Like Tree0Likes

Ever hear of "GM upper end cleaner" ?

Old 07-02-2003, 11:24 AM
Posts: n/a
Default Ever hear of "GM upper end cleaner" ?

I'm told you buy this at a GM dealer. You run your engine and warm it up...then pour the cleaner in slowly while running. Then shut the motor off for at least 20 minutes. Then start it up and all of the carbon is suppose to be expelled for the cylinders and pistons out through the exhaust. Anyone know anything about this ?
Reply With Quote
Old 07-02-2003, 11:35 AM
Join Date: Nov 2000
Location: Westport, Kentucky
My Boats: Baja Force 235
Posts: 1,282

Merc sells it as well. Works good on an engine that has a lot of carbon built up so they say. Look in a spark plug hole and see if you need it.
BadDog is offline  
Reply With Quote
Old 07-02-2003, 11:41 AM
Trade Score: (1)
HiPerf2000's Avatar
Join Date: Oct 2000
Location: N.E.
My Boats: Sonic
Posts: 4,072

are you trying to get rid fo the "cold start knock" in a 6.0 ltr. motor????

I've heard chevy recommend this before.
HiPerf2000 is offline  
Reply With Quote
Old 07-02-2003, 11:44 AM
Posts: n/a
Default No cold start knock

No, I have 540 bulldogs and I've experienced fouling out plugs due to running so rich. I've changed the primary and secondary jets and I thought I would try this stuff. I'm still running rich.
Reply With Quote
Old 07-02-2003, 12:39 PM
bobby daniels
Posts: n/a

hey guys just take and old spray bottle and put water in it and with the motor running spray in carb or air intake and it will I promise clean the inside to a polished clean ,its unreal everything is clean ,just add enough throttle to keep it from cutting off and spray healthy amounts in ,,windsheild cleaner with achol and soap does the best as it has distilled water ,achol ,soap and is cheap .Fromula fasttech did this on the board then pulled the heads and about fell over it was so clean
Reply With Quote
Old 07-02-2003, 12:48 PM
Forum Regulator
VIP Member
Trade Score: (1)
Sydwayz's Avatar
Join Date: May 2001
Location: Worldwide
My Boats: 17' Speedliner Cat & O.P.B.
Posts: 21,920


Sydwayz is offline  
Reply With Quote
Old 07-02-2003, 01:01 PM
djm's Avatar
Join Date: Nov 2000
Location: NJ
My Boats: boating sleeping drinking fishing drinking eating hunting
Posts: 168

It's called top end cleaner (part number 000001 or something like that).

Works great if done right, removes carbon from the top end and won't hurt the injectors. Once you find a line with constant vacuum the tough part is keeping the engine running long enough to suck the bottle down. Good luck with it.
djm is offline  
Reply With Quote
Old 07-02-2003, 01:14 PM
Platinum Member
Platinum Member
CigDaze's Avatar
Join Date: Jun 2001
Location: St. Petersburg, FL
My Boats: Cigarette 35 Cafe Racer
Posts: 21,346

Bobby's right.
It's an age-old trick that works! A fine-mist sprayer is the key. It's like steam-cleaning your carpet...kinda...well, not really...

It attacks carbon by cooling it rapidly, it then flakes off and disolves.
CigDaze is offline  
Reply With Quote
Old 07-02-2003, 02:01 PM
Were doomed!
Charter Member
Trade Score: (1)
Wally's Avatar
Join Date: Oct 2000
Location: Chicago, IL
My Boats: Chris Craft Stinger 222
Posts: 5,529

djm has it can also go to NAPA and get sea-foam........Dodge also has their version of it but cant remember the name off hand.
As for runnning it through the engine on a place i have found for a good vacume source is to pull the power brake assist hose and pour it through there......or if you have a PCV valve hose attachment on the intake hose thats another good place.......only remember NOT to introduce the chemical into the intake before the MAF consor!!!

Money can't buy happiness, but it can buy horsepower. And I've never seen a sad person hauling a$$!
Wally is offline  
Reply With Quote
Old 07-02-2003, 02:08 PM
Airpacker's Avatar
Join Date: Aug 2001
Location: Aurora Ontario
My Boats: little cat...BIG MOTOR
Posts: 4,008

A/C Delco part number for Kleens liquid bottle( it comes in spray cans too) is 992872. This is a stronger version of GM Top Cleaner.
Airpacker is offline  
Reply With Quote

Related Topics
Thread Starter
Last Post
General Boating Discussion
04-01-2006 04:33 PM
General Boating Discussion
03-27-2004 05:40 PM
General Q & A
07-02-2003 07:41 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 11:04 AM.

Copyright 2011 OffShoreOnly. All rights reserved.