2001 8.1 Burning Oil

[8100 Power]

Hey guys, my 8.1 is buring 3 qrt.s of oil between changes, after a good 30 min trip, you can smell it, oh yeah, intake manifold bolts and manifold itself has done been replace 9,000 miles ago......

[496 CUBIC INCHES]

What kind of oil are you running?

[Haulin' 8.1]

If you smell it there's a leak. Look for it.

 

Valve covers, oil filter adapter, front or rear crank seals, etc. Mine leaks a little from the front seal.

 

Vernon

[miket]

Hey guys, my 8.1 is buring 3 qrt.s of oil between changes, after a good 30 min trip, you can smell it, oh yeah, intake manifold bolts and manifold itself has done been replace 9,000 miles ago......

 

<{POST_SNAPBACK}>

 

 

 

 

My 01 8.1 goes through 3 qrts between oil changes---always have since new. No leaks. The dealer says it's normal.

[Daubs]

Hey guys, my 8.1 is buring 3 qrt.s of oil between changes, after a good 30 min trip, you can smell it, oh yeah, intake manifold bolts and manifold itself has done been replace 9,000 miles ago......

 

<{POST_SNAPBACK}>

 

 

 

 

My 01 8.1 goes through 3 qrts between oil changes---always have since new. No leaks. The dealer says it's normal.

 

<{POST_SNAPBACK}>

 

 

 

 

Yea, my buddy who is a service manager at GM dealership says the 8.1's do burn some oil. He recommends I check often. I go through about 2 Qt's between oil changes. I change oil every 5k, even if engine monitor says I'm good to go...

[tmf6902]

Man I am lucky to burn 1 qt in 5000 miles. Isn't there a fix for this? I read something on here about a new something to keep the 8.1 from burning oil.

[miket]

Man I am lucky to burn 1 qt in 5000 miles.  Isn't there a fix for this?  I read something on here about a new something to keep the 8.1 from burning oil.

 

<{POST_SNAPBACK}>

 

 

 

 

New ring pack---change pistons too so you don't have that nice Diesel-like rap at startup.

[8100 Power]

What kind of oil are you running?

 

<{POST_SNAPBACK}>

 

 

 

The last 2 oil changes its been Castrol GTX 10W-30

 

i tried 5w-30 before that, no diffrence...

 

What i dont understand is when your burning oil out the exaust pipe, you should lose alot of power, i havent, ive got alot of power! Just dont understand..........

[tmf6902]

Man I am lucky to burn 1 qt in 5000 miles.  Isn't there a fix for this?  I read something on here about a new something to keep the 8.1 from burning oil.

 

<{POST_SNAPBACK}>

 

 

 

 

New ring pack---change pistons too so you don't have that nice Diesel-like rap at startup.

 

<{POST_SNAPBACK}>

 

 

 

 

 

Nope I have a very small amount of piston slap at startup....could be the real deal....could be a cold engine starting for the first time of the day. Reguardless it goes away after about a min of running. So I'm not really concerned about it.

 

The fix I was thinking about was the upgraded PCV valve.

 

TMF

[Daubs]

tmf6902: How many miles on your 8.1?

 

I've just turned 10k on mine and don't hear any piston slap *knocks on wood*

[Bud]

tmf6902:  How many miles on your 8.1?

 

I've just turned 10k on mine and don't hear any piston slap *knocks on wood*

 

<{POST_SNAPBACK}>

 

 

 

 

My 8.1 has almost 12K with no slap. It

does use a qt. between changes more

if I'm towing.

[8100 Power]

The fix I was thinking about was the upgraded PCV valve.

 

I went thru that on mine, their is no pcv valve on an 8.1, at least thats what 3 dealers told me, i can't find it either.....

[mitchntx]

I switched to M1 5W40 SUV blend and my consumption has seemed to lessen over the last 4K miles

 

This is not a scientific observation, I just don't seem to have to add oil as often

[tmf6902]

tmf6902:  How many miles on your 8.1?

 

I've just turned 10k on mine and don't hear any piston slap *knocks on wood*

 

<{POST_SNAPBACK}>

 

 

 

 

I'm creeping up on 48K

[Haulin' 8.1]

The fix I was thinking about was the upgraded PCV valve.

 

I went thru that on mine, their is no pcv valve on an 8.1, at least thats what 3 dealers told me, i can't find it either.....

 

<{POST_SNAPBACK}>

 

 

 

 

I just got the Helms 2001 CK5 service manual 5 volume set for Christmas, obviously, this is coolness. I'm learning all kinds of good stuff scanning through them.

 

Here's what it has to say about the PCV system on the 8.1:

"Crankcase Ventilation System Description

 

The crankcase ventilation system has no serviceable components so routine maintenance of the system is not required.

 

A closed crankcase ventilation system is used in order to provide a more complete scavenging of crankcase vapors. The air cleaner supplies the fresh air through a filter to the crankcase. The crankcase mixes the fresh air blow-by gasses. This mixture then passes through a pipe/passage located in the intake manifold."

 

Don't get to hung up on the part about the air cleaner supplying fresh air through a filter to the crankcase, there isn't a separate filter for the PCV system, that is refering to the engine air filter inside the air cleaner box.

 

I must be lucky, my 2001 8.1 @ 55K dosen't burn excessive oil or have any piston noise at start up.

 

Vernon