Technical Discussion Topics related to Technical Issues

Carbon deposits on piston????

Old 12-14-2006, 04:42 AM
  #1  
Senior Member
SuperSport
Thread Starter
 
AZZKIKER's Avatar
 
Join Date: Aug 2004
Location: MICHIGAN
Posts: 731
AZZKIKER is an unknown quantity at this point
Carbon deposits on piston????

Hey guys, I purchased some performance heads for my SH a while ago and I started taking the stock heads off. I noticed there was a film of carbon deposits on the piston surfaces. Is that normal and how could I clean it. It seems like the carbon is baked on there.
Thanx
AZZKIKER is offline  
Old 12-14-2006, 05:25 AM
  #2  
ole dirty bastard
SuperSport
 
hawxter996's Avatar
 
Join Date: Jul 2004
Location: my house
Posts: 975
hawxter996 is an unknown quantity at this point
Originally Posted by AZZKIKER View Post
Hey guys, I purchased some performance heads for my SH a while ago and I started taking the stock heads off. I noticed there was a film of carbon deposits on the piston surfaces. Is that normal and how could I clean it. It seems like the carbon is baked on there.
Thanx
ive heard easy off works wonders.
how about it guys?
is it safe?
this requires pulling pistons from engine of course,dont want any
foreign matter in cases.

mike e.
hawxter996 is offline  
Old 12-14-2006, 05:41 AM
  #3  
Senior Member
SuperSport
Thread Starter
 
AZZKIKER's Avatar
 
Join Date: Aug 2004
Location: MICHIGAN
Posts: 731
AZZKIKER is an unknown quantity at this point
don't wanna pull the pisons out though.
AZZKIKER is offline  
Old 12-14-2006, 06:12 AM
  #4  
Senior Member
Superstock
 
Join Date: Dec 2005
Posts: 428
Speed_Demon is an unknown quantity at this point
hawxter996 is right. You have to pull the pistons because little bits of carbon get between the piston and cylinder wall and in the ring grooves and act like an abrasive. If you do decide to procede without pulling the pistons you might want to get creative like putting the piston at the top if its stroke and with the engine inverted clean the carbon and flush the crap out of it before moving the engine.

This may be a good opportunity to hone the cylinders and replace the rings or atleast reseat the old ones to restore perfect compression.
Speed_Demon is offline  
Old 12-14-2006, 07:41 AM
  #5  
Senior Member
SuperBike
 
RCVTR's Avatar
 
Join Date: Dec 2005
Location: South Lake Tahoe, CA, USA
Posts: 1,689
RCVTR is an unknown quantity at this point
Oscar,
I would leave it there. Like Hawxter says, if you try to remove it, it will end up in the bores causing wear. A lot of it is due to crappy pump gas. Run some Techroline and it will clean it up pretty well. The good part is that stuff takes up space and increases compression ratio.
RCVTR is offline  
Old 12-14-2006, 08:17 AM
  #6  
ole dirty bastard
SuperSport
 
hawxter996's Avatar
 
Join Date: Jul 2004
Location: my house
Posts: 975
hawxter996 is an unknown quantity at this point
Originally Posted by RCVTR View Post
Oscar,
I would leave it there. Like Hawxter says, if you try to remove it, it will end up in the bores causing wear. A lot of it is due to crappy pump gas. Run some Techroline and it will clean it up pretty well. The good part is that stuff takes up space and increases compression ratio.
the bad part is,it causes hot spots and causes detonation.
so if your raising comp. with your new heads,get that crap
out of there.
better yet treat them new heads to a set of performance pistons and cams.
hawxter996 is offline  
Old 12-14-2006, 10:26 AM
  #7  
Senior Member
SuperSport
Thread Starter
 
AZZKIKER's Avatar
 
Join Date: Aug 2004
Location: MICHIGAN
Posts: 731
AZZKIKER is an unknown quantity at this point
Originally Posted by RCVTR View Post
Oscar,
I would leave it there. Like Hawxter says, if you try to remove it, it will end up in the bores causing wear. A lot of it is due to crappy pump gas. Run some Techroline and it will clean it up pretty well. The good part is that stuff takes up space and increases compression ratio.

