crazy oil consumption
#1
crazy oil consumption
uses like 1qt. a week and doesnt smoke one bit!!!!!!! could this be a PCV problem??? i took the map sensor out the other day for what reason i dont know, but it was soaked in oil. i know these motors are known for sucking the oil threw the pcv so thats why i was wondering
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All you need is a quality oil catch can set-up for the pvc side of things. That will be the cheapest and best route to take if the problem lies there.
That is very odd. Your not even running a forced induction type set-up and burning that much oil???
You need to do a compression test on each cylinder. That will tell you possibly if you have a ring problem.
Good luck on this.
Jim
That is very odd. Your not even running a forced induction type set-up and burning that much oil???
You need to do a compression test on each cylinder. That will tell you possibly if you have a ring problem.
Good luck on this.
Jim
#6
ok im having a similar problem but ive noticed that every once in awhile ill see blue smoke right when i start the engine and it a pretty good bit but thats not offten tho lose a qt in like a month or two looked at the pcv seems alight im just going to replace and see it that helps any ideas where it getting in to the chamber and i dont smell any thing like burning oil after its started
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Originally Posted by regency
uses like 1qt. a week and doesnt smoke one bit!!!!!!! could this be a PCV problem??? i took the map sensor out the other day for what reason i dont know, but it was soaked in oil. i know these motors are known for sucking the oil threw the pcv so thats why i was wondering
Did you do anything to your LS1 before you installed it??? what did it come out of? The vettes and i think camaros have a bulletin about oil consumption, and it is the rings that are at fault, especialy when being driven hard
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Originally Posted by regency
uses like 1qt. a week and doesnt smoke one bit!!!!!!! could this be a PCV problem??? i took the map sensor out the other day for what reason i dont know, but it was soaked in oil. i know these motors are known for sucking the oil threw the pcv so thats why i was wondering
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Subject: Higher Than Expected Oil Consumption (Replace Rings and Engine Valley Cover) #01-06-01-023A - (06/19/2002)
Models: 1999-2001 Chevrolet Camaro
1999-2002 Chevrolet Corvette
1999-2001 Pontiac Firebird
with 5.7L Engine (VINs G, S -- RPOs LS1, LS6)
--------------------------------------------------------------------------------
This bulletin is being revised to add model years for the Corvette, information on the LS6 engine and parts information. Please discard Corporate Bulletin Number 01-06-01-023 (Section 6 - Engine).
--------------------------------------------------------------------------------
Condition
Some owners may comment on higher than expected oil consumption. When checked, the oil consumption could be in the range of 400-600 miles per quart (700-1000 km/L).
On the LS6 engine only, the technician may find oil behind the engine throttle plate and in the intake manifold.
Cause
The cause for this condition may be an interaction between the piston rings and the cylinder bore in vehicles that are operated at higher RPMs -- typically manual transmission vehicles driven in a manner where the engine is frequently or consistently operating at greater than 3200 RPM.
On the LS6 engine only, the engine has a unique aluminum valley cover that has composite oil separating baffles and PCV plumbing incorporated. In some cases, the PCV baffle may not be properly sealed to the valley cover, causing oil to enter the PCV system.
Correction
On the LS6 engine only, replace the engine valley cover if oil is found behind the throttle body or in the intake manifold before replacing the piston ring. Refer to Engine Valley Cover Replacement in the Engine Mechanical - 5.7L subsection of the Corvette Service Manual.
A new set of piston rings is currently available through GMSPO. The new rings are part of a complete piston ring kit. Install only the number 2 compression ring and the oil expander ring from the piston ring kit. All other rings in the piston ring kit should be discarded. The original number 1 compression ring and the oil ring rails should be re-used in their original positions on the piston. All pistons should be used in the same cylinder bore.
Important: Do not dress or hone the cylinder bore. Nothing should be done to change the bore finish for this condition. Changing the bore finish may aggravate the condition.
