steven Posted January 3, 2008 Share Posted January 3, 2008 well i have a 6.0 on voodoo came in for no start found old oil filter base stuck in bottom of housing. after it finally started found missing on 3 cylinders. also noticed alot of oil on cold side cac tube. so i did a crankcase pressure test 11 in called bert and ernie and the told me to remove turbo and rerun crank case pressure test like thats real easy on an 03 so i did it and it dropped to 8-9 inches so next is a manual compression test found low cylinder 290 high cylinder 360 so tore the engine down cant find any thing wrong three cylinders had light valve contact so i filled the heads with diesel and all the valves hold next i remove the valves and none are bent protrusion is good and taper is at outerlimits of spec but still in spec. only thing i have found is one lifter out of the front 8 was missing the clip and it fell apart only after i taken it out of engine. cross hatches still present no mods at all air filter weighs 4 oz more than new one im scrathing my head what am i over looking i know it has to be something stupid my only thinking is that the lifter clip came out and rolled down camshaft and made the valves hit i would really like to know why compression is way off and any other thaughts thanx steve Quote Link to comment Share on other sites More sharing options...
DwayneGorniak Posted January 3, 2008 Share Posted January 3, 2008 Have you rolled every piston to top dead centre and seen if you have any bent rods? Was the crankcase overfull? Quote Link to comment Share on other sites More sharing options...
Aaron_Johnson Posted January 3, 2008 Share Posted January 3, 2008 Was the lifter collapsed? Did you do a leakdown check prior to tearing it down? Possible bent rods as Dwayne says or broken rings? Quote Link to comment Share on other sites More sharing options...
steven Posted January 3, 2008 Author Share Posted January 3, 2008 i have checked all cylinders for bent rods cant see any also i did not perform a leakdown test before tear down how ever the oil level was good but it was changed 20 miles before it got to me. the lifter doesnt appear collapsed just the spring clip gone Quote Link to comment Share on other sites More sharing options...
Matt Posted January 16, 2008 Share Posted January 16, 2008 I had one that only had a max of 200psi on one whole bank. The block ended up being warped. If I cranked it over till a piston was halfway down the bore you could actually see the rings on the pistons and could move the piston around in the bore. I assume if yours was like this you would have noticed. Quote Link to comment Share on other sites More sharing options...
steven Posted January 17, 2008 Author Share Posted January 17, 2008 after further inspection found broken rings and a chewed up cam and crank.over hauling it now as soon as rings come off back order. short block put us over cost cap and we are high already got to do it the cheap way got to love it. Quote Link to comment Share on other sites More sharing options...
Tony302600 Posted January 17, 2008 Share Posted January 17, 2008 cheap way = room for problems IMO Quote Link to comment Share on other sites More sharing options...
Jim Warman Posted January 17, 2008 Share Posted January 17, 2008 I have to agree, Tony... doing it Stevens way has too much chance of creating a hobby instead of fixing a truck... Not picking on you, Steve... but there comes a time when you have to look the boss in the eye and say "I ain't gonna do that...". If I was going to set out on the adventure you're planning, I'd be in there with a cylinder bore gauge and a magnifier. Quote Link to comment Share on other sites More sharing options...
ktmlew Posted January 17, 2008 Share Posted January 17, 2008 Quote: short block put us over cost cap and we are high already got to do it the cheap way got to love it.[/quote] I have to agree, Tony... doing it Stevens way has too much chance of creating a hobby instead of fixing a truck... Not picking on you, Steve... but there comes a time when you have to look the boss in the eye and say "I ain't gonna do that...".If I was going to set out on the adventure you're planning, I'd be in there with a cylinder bore gauge and a magnifier. The comment about being "high" on the 126 isn't HIS problem. IF he fixes this thing and it comes back in 4 months knocking guess who will be fixing it for FREE!!! Can guarantee you the SM will be fuzzy on the details about why you didn't do it RIGHT the first time. The SM WILL make you the scapegoat...if HE wants to keep HIS job. /forums/images/%%GRAEMLIN_URL%%/poke.gif /forums/images/%%GRAEMLIN_URL%%/hitthefan.gif Quote Link to comment Share on other sites More sharing options...
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