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#3338131 - 04/09/14 08:17 PM New valve lifters installed....short OCI??
SuperEd73 Offline


Registered: 08/14/07
Posts: 207
Loc: Glen Cove, NY
Hello BITOGers,

It has been a while since I've posted but I now have a question where I'd like to get some opinions.

My 2009 Pontiac G8-GT (L-76 6.0L V8 with active fuel management) just had new valve lifters installed by the dealer because the original set began to tick pretty noticeably upon startup and when the engine was cold. In order to reach the lifters on that engine, the intake manifold and cylinder heads were removed. So, new lifters, new head gaskets, new valve cover and intake gaskets as well as new oil and Dex-Cool.

With all of that said, should I do an early oil change, maybe 1,000-1,500 miles out, or should I just follow the OLM and not worry about it?

Thanks!

Ed B.
_________________________
09 Pontiac G8GT - 88,400 mi, Castrol Syntec 5W-30/Fram Ultra Synthetic Filter

68 Dodge Polara - 146,500 mi -

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#3338136 - 04/09/14 08:19 PM Re: New valve lifters installed....short OCI?? [Re: SuperEd73]
Eddie Offline


Registered: 12/07/03
Posts: 8117
Loc: Florida, Cape Coral
Follow the OLM whould be thee way I'd go. Ed
_________________________
CX5 Touring 2.5L :-)

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#3338155 - 04/09/14 08:31 PM Re: New valve lifters installed....short OCI?? [Re: SuperEd73]
901Memphis Offline


Registered: 08/14/10
Posts: 10829
Loc: Northern Kentucky
Engine was open and exposed to contamination, dump early.
_________________________
2002 Buick Century 125k - Built 4T65e(Maxlife) - Syn Frankenbrew + XG 3387A
1998 Nissan Altima 335k - 5MT - M1 HM 5w30/Fram Ultra XG7317+MOS+ATP 205

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#3338193 - 04/09/14 09:02 PM Re: New valve lifters installed....short OCI?? [Re: SuperEd73]
Ram01 Offline


Registered: 10/13/10
Posts: 908
Loc: New York Queens
Dump early and start using a hm oil

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#3338199 - 04/09/14 09:11 PM Re: New valve lifters installed....short OCI?? [Re: 901Memphis]
yonyon Offline


Registered: 03/06/12
Posts: 3492
Loc: NJ, USA
Originally Posted By: 901Memphis
Engine was open and exposed to contamination, dump early.


plus eleventy

The heads heads were off.

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#3338307 - 04/09/14 11:48 PM Re: New valve lifters installed....short OCI?? [Re: SuperEd73]
Merkava_4 Offline


Registered: 01/30/07
Posts: 14336
Loc: Clovis, CA
Originally Posted By: SuperEd73
My 2009 Pontiac G8-GT (L-76 6.0L V8 with active fuel management) just had new valve lifters installed by the dealer because the original set began to tick pretty noticeably upon startup and when the engine was cold.


Did the dealer happen to know WHY the lifters were ticking badly on cold startup ?

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#3338402 - 04/10/14 06:07 AM Re: New valve lifters installed....short OCI?? [Re: Merkava_4]
SuperEd73 Offline


Registered: 08/14/07
Posts: 207
Loc: Glen Cove, NY
Merkava,

Upon inspection they said the lifters showed excessive wear. But, GM has a long standing TSB out there regarding valve lifter wear problems on that series of engine. I also am on a couple of G8 owner forums and there are many reports of premature lifter failure. GM actually redesigned the lifters after my car was built. I managed to get over 80,000 on them before I really thought it was bad but other owners have reported lifter failures at much lower mileage totals.

Ed B.
_________________________
09 Pontiac G8GT - 88,400 mi, Castrol Syntec 5W-30/Fram Ultra Synthetic Filter

68 Dodge Polara - 146,500 mi -

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#3338515 - 04/10/14 08:51 AM Re: New valve lifters installed....short OCI?? [Re: SuperEd73]
meep Offline


Registered: 02/20/07
Posts: 2935
Loc: Southeast
I would do a half-interval OCI, then go to normal. I would not worry about HM oil.
_________________________
2006 Tundra 2wd
2002 MDX (wifey!)
2005 s60 2.4L

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#3338593 - 04/10/14 10:09 AM Re: New valve lifters installed....short OCI?? [Re: SuperEd73]
Oldmoparguy1 Offline


Registered: 01/21/05
Posts: 5069
Loc: Charlotte, NC
The lifters were worn?? What about the camshaft??
_________________________
Experience is a hard teacher, she gives the test before the lesson.
Oscar Wilde

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#3338594 - 04/10/14 10:10 AM Re: New valve lifters installed....short OCI?? [Re: SuperEd73]
Oldmoparguy1 Offline


Registered: 01/21/05
Posts: 5069
Loc: Charlotte, NC
The lifters were worn?? What about the camshaft??
_________________________
Experience is a hard teacher, she gives the test before the lesson.
Oscar Wilde

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#3339458 - 04/11/14 06:27 AM Re: New valve lifters installed....short OCI?? [Re: Oldmoparguy1]
SuperEd73 Offline


Registered: 08/14/07
Posts: 207
Loc: Glen Cove, NY
Well the lifters are the roller type so cam wear is not a problem (at least according to GM). I believe it is more of a problem with the lifters partially collapsing which is causing the ticking and in some cases I've heard about, it'll get bad enough where the engine starts throwing trouble codes.

Ed B.
_________________________
09 Pontiac G8GT - 88,400 mi, Castrol Syntec 5W-30/Fram Ultra Synthetic Filter

68 Dodge Polara - 146,500 mi -

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#3339958 - 04/11/14 04:13 PM Re: New valve lifters installed....short OCI?? [Re: SuperEd73]
TiredTrucker Offline


Registered: 01/04/08
Posts: 2353
Loc: Central Iowa
One of the problems with AFM equipped GM engines. Those lifters are oil controlled to shut off cylinders. The AFM actuators disallow, or allow, oil into the AFM lifters to either have them collapse and shut off that cylinder, or keep oil in the lifter to have them function normally. All it takes is some oil coking or deposits build up in those lifters and they start goofing up. I disabled the AFM right out of the gate when I bought my 2013 Silverado as a preemptive strike against these kinds of failures.

Agree with most here... if the engine is opened up, dump oil early. I dump early on a new engine from the factory. Just me.
_________________________
In order to know what is bad, you have to know what is good. The question them becomes, what is the source of knowing what is good?

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