Refer to the Unit Repair Manual for appropriate ring removal and replacement procedure.
The number 1 compression ring and the upper and lower oil expander rails are re-used because they are already broken in for the bore that they are in. The new number 2 compression ring is made with a very sharp edge that will break in quickly.
Changing only the piston rings noted, with no change in driving style, should change oil consumption to an acceptable level. Changes in driving style that reduce the amount of time spent at higher RPMs will also positively affect oil consumption.
In addition to the standard size piston ring kit listed below, a 0.25 mm oversized piston ring kit is available. The oversized piston ring kit should only be used in those rare instances where the cylinder bore size has been machined larger to accommodate the 0.25 mm oversized piston rings.
Here is the bulletin, something to think about... Good luck
Subject: Higher Than Expected Oil Consumption (Replace Rings and Engine Valley Cover) #01-06-01-023A - (06/19/2002)
Models: 1999-2001 Chevrolet Camaro
1999-2002 Chevrolet Corvette
1999-2001 Pontiac Firebird
with 5.7L Engine (VINs G, S -- RPOs LS1, LS6)
--------------------------------------------------------------------------------
This bulletin is being revised to add model years for the Corvette, information on the LS6 engine and parts information. Please discard Corporate Bulletin Number 01-06-01-023 (Section 6 - Engine).
--------------------------------------------------------------------------------
Condition
Some owners may comment on higher than expected oil consumption. When checked, the oil consumption could be in the range of 400-600 miles per quart (700-1000 km/L).
On the LS6 engine only, the technician may find oil behind the engine throttle plate and in the intake manifold.
Cause
The cause for this condition may be an interaction between the piston rings and the cylinder bore in vehicles that are operated at higher RPMs -- typically manual transmission vehicles driven in a manner where the engine is frequently or consistently operating at greater than 3200 RPM.
On the LS6 engine only, the engine has a unique aluminum valley cover that has composite oil separating baffles and PCV plumbing incorporated. In some cases, the PCV baffle may not be properly sealed to the valley cover, causing oil to enter the PCV system.
Correction
On the LS6 engine only, replace the engine valley cover if oil is found behind the throttle body or in the intake manifold before replacing the piston ring. Refer to Engine Valley Cover Replacement in the Engine Mechanical - 5.7L subsection of the Corvette Service Manual.
A new set of piston rings is currently available through GMSPO. The new rings are part of a complete piston ring kit. Install only the number 2 compression ring and the oil expander ring from the piston ring kit. All other rings in the piston ring kit should be discarded. The original number 1 compression ring and the oil ring rails should be re-used in their original positions on the piston. All pistons should be used in the same cylinder bore.
Important: Do not dress or hone the cylinder bore. Nothing should be done to change the bore finish for this condition. Changing the bore finish may aggravate the condition.
Refer to the Unit Repair Manual for appropriate ring removal and replacement procedure.
The number 1 compression ring and the upper and lower oil expander rails are re-used because they are already broken in for the bore that they are in. The new number 2 compression ring is made with a very sharp edge that will break in quickly.
Changing only the piston rings noted, with no change in driving style, should change oil consumption to an acceptable level. Changes in driving style that reduce the amount of time spent at higher RPMs will also positively affect oil consumption.
In addition to the standard size piston ring kit listed below, a 0.25 mm oversized piston ring kit is available. The oversized piston ring kit should only be used in those rare instances where the cylinder bore size has been machined larger to accommodate the 0.25 mm oversized piston rings.
Here is the bulletin, something to think about... Good luck
#10
PT's Slowest Truck
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Originally Posted by Southern Dixie Rebel
ok im having a similar problem but ive noticed that every once in awhile ill see blue smoke right when i start the engine and it a pretty good bit but thats not offten tho lose a qt in like a month or two looked at the pcv seems alight im just going to replace and see it that helps any ideas where it getting in to the chamber and i dont smell any thing like burning oil after its started