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Old 06-02-2007, 01:06 PM
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GMPP 454 sucking oil

Okay. today I go for a little cruize in the 59.
This car has a 454 HO roller GMPP engine in it.
My oil pressure drops to 12 right out of the drive,
Then comes up to about 28 while cruizing, drops to
14-15 under accelleration.
Go fill up the tank and check the oil.---WAY LOW,
not even on the stick!. Okay, soon as I get home,
I need to look into a couple of things.

I have posted before that I cannot get more than
8" vacuum at idle (brakes want 18) and this thing
is sucking oil like no tommorrow. Car is still hot
So I am here before pulling plugs.

(I have only 2600 mi on this engine, and the only things
I have changed on it have been the pan and valve
covers. No other bolts have been loosened or removed.)

I stick a finger into one of the tailpipes----Soaked
with wet oil. Despite the fact that I have had this
engine 2yrs and it has only been in 'service' for 1yr.
exactly. Does anyone here think that this should be
a warranty issue??? This is Saturday, so I cannot
locate a warranty person anywhere (GM dealer-Parts--
--Summit---GMPP)
Not that I am leary of cracking this thing open---just
don't want to. I'm pretty much convinced that I have a
manifold leak, as I don't thing valve seals or guides
would let that much oil past in the 1500mi on this oil.
3-4 qts is a LOT of oil in 1500mi! Nor do I think the
guides or seals would be a factor in super low manifold
vacuum.

Anyone else have this issue with a GMPP engine????

Bryan


on a good note---AC is working great, and temps stay below 200

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Old 06-02-2007, 01:31 PM
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I`d agree it`s a intake leak as I suspected before on your other post. However, after the problem is corrected, you`ll have to go back and retune everything. The leak is knocking everything off from idle mixture to cruise mixture. I`d contact GM about it, but it`s hard to say if you`ll get anywhere, cause they`ll say "why didn`t you contact us when the problem began?"
or if you raise enough cane, they may do something about it. I wouldn`t run it like that, as there maybe danger of doing more damage.
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Old 06-02-2007, 09:45 PM
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Hey Bryan, I'm really sorry to hear that you're having problems with that "very impressive" engine. If I were you, I'd raise hell about that motor only being is service for one year, , it has to be covered by some sort of warranty!!! How many mile have you put on it in a year?
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Old 06-03-2007, 08:04 AM
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odometer reads
2654
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Old 06-03-2007, 10:04 AM
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Hey Bryan,Paulo here.In my opinion the low vacuum is an indication of a possible internal leak,pulling oil slowly and burning it.Could be the manifold.Maybe incorrect gaskets... R port,oval gaskets,vice-versa... With that little vacuum the brake pedal should be too hard.
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Old 06-04-2007, 04:26 PM
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For those of you interested I will post a link to my post at the Chevelle place

I still intend on locating some GM Warranty people. The number Summit gave me was to Pace Chevrolet, and that guy pretty much told me tough chit!

So now I will check out some pricing for PROPER machining and get ready for my work travel to begin in earnest (gotta go to NY this week for a while).

This is my thread at 'Chevelles'

http://www.chevelles.com/forums/showthread.php?t=179419


This is 69-chvl's nightmare-----with pics

http://www.chevelles.com/forums/show...=chipped+crank


Bryan
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Old 06-04-2007, 08:13 PM
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Intake leak, sucking oil from the lifter valley, also wrecking vacuum.

Vince
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Old 06-04-2007, 08:26 PM
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Vince----that will be my first course of action.
Be a couple of weeks before I get to it though.
Gotta go to Syracuse for a while this week.

(kinda playing devils advocate here---letting the worst case scenario set in before resignation sets in---softens the blow)

Bryan
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Old 06-05-2007, 09:43 PM
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Did you check the motor over before installing it. I know from experience that a lot of things get missed on the assembly at gm, especially in the heads and valvetrain. GM fought a warranty claim on a 572 crate motor all the way to court and GM had to buy back the motor plus atty. fees. (I know this for a fact, I sat in on the trial) Improperly torqued rockers (by GM) were the culprit of a 20 minute life span. If it truly is there defect, I bet they will fix it, it might just take a little heat. It's not right, this guy spent $16k on a motor and GM tried to get by with offering a "rebuilding". The judge said he didn't purchase a rebuilt motor and didn't think he should have one because of their screw-up. If you need any help send me a PM.

Last edited by DaSouthWon; 06-05-2007 at 09:53 PM.
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Old 06-06-2007, 07:55 AM
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Any GM Performance Parts dealer should be aware of the oil ring issues with your engine. Incorrect rings and/or installed upside down.
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Old 06-06-2007, 08:22 AM
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I read in another Forum that some of the 502's are having serious Ring issues-can't remember the specifics, but as I recall it had something to do with the Ring Pack-don't know if it includes 454's though-
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Old 06-06-2007, 11:14 AM
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Quote:
Originally Posted by lmsport
Any GM Performance Parts dealer should be aware of the oil ring issues with your engine. Incorrect rings and/or installed upside down.
I was gonna bring this up, heard this a few times on some of the other forums. Might be worth looking into?
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Old 06-06-2007, 01:03 PM
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Bryan , I too have a 454 ho crate motor that used lots of oil. in fact you answered a post back in March that I had on this site. It turns out that all I did was pulled the heads and went to teflon valve seals. I also powdercoated the intake inside and out just in case the manifold was leaking through. Result? No smoke and no oil usage through the first two tanks of gas. I sure hope that I fixed it but only time will tell!
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Old 06-06-2007, 05:15 PM
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Car junkie,

Today I got hold of GM powertrain center
This guy was very nice and actually listened to me.
Took down all the info and he said he will get back to me tomorrow (i hope)
He understood that the warranty was gone, but would escalate to the higher-ups.
I explained that I had this thing over a year before it even hit the pavement, and he agreed that the oil consumption was too high.

When I return from Syracuse next week, I will change the intake gaskets and check the vacuum.
I have been snooping for a machine shop here, to get the seals done and probably the block plate honed

Bryan
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Old 08-31-2007, 04:02 PM
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Quote:
Originally Posted by lmsport
Any GM Performance Parts dealer should be aware of the oil ring issues with your engine. Incorrect rings and/or installed upside down.

After the intake not seating correctly------the guy I took the engine to, found upside-down rings on all 8 cylinders.

(See the chimps build an engine)

After my 3rd trip for brakes in my new Ranger, I am beginning to have serious doubts as to the competence of these people building things.

Anyway----got a question here----have some pics.
The center tab on my valley baffle rests on a 'sealing area' of the head. There is absolutely no way in God's green earth the intake can seat like this.
(see more chimps)
How critical is it to seal that "cave" just below the exhaust crossover?

I am considering either trimming the valley baffle----or trim the gasket around the tab.
The tabs at the front and rear are not a problem----there is a relief in the gasket and the intake.

Open to suggestions

Bryan

BTW----will be calling GM AGAIN about warranty crap.

As I see it, this should not fall into 'out of date' warranty issues.
The damn engine was not marketable to begin with.
If my builder found nothing wrong, I would just dissappear, but this thing was destined for replacement right out of the gate!!!!!
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