DOD shut off

Tech discussions on the L77 6.0L V8.
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cerbomark
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DOD shut off

Post by cerbomark » Thu Oct 11, 2018 1:00 pm

Does and computer shut off of the DOD correct the potential lifter issues?
Last edited by cerbomark on Fri Oct 26, 2018 12:37 pm, edited 1 time in total.
2016 C1

CrashTestDummy
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Re: DOD shut off

Post by CrashTestDummy » Thu Oct 11, 2018 1:42 pm

No.
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cerbomark
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Re: DOD shut off

Post by cerbomark » Thu Oct 11, 2018 1:48 pm

Thanks. and what s the earliest mileage the issue could show up on with a low mileage/hour car?
If you hd to make a bet, LOL
2016 C1

CrashTestDummy
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Re: DOD shut off

Post by CrashTestDummy » Thu Oct 11, 2018 6:36 pm

46K and change miles. That's what our '12 had on the clock when the cam and two lifters were replaced.

It can happen at any time, basically. Our '10 Tahoe has been fine for 110+K miles, so far. There are some vehicles that never have an issue, yet others that eat lifters like candy.

Lifters seem to be a weak spot on the LS* line of engines. Even the 'trick' LS7 lifter upgrade doesn't completely guarantee you of trouble-free miles. DOD-delete kit install will help things a lot, but there are still no guarantees.
Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2010 Tahoe PPV (her car)
1995 DGGM Impala SS
1996 BBB Impala SS (11-second DD)
1985 Firebird - 310 LS1 C Prepared autocross car.
And some others
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kevink
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Re: DOD shut off

Post by kevink » Fri Oct 12, 2018 3:34 pm

cerbomark wrote:Thanks. and what s the earliest mileage the issue could show up on with a low mileage/hour car?
If you hd to make a bet, LOL
I wouldn't trust those lifters at all. Get them out of there! Anything can happen, and then you'll be left with metal fragments throughout your engine.

cerbomark
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Re: DOD shut off

Post by cerbomark » Thu Oct 25, 2018 1:26 am

CrashTestDummy wrote:No.

I was told by a tuner and former chevy tech that turning DOD off by tune does prevent the lifter issue related to the 4/8. Don t know but with a lot of warranty left I ll either leave it for now or grab a Ranger AFM delete device. I think the warranty on the engine is either 5/6 years and 100K.
Thoughts? That ranger device is now 140 new.
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Mooseman
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Re: DOD shut off

Post by Mooseman » Thu Oct 25, 2018 2:08 am

The failures on the first engines with DOD were the lifters failing to re-activate and remain collapsed. GM did some revisions of lifter design to correct this issue as well as oil consumption with a new VLOM. On these newer engines, the failure seems to be more of the pitting of the roller and damage to the cam.
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CrashTestDummy
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Re: DOD shut off

Post by CrashTestDummy » Thu Oct 25, 2018 4:40 pm

cerbomark wrote:
CrashTestDummy wrote:No.

I was told by a tuner and former chevy tech that turning DOD off by tune does prevent the lifter issue related to the 4/8. Don t know but with a lot of warranty left I ll either leave it for now or grab a Ranger AFM delete device. I think the warranty on the engine is either 5/6 years and 100K.
Thoughts? That ranger device is now 140 new.
While anecdotal, I don't have the vehicles right in front of me, or know their exact history and level of maintenance, but I still read posts of people who tune out or disable DOD on their vehicles (cars and trucks), and still have failures. So maybe they were already close to failure anyway, and even after the tune the things failed anyway.

If I was to do it, I'd just go with a cam and lifters (and probably springs, since we're in there), and then tune the DOD out.
Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2010 Tahoe PPV (her car)
1995 DGGM Impala SS
1996 BBB Impala SS (11-second DD)
1985 Firebird - 310 LS1 C Prepared autocross car.
And some others
Do YOU have my SPID?

cerbomark
Posts: 65
Joined: Tue Oct 02, 2018 10:37 pm
Location: upstate NY

Re: DOD shut off

Post by cerbomark » Fri Oct 26, 2018 7:43 pm

Today I ordered the Ranger AFM plug in disabler. They stated that the latest version has no battery drain when parked for long periods and no dash light will be set off. Those were old issues that have been reported. I guess I ll be the test dummy!
2016 C1

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