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Kevlar 06-18-2013 05:00 PM

Combustion chamber cleaner
I have a 4.7 HO Overlander 2002 it has a problem and I am looking for some advice. It has a misfire at cylinder No1. Must admit I don't want to dive in yet and remove cylinder heads to get at the valves. I heard about combustion chamber cleaner as a start. It has low compression at this cylinder down to 120 the engine warning light is on. No bad noises from within the engine it sounds great other than this slight problem.
Starts perfect no smoke has been converted to run on LPG.
Any advice would be appreciated as I would like to restore this great beast to its former glory.
Thanks Kevlar

Trav1s 06-18-2013 05:23 PM

Re: Combustion chamber cleaner
I am not sure how you would used a combustion chamber cleaner other than running in through the intake or through the fuel system. I have used BG44K and Seafoam on my vehicles - both through the fuel system and a bit through the intake through a vacuum hose. Both will break down carbon build-up in the engine. I used Seafoam in the gas in a 1966 John Deere 110 tractor with an 8 HP Kohler motor. It cleaned up the carbon so well that it caused the old head gasket to leak. These are a "do at your own risk" procedures.

Frango100 06-19-2013 07:02 AM

Re: Combustion chamber cleaner
You can try a seafoam treatment and see if that helps. When not, remove the cylinder head cover and check for a fallen of rocker arm. Carbon buildup on the valve stem could let it hang up a bit, with as a result that the rockerarm can just simply fall of. An other possibility is a dropped valve seat, which also causes the rocker arm to fall of.
Here you see how to seafoam it:

hoffmanestates 06-22-2013 09:43 AM

Check spark plug if cylinder 1 is low its possibly time for gasket

Sent from my LG-P999 using Tapatalk 2

Kevlar 06-22-2013 02:51 PM

Re: Combustion chamber cleaner
Hi Travis
Thanks for the reply.
Got me scared now was looking for a quick easy fix to my problem but now not sure about this sea foam may just dive in and rip it apart. will post my decision.
thanks Kevlar

Kevlar 06-22-2013 03:05 PM

Re: Combustion chamber cleaner
hi Hoffmanestates
Thanks for the reply, for the hell of it I will try a new spark plug and a coil pack to cylinder 1 but think you are correct about gasket, am also worried about valves or valve seat apparently the seat can also drop out. sounds bad a.
Will post the outcome.

Thanks Kevlar

Kevlar 06-22-2013 03:46 PM

Re: Combustion chamber cleaner
Hi Frango100
Great reply I am up for trying anything rather than removing cylinder heads so am now going to try sea foam after seeing those posts you put me on to. Nothing to lose or do I. what further damage can it do, fix it or not ?
Will let you no the outcome

Thanks Kevlar

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