C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Opinions on " Settling " needed???

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Old 05-30-2011, 03:12 PM
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TJM
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Default Opinions on " Settling " needed???

We finally cranked the car up and drove it some, last week. Sent it off for paint.

The concern is the amount of blow by. There is lots, I mean Lots. This did make it REAL easy to find a weak valve cover gasket when oil puked out!!

No PVC system, just two breathers. And, it didn't do this on the dyno stand during break in?

My partner [ engine owner ] disagrees with my concern that the engine is cocked low to the drivers side, almost 3/4" !! Randall thinks it needs to " settle ".

Drives me nuts and it's a short trip for me? Everything else is dead level.

I believe with the motor cocked over, the Moroso 7qt will let oil up past the baffles and the crank is spanking it = Lots of oil vapor.

Again, it's his motor, but what do the experts think?

I think new motor mounts and a level motor makes the problem go away. Something along the lines of Energy insert type is in our immediate future [ or a new motor very soon].

Opinions on " Settling " needed???

TJM
Old 05-30-2011, 03:24 PM
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oldalaskaman
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you dont say the year, but on the few of these I've worked on , there is no settleing, everything is direct contact, maby you need a different partner
Old 05-30-2011, 03:34 PM
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87 vette 81 big girl
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The engine got tore up & fried on the engine dyno is my guess.

Engine seen massive amounts of detonation for some reason.

You maybe knocked all the molybdenum from the Top piston ring.
Cylinder walls & piston skirts likely tore up too.

Fried.

The engine has no ring seal left & is pumping oil into the combustion chamber.

Motor mount issues ?
Have to figure that out on your own.

You don't have a good running race motor no longer.
Its now a ticking time bomb waiting to grenade apart and oil the racetrack down & **** the track officials off.

BR
Old 05-30-2011, 03:45 PM
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oldalaskaman
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3/4" wont cause that, did you change oil after dyno?
Old 05-30-2011, 04:48 PM
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hgh pwr
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i agree with the above,pull it now! before it really goes,should not be burning massive amounts of oil at this point.
Old 05-30-2011, 05:06 PM
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coupeguy2001
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1. make sure the dip stick is the right one for the pan. you might have too much oil in it.
2. perform a compression check. the low cylinders are the target.
3. make sure the breathers actually breathe. I have seen some that look good, but the actual vent path is rather small.
4. be certain that the oil isn't 5W20 break in oil
5. I would use 10-30 or 10 -40 depending on what you are using for oil and clearances
Old 05-31-2011, 03:26 PM
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TJM
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Originally Posted by coupeguy2001
1. make sure the dip stick is the right one for the pan. you might have too much oil in it.
2. perform a compression check. the low cylinders are the target.
3. make sure the breathers actually breathe. I have seen some that look good, but the actual vent path is rather small.
4. be certain that the oil isn't 5W20 break in oil
5. I would use 10-30 or 10 -40 depending on what you are using for oil and clearances


Thanks guys

Other concerns are the HI FLOW pump with Hyd lifters.

Dawned on me as I was puzzling replaced with the cam change but still the same pump?

TJM
Old 05-31-2011, 04:03 PM
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cv67
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HV pump with hyd lifters wont hurt anything.
Get it warm and do a compression/leakdown test before panicking.
Dont see how it could be flawless on a dyno then smoke like a chimney??
Check the simple things first.
Old 05-31-2011, 04:33 PM
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383vett
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As mentioned by Coupeguy, double check the oil level. If it is ok, sounds like your engine is shot. So are your motor mounts.
Old 05-31-2011, 09:43 PM
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oldalaskaman
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is it possible you have the thru bolt sitting on top of the motor mount instead of thru it, that would give you bout 3/4" difference, still wouldnt cause those oil issues though
Old 06-01-2011, 09:43 PM
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zarifian383
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Make sure cam is lined up, if its off a couple teeth you might get this problem.

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