GM Top End Cleaner
Thread Starter
Advanced
Joined: Dec 2002
Posts: 83
Likes: 0
From: Everett WA
GM Top End Cleaner
I've got an 87 with 87,000 miles. Even after a tuneup, it will knock a bit when you really get on it. When my old 84 Chevy pickup got to about the same mileage, it had a similar problem. The dealer recommended a product by GM called Top End Cleaner. You poured it down the carb and waited a while. Then after you started it, there was an awful smell/smoke, but the thing ran great! Is there a similar product I can use on the Corvette?
Drifting
Joined: Mar 2001
Posts: 1,636
Likes: 3
From: Lafayette IN
Re: GM Top End Cleaner (87Vert)
SeaFoam is comercially available, and it is relatively the same--a top end cleaner. Dodge has their own, I believe, and as you found out, so does GM.
If the 'knocking' is pinging d/t carbon in the chambers, it is supposed to help out.
If the 'knocking' is pinging d/t carbon in the chambers, it is supposed to help out.
Drifting
Joined: Nov 2002
Posts: 1,365
Likes: 3
From: Huntsville AL
Re: GM Top End Cleaner (87Vert)
Safety Car
Joined: May 1999
Posts: 3,651
Likes: 5
From: Atlantis
Cruise-In I Veteran
Re: GM Top End Cleaner (87Vert)
I've been riduculed enough over this so NO FLAMES PLEASE. :rant:
PLEASE, let's don't start ANOTHER discussion on whether or not some of these 'fixes in a bottle' work or not. :cuss
YMMV but I use Marvel Mystery Oil in my fuel. It is an "upper cylinder" lubricant and cleaner.
It keeps crud off your valve stems and outta your combustion chambers including piston tops.
PLEASE, let's don't start ANOTHER discussion on whether or not some of these 'fixes in a bottle' work or not. :cuss
YMMV but I use Marvel Mystery Oil in my fuel. It is an "upper cylinder" lubricant and cleaner.
It keeps crud off your valve stems and outta your combustion chambers including piston tops.
Melting Slicks
Joined: May 1999
Posts: 2,037
Likes: 0
From: Sarasota FL
Re: GM Top End Cleaner (VetNutJim)
I use GM top engine cleaner a couple times a year and love it. I use a funnel and tube directly into the throttle body. Just follow the instructions on the can. Be careful, the stuff eats paint, including the garage floor, but I recommend doing it outside anyway. The more smoke you get, the better the car will run after the smoke burns off.
Drifting
Joined: Mar 1999
Posts: 1,931
Likes: 1
From: Norcross GA
Re: GM Top End Cleaner (Aaron's 87)
Water will have the same effect. Ever see a cyl head that had a gasket failure?
Steam cleaned cyl's.
I have alway's thought "Top Engine Cleaner" was just Sea Foam in a GM can.
Steam cleaned cyl's.
I have alway's thought "Top Engine Cleaner" was just Sea Foam in a GM can.
Safety Car
Joined: Dec 2000
Posts: 3,767
Likes: 5
From: Jacksonville Fl
Re: GM Top End Cleaner (ZylaRace)
Yea...just take aa mixture of water and antifreeze and suck it in through a vacuum hose on the throttle body. Run about two gallons through and it will be as clean as new. (Well...close to it anyway).
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
Safety Car
Joined: Dec 2000
Posts: 3,767
Likes: 5
From: Jacksonville Fl
Re: GM Top End Cleaner (BBA)
In fact...I just got the urge and ran two gallons of water/antifreeze mix through mine.
The neighbors didnt even notice much since it is raining outside. :)
I guess we'll see if the pinging goes away on the next hot dry day that comes along.
The neighbors didnt even notice much since it is raining outside. :)
I guess we'll see if the pinging goes away on the next hot dry day that comes along.
Drifting
Joined: Mar 2001
Posts: 1,636
Likes: 3
From: Lafayette IN
Re: GM Top End Cleaner (BBA)
In fact...I just got the urge and ran two gallons of water/antifreeze mix through mine.
Safety Car
Joined: Dec 2000
Posts: 3,767
Likes: 5
From: Jacksonville Fl
Re: GM Top End Cleaner (HighHopes85)
LOL...I didnt run that much antifreeze in it.
Besides, O2 sensors live through a LOT of ****. Mine is only about a year old so I think it will survive this once or twice. :D
Besides, O2 sensors live through a LOT of ****. Mine is only about a year old so I think it will survive this once or twice. :D
