lb7 headgasket

[chevy791979]

was wondering MAX amount on cyl head you can take off lb7.
i have worked on these trucks for a living for a long time and never new/cared til mine got torn down. this truck makes me money pushing snow so i cant afford to have anything else go wrong that could have been done now. sooooooo im doing all the cups turbo oil line gaskets(mild leak) studs , blah blah blah. also last night took pass sied head off saw #7 piston was beat up......and CLEAN aka my cooland leak. ran the VIN never had inj in it so i dont think the piston "damge" was from a nozzle gernading or anything but ive seen this before alot for over fueling but never from just injested cooant.........................

 

[chevy791979]

no?????????????/

 

[Sledhead]

I am no expert on this matter but did successfully take .003" and .005" off mine without recessing the valves. IIRC .008" is a max but not sure if that is with or without needing to do the valves.

 

[Chevy1925]

if your injector had ever stuck open or has high balance rates, it can cause piston damage. the tip doesnt have to blow up to do it

 

[Atouchofgrass]

Being that you have an lb7, i'm willing to bet their is a bad injector(s) if your're saying the spray pattern is that bad.

 

[super diesel]

Hard to say what got in there to beat it up. I ended up with one of those too. Never found the reason or where it came from unfortunately . Make sure the head and deck is flat too to get the thing to seal up good.

 

[madmatt]

Hard to say what got in there to beat it up. I ended up with one of those too. Never found the reason or where it came from unfortunately . Make sure the head and deck is flat too to get the thing to seal up good.

Holy heck where did this guy come from???? lol nice to see u back Michael,, :thumb:

 

[chevy791979]

got her started last night runs great. and no more white smoke......... had to take .006 of the heads cuz the last JACKASS to have these heads off took a diegrinder sanding disk to the head. and the cylinder that had the leak neede some work.New valves and springs seals............ balance rates are good(for now)

 

[Sledhead]

Good job :thumb:, did you determine what the maximum is that can removed?

 

[chevy791979]

.007 is not too much....... lol :roflmao: