Carbon build up around intake valves? - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

supramkivtt2jz · 03-21-2014, 03:31 PM

Quote:

Originally Posted by teamturbo

Anyone brave enough to use that Sea Foam cleaner? Supposedly works, but looks kinda scary...not sure I'd want to put that in my baby's engine!

...... what is scary about it?

stugray · 03-21-2014, 03:39 PM

Whoa! wait. I dont see dual springs in that pic above.

These engines dont have dual springs?
I thought valve float was an issue above ~6k unless you had dual springs....

w00t692 · 03-21-2014, 03:46 PM

shit works fine lol.

w00t692 · 03-21-2014, 03:47 PM

Quote:

Originally Posted by stugray

Whoa! wait. I dont see dual springs in that pic above.

These engines dont have dual springs?
I thought valve float was an issue above ~6k unless you had dual springs....

my si revs to 8600 rpms safely with 55 lb single springs...

Now i rev to 9000 rpms with 88lb dual springs.

Superhatch · 03-21-2014, 03:49 PM

55k on my odometer and I don't think there has been any loss. I also don't notice any hesitation, or idle issues. I've been running 93/E10 pretty much the whole time aside from a couple tanks of 91 when in Iowa.

w00t692 · 03-21-2014, 03:50 PM

Basically my post was to say, single springs aren't really the limiting factor on revving high. It's more dependent on your camshafts and the springs ability not to coil bind and hold the seat firm.

teamturbo · 03-21-2014, 05:18 PM

Quote:

Originally Posted by supramkivtt2jz

...... what is scary about it?

All that fog! I've read the stuff can damage O2 sensors, etc. Maybe I'm just talking out of my ass...

supramkivtt2jz · 03-21-2014, 05:28 PM

Quote:

Originally Posted by teamturbo

All that fog! I've read the stuff can damage O2 sensors, etc. Maybe I'm just talking out of my ass...

negative. it wont hurt anything.

mike the snake · 03-21-2014, 10:26 PM

On intakes that are REALLY clogged up with carbon buildup, I wondered whether Seafoam might break large chunks of carbon loose that then find themselves stuck in, or clogging up the catalytic converters.

I did read that the stuff works. On DI-only cars, it can't be added to the fuel because no fuel touches the intake ports or valves, so it needs to be sprayed into the intake, upstream of the valves.

mrk1 · 03-22-2014, 12:34 AM

Run a catch can and drive it like its meant to be, let it warm up. I'm not a fan of any of those sea foam cleaners.

Even with the port injectors I believe we will see problems with these motors and build up when they are older and higher miles.

Poodles · 03-22-2014, 01:14 AM

Read the MSDS on Seafoam and you'll know why it's in a steel bottle instead of aluminum...

(hint: I'll NEVER use the stuff)

mike the snake · 03-23-2014, 12:43 AM

With all the "snake oil" products on the market, Seafoam is one of the only products I've seen old-timers and knowledgeable people say actually works.

It has many uses, as a gas and oil stabilizer for storage, engine and trans cleaner (I read about people adding it just before rebuilding or working on stuff because it cleans everything so well). It also works to soften and remove carbon on valves and combustion chambers.

It does work.

That said, I wouldn't use it on my new car personally.

Poodles · 03-23-2014, 02:55 AM

Has a million uses...uses that destroy engines, transmissions, catalytic converters...

Mikem53 · 03-23-2014, 10:33 AM

Quote:

Originally Posted by stugray

Whoa! wait. I dont see dual springs in that pic above.

These engines dont have dual springs?
I thought valve float was an issue above ~6k unless you had dual springs....

It's Dependent on the weight of the valve.

03-21-2014, 03:49 PM	#19
Superhatch AIM4APX Join Date: Jun 2012 Drives: 2013 WRB BRZ Limited Location: Milwaukee Posts: 1,206 Thanks: 642 Thanked 749 Times in 324 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	55k on my odometer and I don't think there has been any loss. I also don't notice any hesitation, or idle issues. I've been running 93/E10 pretty much the whole time aside from a couple tanks of 91 when in Iowa. __________________ "It's very difficult to present technology as an overtly positive sales device to people who want an emotional car" -Chris Harris

03-22-2014, 12:34 AM	#24
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 21 Post(s) Tagged: 2 Thread(s)	Run a catch can and drive it like its meant to be, let it warm up. I'm not a fan of any of those sea foam cleaners. Even with the port injectors I believe we will see problems with these motors and build up when they are older and higher miles. __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

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03-21-2014, 03:39 PM	#16
stugray Banned Join Date: Sep 2013 Drives: 2013 GBS BRZ Limited Location: Colorado Posts: 1,925 Thanks: 627 Thanked 1,445 Times in 711 Posts Mentioned: 41 Post(s) Tagged: 0 Thread(s)	Whoa! wait. I dont see dual springs in that pic above. These engines dont have dual springs? I thought valve float was an issue above ~6k unless you had dual springs....

03-21-2014, 03:46 PM	#17
w00t692 Senior Member Join Date: Oct 2013 Drives: 2008 Civic Si Location: United States Posts: 111 Thanks: 7 Thanked 29 Times in 24 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	shit works fine lol.

03-21-2014, 03:50 PM	#20
w00t692 Senior Member Join Date: Oct 2013 Drives: 2008 Civic Si Location: United States Posts: 111 Thanks: 7 Thanked 29 Times in 24 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Basically my post was to say, single springs aren't really the limiting factor on revving high. It's more dependent on your camshafts and the springs ability not to coil bind and hold the seat firm.

03-21-2014, 10:26 PM	#23
mike the snake Senior Member Join Date: Jul 2013 Drives: 2013 BRZ Location: Norcal Posts: 1,592 Thanks: 1 Thanked 623 Times in 378 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	On intakes that are REALLY clogged up with carbon buildup, I wondered whether Seafoam might break large chunks of carbon loose that then find themselves stuck in, or clogging up the catalytic converters. I did read that the stuff works. On DI-only cars, it can't be added to the fuel because no fuel touches the intake ports or valves, so it needs to be sprayed into the intake, upstream of the valves.

03-22-2014, 01:14 AM	#25
Poodles Senior Member Join Date: Oct 2013 Drives: 2015 Series.Blue Location: Fort Worth, TX Posts: 1,781 Thanks: 88 Thanked 781 Times in 481 Posts Mentioned: 16 Post(s) Tagged: 0 Thread(s)	Read the MSDS on Seafoam and you'll know why it's in a steel bottle instead of aluminum... (hint: I'll NEVER use the stuff)

03-23-2014, 12:43 AM	#26
mike the snake Senior Member Join Date: Jul 2013 Drives: 2013 BRZ Location: Norcal Posts: 1,592 Thanks: 1 Thanked 623 Times in 378 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	With all the "snake oil" products on the market, Seafoam is one of the only products I've seen old-timers and knowledgeable people say actually works. It has many uses, as a gas and oil stabilizer for storage, engine and trans cleaner (I read about people adding it just before rebuilding or working on stuff because it cleans everything so well). It also works to soften and remove carbon on valves and combustion chambers. It does work. That said, I wouldn't use it on my new car personally.

03-23-2014, 02:55 AM	#27
Poodles Senior Member Join Date: Oct 2013 Drives: 2015 Series.Blue Location: Fort Worth, TX Posts: 1,781 Thanks: 88 Thanked 781 Times in 481 Posts Mentioned: 16 Post(s) Tagged: 0 Thread(s)	Has a million uses...uses that destroy engines, transmissions, catalytic converters...

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