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Combustion chamber cleaner

5K views 6 replies 4 participants last post by  Kevlar 
#1 ·
Hi
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
 
#2 ·
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.
 
#3 · (Edited)
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: http://www.jeepgarage.org/f62/sea-foam-treatment-24734.html
 
#6 ·
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
 
#7 ·
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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