Excessive Carbon build up V6

[abc123]

Originally Posted by birdman69

Is this TSB#10-033 In Canada as well

I don't know if these TSB's are country specific, but the Accord vehicles covered by TSB 10-033 are 2008 - 2010 Accord V6 with automatic transmission and all 2010 Accord Crosstours. At 87,000 KM you are obviously out of warranty, but worst case at least you could get the fix.

Originally Posted by birdman69

anyone know the torque specs for the plug and coil

Well that's interesting, the TSB says 16ft/lbs for the spark plugs, while the Honda V6 Supplement service manual says 13 ft/lbs. The coil is 8.7 ft/lbs.

[Edaccord08]

Originally Posted by birdman69

Is this TSB#10-033 In Canada as well I called my Honda Dealer and they said no TSB for my 2010 V6 only I4 and never hear of this problem before VCM would do the exact opposite and those cylinders would be clean due to less use and mainly HWY driven cars would not have carbon build up

looks like I might be on my own and change the remaining 5 plugs anyone know the torque specs for the plug and coil the service manual sticky only shows I4 the TSB says 16lbs for the plug is that right and what about the coil?? I prefer to torque no just hand tight an a bit

The coils are only held in by small nut, spec 8.7Ft/LB and spark plugs for V6 are 13 ft/lb's .
Also these are same specs for 2.4L .

PS: got specs from Chilton online manuals , if Honda says differently, use Honda values but 1 or 2 ft/lbs won't change anything .
Edit: I don't have V6 honda manual but there is one for 2.4L and it says 8.7ft/lb for coils and 13 ft/lbs for spark plugs so use those values .

[birdman69]

Ok I just pulled plug 3, 4 and 6
plug 4 covered in carbon plug 6 not too bad plug 3 only a bit better than 6 I wonder if they only cleaned the plug and charged me for a new one only 360KM since they changed it already have sighs of carbon deposits ?? it had no rust ring at the porcelain like the other too any thoughts I will change all plugs today an already put a Motomaster Ultra Fule system treatment in says it remover carbon cleans injectors etc could not find seafoam

[Edaccord08]

make sure there no firmware updates available as the 10-033 is suppose to help here . Even in Canada I would ask about it .

[birdman69]

it took a wile they found the SB the call it V-710 I will need to call honda canada since i had the repair done at an Acura dealer not sure where it will leave me with changing the other 5 but like I say plug 4 covered in carbon its only a matter of time

[mt_goat]

Originally Posted by birdman69

Is this TSB#10-033 In Canada as well I called my Honda Dealer and they said no TSB for my 2010 V6 only I4 and never hear of this problem before VCM would do the exact opposite and those cylinders would be clean due to less use and mainly HWY driven cars would not have carbon build up

I think what they are missing is those VCM pistons are still going up and down, and even though there is no fuel (or spark I don't know) there is still oil present to lubricate the rings. My theory is the oil builds up a bit but doesn't always have the combustion to keep it burned off. Probably worse on some engines than others depending on the tightness of the rings.

I think the TSB reprograming of the ECU in the newer models starting using either 3 cylinders from one bank or the 2 outside cylinders from both banks (4 cyl) to help distribute the "off" cylinders around and help lessen the carbon buildup to any one cylinder.

[Artema]

I need to look into a carbon cleaner. I saw a mechanic clean my brother's old 1997 Accord one time, I think it was in 2004, and wow. It looked like it was caked with the crust off a burned steak. It was thick and constricting.

[kvndoom]

My stepdaughter's 96 TL probably needs this too. From my reading, they tended to gunk up around 150000 miles or so. She has around 170k on her car, and she's getting a P0401.

I've bought some seafoam already... I'll probably do it this weekend coming up.