That is very odd. I am interested to see if adjusting the valves resolves your issues. Good luck.

 

well i hooked up compressed air to #1 cylinder at TDC and air is leaking out of the intake so im pretty sure i have bent valves so im getting a valve job done on monday for that head and hopefully that will fix it. also i noticed texas speed sent me 5.7 head gaskets so i dont know if those are hurting anything or not. but i guess theres nowhere i can buy 1 head gasket so i'll have to buy a set again for 6.0's?

 

Or you have the lifter preload set too high..... Perhaps the valve(s) are holding open?

 

Valve job done, $200 dollars wasted... its still got blow by and its still got low compression on the whole left bank and its still ticking for about five mins and then stops i guess its a broken ring making the noise but i dont know why that whole side is bad and the other is perfect? still has random misfire and o2 codes i guess the low compression throws off the misfire code?

Where can i buy piston rings set?

 

If you want you can come by my house and I could log your truck for you see if your o2 sensors are even working. Try putting a couple of squirts of oil in the spark plug hole then do a compression test, supposedly if your compression goes up then you have bad rings...

 

Where in Arlington are you located?

 

I put oil in the low cylinders and compression numbers didnt change at all... thats why i thought it was the valves? and its not burning any oil?

 

right off cooper st. by UTA.

 

You could try taking off the rockers and doing a compression check. That would eliminate a bad cam/push rod/etc and leave you with rings....

 

This is the best suggestion yet, If no blowby then you have your valves misadjusted.