Go Back   Honda-Tech > Honda and Acura Technical Forums > Tech/Misc
Sign in using an external account
Register Forgot Password?
Search


Welcome to Honda-Tech!
Welcome to Honda-Tech.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Honda-Tech community today!


Reply
 
 
 
submit to reddit
 
Thread Tools Search this Thread
Old 02-03-2002, 08:19 PM   #1
joeg26er
Trial User
Garage is empty, add now
 
Join Date: Aug 2000
Location: PVB, FL, USA
Posts: 102
iTrader Rating: (0)
Default Will My Engine Run Better Or Worse If I Clean Carbon Deposits?

Well, I did a compression test twice on my engine and got 206/200/204/205 with the throttle plate wide open.

The egine has 125,600 miles on it and some are saying that these readings are high because of carbon
deposits.

I have heard that you can put ATF in the engine and intake to clean out the carbon deposits.
Would this cause my engine to run better or worse?

I would think that the carbon has filled in any gaps and made a better seal where it was needed?
__________________
Better to have and not need, than need and not have.

1994 GS-R Sedan just about bone-stock...for now...[img]http://images.zeroforum.com/smile/emwink.gif[/img]
Six Puck clutch, Heavy Duty Pressure Plate.
Kosei K-1's in 15x7
Kumho Ecsta Supra 712's 205/50/15 86V

RKBA!!!
An armed society is a polite society...
joeg26er is offline   Reply With Quote
Old 02-03-2002, 08:55 PM   #2
rainforest
Member
Garage is empty, add now
 
Join Date: Jul 2001
Location: clearwater, florida, united states
Posts: 1,940
iTrader Rating: (0)
Send a message via AIM to rainforest
Default Re: Will My Engine Run Better Or Worse If I Clean Carbon Deposits? (joeg26er)

well yeah it will run better if you have excessive carbon deposits. Carbon deposits will possibly help cause pre-ignition and detonation.
rainforest is offline   Reply With Quote
Old 02-06-2002, 06:13 AM   #3
virginia_dude
Honda-Tech Member
Garage is empty, add now
 
virginia_dude's Avatar
 
Join Date: Jan 2002
Location: Great Falls, VA, USA
Posts: 2,285
iTrader Rating: (0)
Send a message via AIM to virginia_dude
Default Re: Will My Engine Run Better Or Worse If I Clean Carbon Deposits? (joeg26er)

Excessive deposits would only hurt, the ECU will retard timing to control detonation and you lose power, you'll only hear the rattle if its gotten real bad, beyond what the computer can control. As far as what works, I've heard a strong MIST of water will do it. Don't stream water in, you'll hydro lock it aand bust things. I would think the ATF would not do good things to the CAT or the oxygen sensor. I've heard MOPAR Combustion chamber cleaner is good. then you've got the B&G motor vac which if you believe Pat Goss is good. But then he gets paid to promote them.


[Modified by virginia_dude, 10:14 AM 2/6/2002]
__________________
There are no stupid questions, Only stupid people.
Speed is a question of money. How fast do you want to go?
Section 609 MVAC Certified gearhead
virginia_dude is offline   Reply With Quote
Old 02-06-2002, 11:14 AM   #4
SpooN Man
Member
Garage is empty, add now
 
SpooN Man's Avatar
 
Join Date: Jul 2001
Location: Grand Rapids, Michigan
Posts: 1,824
iTrader Rating: (0)
Default Re: Will My Engine Run Better Or Worse If I Clean Carbon Deposits? (virginia_dude)

Lots of carbon can improve your compression test values. clean it and see Click the image to open in full size.
__________________
06 AW STI
SpooN Man is offline   Reply With Quote
Old 02-06-2002, 11:17 AM   #5
FSTASNTZ
Honda-Tech Member
Garage is empty, add now
 
Join Date: Feb 2000
Location: NC
Posts: 2,022
iTrader Rating: (0)
Send a message via AIM to FSTASNTZ
Default Re: Will My Engine Run Better Or Worse If I Clean Carbon Deposits? (SpooN Man)

I use the MOPAR stuff. Get a couple of cans of it if you have never done it before. And, do not have anyone stand behind the car, unless you really dislike them...


