atz06

I plan to do decarb my Vette this week. Should I use Sea Foam or GM Top Engine Cleaner? Which one is better?

Also, have anyone added Sea Foam to the oil crankcase per Sea Foam suggestion?

http://www.seafoamsales.com/motorTuneUpTechGas.htm

When Added to Crankcase (Oil)
1. Frees sticky lifters and rings
2. Increases R.P.M.'s vacuum and compression
3. Cleans dirty parts
4. Removes moisture
5. Cleans PCV valve systems
One pint treats 10 quarts of oil (avg. 1 1/2 ounce per quart).

Thanks.

screw991le

How many miles do you have on the car?
I like seafoam, myself.
Are you going to do the overnight cleaning?

RichieRichZ06

I have seen many good experiences with the GM stuff, but not in all applications. It works better on high mileage or highly carboned up motors.

rws.1

GM top engine cleaner and SeaFoam are very similar though not identical in composition. Both do the same job. I can't tell if one is better than the other. I have used them both.

Sigforty

I have always used Seafoam. The stuff works great have been using it for years now. Never tried the GM stuff cause I can get Seafoam locally and it has always worked.

atz06

I have 25K miles on the clock and this will be my first time to do the decarb. Not sure I need it at 25K or not. Do I need one or two bottle to do the job?

So Has anybody added Sea Foam to the oil crankcase? Thanks.

SpeedUp

Is it possible to use too much of this stuff? Either seafoam or the gm stuff ?

mdchaser

Nope, the only way to use too much is to pour five cans in the crank case so that you over fill. I used two cans of sea foam last time (1.5 through the pcv system, the other .5 in the crank case).

SpeedUp

1.5 in the PCV ? that must have smoked like a ****

One other thing. When you add to the crank, should you change the oil any time soon? Some have said within 500 miles, this true?

JR_VETTE

I believe you're supposed to do it immediately, but I could be mistaken.

cruisemon

I have a '98 coupe with 83K on the clock (bought at 78K) and may be overdue for a number of maintenance items ignored by prior owners. Planned things include changing out coolant, M6 trans fluid, rear end lube, brake fluid and the dreaded clutch master and slave cylinders. More years ago than I will EVER admit to, adding a cleaning compound with aggressive cleaning qualities to the crank case, running it for 30 minutes or so at idle, and then changing the oil was relatively common and cleaned an engine so that oil even after a few hundred miles the new oil wouldn't be black.

Is Sea Foam a similar type of product? Are there products used for the fuel system as well as the crankcase? Any chance it might be available at O'Reilly's, Pep Boys, or similar?

Charlie

atz06

Some say 500 miles if you add to the crankcase. That's what I did with my bike. I am planning to do the same thing to my Vette.

sugarwolf

They got it at shucks or autozone or napa

cruisemon

They sell it in gallon cans for $43.00. That works out to about $5.40 for 16 oz. Does that sound about right? Is the same product used in both the fuel and the oil?

Charlie

2kbluestreak

A question for anyone that has disassemble an LS1 that was run 100% on Mobil 1. Did you find any varnishing or sludge that would have been cleaned by Seafoam or GM cleaner?

cruisemon

GREAT question!



Charlie

kasper-pA-

I did the GM decarb a few weeks ago, let it sit for about 2hrs, then cleared it out... wow! have around 90K on her... and there was some smoke and some interesting crap coming out , lol....

I changed my OIL and plugs/wires afterwards as well... the plugs had some sludge build up that I am pretty sure came from the decarb... but all in all, the car runs so much smoother and idles so nice!

throttle response is much better now too! (probably from the plugs/wires)

pawngod

does the seafoam remove intake carbon deposits?? used through the gas tank? i recently removed intake to change oil gauge and noticed the intake port was caked over w/carbon? or is the carbon normal?

sugarwolf

Thats not carbon in ur intake, its oil. Came through the PVC and into the intake

cruisemon

The intake is a "dry" intake, meaning there would normally be no fluids of any kind in the intake. You are probably looking at PCV blow by. Might check the PCV and see if it needs to be replaced.

In answer to your specific question, because it's a dry intake, the intake will never "see" the Sea Foam so it won't remove deposits. If the deposits are bothersome, pull the intake, clean, and replace it. I don't know if there is a completely safe way to remove these deposits with the intake on the engine.

Charlie