famous decarb issues found in many LS1/6 engines, It a top end engine cleaner.
You will be fine with Seafoam.

grinder11

I have been told it is the same product, chemically. I have used it in my Jeep Grand Cherokee, but only in the fuel tank as an additive, thus cleaning the injectors, as well. Personally, I am somewhat leery of using any product which may "break loose any deposits of any kind "all at once", or at least real quick, in larger chunks. Carbon is extremely hard, as it is carbon molecules being forced into alignment, which is what makes steel harden when carborized and heat treated. I am somewhat fearful of scoring a cylinder if all the carbon were to break loose quickly, rather than dissolving it slowly by adding it to the fuel. Just my .02, but the Jeep is at 276,000 miles now (318 V-8), and all original, including the injectors, too, so I must be doing something right! It is a great product, and I use it monthly. Original 02 sensor, as well!!

Dirty Howie

Evil: as I am in california I will use Seafoam. What do you think of the comments from the other members???

Rusty: seems that 5-10 minutes is not going to disolve carbon deposits that have been on my piston heads for almost 60K miles

Grinder: seems like a logical point but I hope GM and others already thought of that and that it is safe


DH

SLPRC5

My wife has a '97 Jeep Grand Cherokee same engine with 79K on it and I plan to pour a can down the PCV port, then change plugs and PCV valve to get ready for a CA smog test. Tell me did it improve your gas milage?
Thanks,
Rsty

jers98vet

I only use 1/2 can at a time. Dont pour it in too fast. I used my boost gauge vacuum line to draw it into the intake. Let it sit overnight then blow it out. Repeat as necessary until no kr is recorded.

Dirty Howie

How soon after blowing out all the Seafoam and carbon crap are you supposed to do the oil change?????

And is TWO can the correct amount?????


DH

Dirty Howie

Rusty:

I don't see any e-mail ???


DH

Dirty Howie

Well I bought 2 cans of SeaFoam !!!

Can says:
To use 1/2 can (.5 pts)....thru intake manifold
In WARM engine
Turn off engine
Restart in 5 MINUTES !!!

Why is this so different than the tech instructions for the GM topend cleaner:
https://www.corvetteforum.com/techti...=212&TopicID=1


DH

grinder11

They have, that is why the instructions don't recommend "sucking it up your PCV hose"!

BrentH

FWIW, I have always used Amsoil Powerfoam, and it seems to do a pretty good job.

Lovin It!!! - C5

SeaFoamed mine yesterday. Changed the oil and plugs today after running the carbon out of it. Runs very smoothly now. I also added a 1/2 can to the oil last week and then drove it a couple hundred miles. That annoying ticking on start-up is now gone! It's nice not to hear it anymore.

Dirty Howie

How much did you use.
How long did you leave it in.


DH

C66 Racing

Thanks for the mention.
AMSOIL Power Foam Engine Cleaner and Degreaser

Lovin It!!! - C5

Bought two cans. Put a 1/2 can in the oil. Drove all week (about 150 miles). Yesterday evening I poured the rest (1 1/2 cans) into the PCV port on the throttle body and let it sit until about 10:30 today.

It worked great for me. Had heard others say they got rid of the infamous "piston slap" sound by using it in the oil, so I tried it. VERY happy with the results.

Rhode Warrior

This is what my pistons looked like at exactly 57,000 miles:

This is after I cleaned them by hand:

Dirty Howie

You mean PCV port on the INTAKE manafold.....


DH

Dirty Howie

That looks like NEW.....great job
What did you use....how long did it take??

I know mine look like that too..........I am hoping the Seafoam thru the Intake Manafold and foging is going to get rid of most of it......but somehow I don't think the results will be anything like what you did!!!!


DH

SLPRC5

The e-mail is there in the body of my thread
Here is the cut and paste of it.

"Everyone is right - it is a matter of preference.

I suggest - after the motor has been fogged ( semi-flooded) let it sit 5 - 10 minutes. ( The reason I would not let it sit 12 hours, is, that the motor would get cold, I think that the fogging job is better if it is a hot tank effect.

Fogging a motor should not effect the motor oil at all, different systems.

Yes, fogging a motor will get the plugs wet, BUT< they will dry themselves when you " Drive it like you stole it " when you clean out the system."

Hope this answers your questions.

Dale Lackore
National Sales Manager
Sea Foam Sales Company
(952)938-4811
d.lackore@seafoamsales.com

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