Jason
FSTASNTZ is offline   Reply With Quote
Old 02-06-2002, 11:59 AM   #6
virginia_dude
Honda-Tech Member
Garage is empty, add now
 
virginia_dude's Avatar
 
Join Date: Jan 2002
Location: Great Falls, VA, USA
Posts: 2,285
iTrader Rating: (0)
Send a message via AIM to virginia_dude
Default Re: Will My Engine Run Better Or Worse If I Clean Carbon Deposits? (SpooN Man)

Measured compresion values don't mean much. Carbon buildup is the cause of preingnition. And Knocking. Two things that will lighten your wallet when you damage your motor. If you want higher compression, get your head shaved. Carbon buildup is not a good thing to have.
__________________
There are no stupid questions, Only stupid people.
Speed is a question of money. How fast do you want to go?
Section 609 MVAC Certified gearhead
virginia_dude is offline   Reply With Quote
Old 02-06-2002, 02:49 PM   #7
joeg26er
Trial User
Garage is empty, add now
 
Join Date: Aug 2000
Location: PVB, FL, USA
Posts: 102
iTrader Rating: (0)
Default Re: Will My Engine Run Better Or Worse If I Clean Carbon Deposits? (virginia_dude)

How can I tell for sure if i have "excessive" carbon deposits?
Would I have to take my engine apart?

Anyone vouch for this water mist method?

Thanks for any help you can give.
__________________
Better to have and not need, than need and not have.

1994 GS-R Sedan just about bone-stock...for now...[img]http://images.zeroforum.com/smile/emwink.gif[/img]
Six Puck clutch, Heavy Duty Pressure Plate.
Kosei K-1's in 15x7
Kumho Ecsta Supra 712's 205/50/15 86V

RKBA!!!
An armed society is a polite society...
joeg26er is offline   Reply With Quote
Old 02-06-2002, 03:49 PM   #8
-TJ
Honda-Tech Member
Garage is empty, add now
 
-TJ's Avatar
 
Join Date: Dec 2001
Location: Probably somewhere in an EF
Posts: 380
iTrader Rating: (0)
Default Re: Will My Engine Run Better Or Worse If I Clean Carbon Deposits? (joeg26er)

Be careful using any fuel addatives to clean carbon deposits.
Last year I thought it would be a good idea to use some Gumout Regane fuel system cleaner. Unfortunately, it worked too well. All the crap in the intake manifold/runners on my D15B2 washed down and adhered itself to the tops of the intake valves. All was well until I shut the car off. The next day, I went to start it - it never started again. The carbon crap that washed onto the intake valves solidified and caused the intake valves to not seat - no compression. That prompted an emergency DPFI to MPFI swap - easier to put in a spare motor than pull the head, clean valves.....

-TJ
-TJ is offline   Reply With Quote
Old 02-06-2002, 05:57 PM   #9
racerxadam
Honda-Tech Member
Garage is empty, add now
 
racerxadam's Avatar
 
Join Date: Dec 2001
Location: Filthadelphia Area, PA, USA
Posts: 1,568
iTrader Rating: (0)
Default Re: Will My Engine Run Better Or Worse If I Clean Carbon Deposits? (joeg26er)

i've heard of the water method. the idea is based on observing a car that has a blown head gasket. if you look in the cylinder that has the leak that will be the cleanest cylinder. the water cleans out the carbon deposits. if your going to try it don't do it at higher than idle rpm and don't mist too much cause water can't be compressed.
__________________
2010 CRF450R, 2001 CBR929RR, 2004 CRF50, 2001 Toyota Tacoma, 88 CRX Si Turbo 12.37 @113 mph Sold
racerxadam is offline   Reply With Quote
Old 02-06-2002, 07:40 PM   #10
martini
Member
Garage is empty, add now
 
