Looking for info

94FormulaBird · 01-10-2015, 03:30 AM

So dads truck, 08ish silverado 5.3, has developed a slight skip from time to time:..usually around/just leavin idle..dealer though it was an Injector..pulled plugs and found one nasty one..scoped the cylinder to find good bit of oil...so they tell him the aluminum block engines can't be rebuilt...and quote $9k in parts and labor for new engine...he leaves...calls me...I tell him to go back and cus them out..he doesn't...says he's just gonna change the plug every oil change and keep goin...

Could be simple as valve guides?...rings or ringland?....

Thoughts and or next step?

BAD BOB · 01-10-2015, 09:32 AM

I believe that is sometimes caused by the displacement on demand. When it disables those cylinders I think it causes it to pull oil up on the piston and not burn it. May want to call JP and ask him if that's a possibility. If so he could turn it off and you may run a good injection cleaner through it to see if it will clean it up and see where it goes from there

98Camarod · 01-10-2015, 01:12 PM

Yep, most likely it's the DoD. My buddy has an 09 and it burnt a quart of oil every 1k miles due to it. I turned off the DoD and no more burning of the oil. He lost 2mpg, but that's it.

94FormulaBird · 01-10-2015, 06:15 PM

What all is involved in turning it off?

schardbody · 01-10-2015, 08:03 PM

Very common in the dod trucks but usually not bad enough to cause a misfire. IT could have been unburnt fuel in the cylinder instead of oil. Valve springs are very common on them as well.

not saying it's not oil just thinking.

04ctd · 01-10-2015, 08:09 PM

and i think you can get a junkyard motor very cheap....def not $9k....

98Camarod · 01-10-2015, 10:34 PM

Quote:

Originally Posted by 94FormulaBird

What all is involved in turning it off?

Licensing it and disabling the DoD

01-10-2015, 03:30 AM	#1
94FormulaBird Senior Member Join Date: Jun 2008 Location: Goose Creek Posts: 763	Looking for info So dads truck, 08ish silverado 5.3, has developed a slight skip from time to time:..usually around/just leavin idle..dealer though it was an Injector..pulled plugs and found one nasty one..scoped the cylinder to find good bit of oil...so they tell him the aluminum block engines can't be rebuilt...and quote $9k in parts and labor for new engine...he leaves...calls me...I tell him to go back and cus them out..he doesn't...says he's just gonna change the plug every oil change and keep goin... Could be simple as valve guides?...rings or ringland?.... Thoughts and or next step? __________________

01-10-2015, 09:32 AM	#2
BAD BOB Senior Member Join Date: Mar 2008 Location: SUMMERVILLE Posts: 3,681	I believe that is sometimes caused by the displacement on demand. When it disables those cylinders I think it causes it to pull oil up on the piston and not burn it. May want to call JP and ask him if that's a possibility. If so he could turn it off and you may run a good injection cleaner through it to see if it will clean it up and see where it goes from there __________________ IM BAD BOB Last edited by BAD BOB; 01-10-2015 at 09:42 AM.

01-10-2015, 06:15 PM	#4
94FormulaBird Senior Member Join Date: Jun 2008 Location: Goose Creek Posts: 763	What all is involved in turning it off? __________________

01-10-2015, 08:09 PM	#6
04ctd Senior Member Join Date: Aug 2009 Location: Ladson SC Posts: 4,388	and i think you can get a junkyard motor very cheap....def not $9k.... __________________ 1 Timothy 3:16 16 And without controversy great is the mystery of godliness: God was manifested in the flesh, Justified in the Spirit, Seen by angels, Preached among the Gentiles, Believed on in the world, Received up in glory.

01-10-2015, 01:12 PM	#3
98Camarod Senior Member Join Date: Mar 2009 Location: Summerville, SC Posts: 1,525	Yep, most likely it's the DoD. My buddy has an 09 and it burnt a quart of oil every 1k miles due to it. I turned off the DoD and no more burning of the oil. He lost 2mpg, but that's it.

01-10-2015, 08:03 PM	#5
schardbody Senior Member Join Date: Sep 2008 Posts: 1,158	Very common in the dod trucks but usually not bad enough to cause a misfire. IT could have been unburnt fuel in the cylinder instead of oil. Valve springs are very common on them as well. not saying it's not oil just thinking.