Alright bro, thanx for the info. What is techronline?
AZZKIKER is offline  
Old 12-14-2006, 11:20 AM
  #8  
Senior Member
SuperBike
 
RCVTR's Avatar
 
Join Date: Dec 2005
Location: South Lake Tahoe, CA, USA
Posts: 1,689
RCVTR is an unknown quantity at this point
True about hot spots. Especially if it's big and flaky. I was referring more to an even deposit a few thousandths thick.

Techroline is a Chevron fuel additive. Also available at the auto parts store. It will also prevent the buildup on the backs of the valves.
RCVTR is offline  
Old 12-14-2006, 12:38 PM
  #9  
Moderate-whore
MotoGP
 
Randman's Avatar
 
Join Date: Nov 2005
Location: Leander TX!!
Posts: 9,045
Randman is on a distinguished road
Seafoam....Best stuff for everything...imho
Randman is offline  
Old 12-14-2006, 10:36 PM
  #10  
Sprung
World Champion
 
Hawkrider's Avatar
 
Join Date: Dec 2004
Location: Fulton, MO
Posts: 105,285
Hawkrider will become famous soon enoughHawkrider will become famous soon enough
It's Techron, not Techroline. Seafoam is good stuff too. I'd leave it be and run some additives through it when you're done. Use better gas from now on.
Hawkrider is offline  
Old 12-15-2006, 06:49 AM
  #11  
Senior Member
SuperBike
 
RCVTR's Avatar
 
Join Date: Dec 2005
Location: South Lake Tahoe, CA, USA
Posts: 1,689
RCVTR is an unknown quantity at this point
You're right. It's Techron. I thought it was Techron at the pump and Techroline in the bottle. But it was the other way around. And now it's just Techron both places. Good stuff, that.

Chevon Supreme has more of it than their regular gas. I would buy a bottle and run a few tanks with it added. I run Chevron all the time in my vehicles. I think Shell now has the same additive.
RCVTR is offline  
Old 12-15-2006, 09:10 AM
  #12  
Moderate-whore
MotoGP
 
Randman's Avatar
 
Join Date: Nov 2005
Location: Leander TX!!
Posts: 9,045
Randman is on a distinguished road
Originally Posted by Hawkrider View Post
It's Techron, not Techroline. Seafoam is good stuff too. I'd leave it be and run some additives through it when you're done. Use better gas from now on.
Better gas...so 87, 89, 91, 92 or 93 octane....which is it.....lol....open can :-D :-D
Randman is offline  
Old 12-15-2006, 02:23 PM
  #13  
Sprung
World Champion
 
Hawkrider's Avatar
 
Join Date: Dec 2004
Location: Fulton, MO
Posts: 105,285
Hawkrider will become famous soon enoughHawkrider will become famous soon enough
Not necessarily octane rating, but brand. This works a couple ways. For example on low compression Chevy motors, if you run super unleaded in them they get carbon build up, but not with regular unleaded. Higher compression motors such as the LS1/2 require super but don't get build up. The Superhawk motor is a relatively low compression motor, and though I've always used super in all my bikes, I've never found indication of carbon buildup. It usually will occur on valves first, and keep in mind that if your jetting is correct then this will minimize its occurrance.
Hawkrider is offline  
Old 12-16-2006, 10:41 AM
  #14  
Senior Member
SuperBike
 
JamieDaugherty's Avatar
 
Join Date: Aug 2005
Location: Fort Wayne, IN
Posts: 1,836
JamieDaugherty is an unknown quantity at this point
Carbon on the piston tops is normal. That is, unless it's so thick that it's causing interference with the head and/or valves (which I doubt). I'd just leave it alone.
JamieDaugherty is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
zxbud
General Discussion
2
10-13-2012 01:40 PM
uchi
Technical Discussion
11
09-20-2010 08:54 PM
Streaky
General Discussion
4
05-02-2007 08:06 AM
lotp
Modifications - Performance
5
02-22-2007 05:41 PM
killer5280
Modifications - Performance
21
10-03-2006 09:03 AM


Thread Tools
Search this Thread
Quick Reply: Carbon deposits on piston????


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.

All times are GMT -7. The time now is 10:27 PM.


© 2019 MH Sub I, LLC dba Internet Brands