Join Date: Jul 2001
Location: Bellingham, WA, USA
Posts: 1,510
iTrader Rating: (0)
Send a message via ICQ to martini
Default Re: Will My Engine Run Better Or Worse If I Clean Carbon Deposits? (racerxadam)

sounds like water injection. Lots of peopl use that. Not only will it decrease the chance of detonation by absorbing some of the heat in the combustion chamber, it will also "steam clean" your combustion chamber.

it would take quite a bit of injecting the water to clean it properly. I still suggest some ATF or Sea-Foam.
martini is offline   Reply With Quote
Old 02-07-2002, 06:04 AM   #11
virginia_dude
Honda-Tech Member
Garage is empty, add now
 
virginia_dude's Avatar
 
Join Date: Jan 2002
Location: Great Falls, VA, USA
Posts: 2,285
iTrader Rating: (0)
Send a message via AIM to virginia_dude
Default Re: Will My Engine Run Better Or Worse If I Clean Carbon Deposits? (joeg26er)

I would think ATF would carbon things up worse, or plug the cat. But a clean engine will run better than a very dirty one in any case. Carbon deposits creat hot spots that cause pre-ignition and detonation. The knock sensors won't be telling the computer to retard ingnition timing, You'll be able to run a lower octaine gas and make more power in the same time. If you hear the engine knock with the recomended octaine fuel in it you really need to take care of it. The computer can only do so much to stop it. You would already be losing power before you even knew you had a problem.


[Modified by virginia_dude, 10:05 AM 2/7/2002]


[Modified by virginia_dude, 10:06 AM 2/7/2002]
__________________
There are no stupid questions, Only stupid people.
Speed is a question of money. How fast do you want to go?
Section 609 MVAC Certified gearhead
virginia_dude is offline   Reply With Quote
Old 02-07-2002, 06:53 AM   #12
SoloSol
Honda-Tech Member
Garage is empty, add now
 
SoloSol's Avatar
 
Join Date: Jan 2001
Location: RICHMOND, VA, USA
Posts: 907
iTrader Rating: (0)
Send a message via AIM to SoloSol
Default Re: Will My Engine Run Better Or Worse If I Clean Carbon Deposits? (virginia_dude)

we have a bg carbon cleaning system that the dealership uses. it uses compressed air, chemicals with the engine running
__________________
That's just it, a good driver will perform in a good car. A great driver will perform with dog **** with brakes.

SoloSol is offline   Reply With Quote
Old 02-07-2002, 10:32 AM   #13
virginia_dude
Honda-Tech Member
Garage is empty, add now
 
virginia_dude's Avatar
 
Join Date: Jan 2002
Location: Great Falls, VA, USA
Posts: 2,285
iTrader Rating: (0)
Send a message via AIM to virginia_dude
Default Re: Will My Engine Run Better Or Worse If I Clean Carbon Deposits? (joeg26er)

A thought about the ATF method. Your intake right up to the head is dry, no fuel. ATF lining that will collect any dirt and dust that gets past your air filter and build up. That can not be a good thing either. Think about it, nothing to flush the atf out of the intake, short of removing it and cleaning it.
__________________
There are no stupid questions, Only stupid people.
Speed is a question of money. How fast do you want to go?
Section 609 MVAC Certified gearhead
virginia_dude is offline   Reply With Quote
 
 
 
submit to reddit
Reply

Tags
atf, bg, car, carbon, clean, cleaner, cleaning, cylinders, engine, gumout, hurt, intake, regane, richmond, run, va, valves, water

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Forum Jump



All times are GMT -8. The time now is 06:23 PM.



2008 Copyright, InternetBrands Inc.
Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.

Honda and the Honda marquee are registered trademarks of the American Honda Motor Company, Inc. Neither American Honda Motor Company nor its subsidiaries or affiliates shall bear any responsibility for Honda-Tech.com content, comments, or advertising. Honda-Tech.com is not affiliated with American Honda Motor Company in any way. American Honda Motor Company does not sponsor, support, or endorse Honda-Tech.com in any way. Copyright/trademark/sales mark infringements are not intended or implied.
Emails & Contact Details