XLR8NSS

iTrader: (4)

Does anyone have a copy of the TSB's out for the oil consumption in the 2500HD 8100 Silverados?

Did the TSB mention anything about intake gasket replacement or PCV replacement?

Was there ever a recall for this issue with some of the 8100's?

A guy I know with a 8100 has had quite a bit of oil consumption with his and of course the dealer says it's normal so he'd like to try and find a TSB or recall on it to take in.

Thanks

chevymec

iTrader: (19)

Subject: Excessive Oil Consumption - keywords bolt gasket head intake #PIP3193B - (07/14/2005)



Models: 2002-2005 Chevrolet Avalanche

2001-2005 Chevrolet Silverado, Suburban

2003-2005 Chevrolet Kodiak

2001-2005 GMC Sierra, Yukon XL

2003-2005 GMC TopKick

Equipped with 8.1 engine




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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
Higher than expected oil consumption even after the intake bolts were replaced per Bulletin 02-06-01-035.

Recommendation/Instructions:
Since this type of engine may be used under various load conditions, the acceptable rate of oil consumption is 1 quart (.946L) of oil every 100 gallons (379L) of gasoline. If the intake bolts were replaced per 02-06-01-035 and the excessive oil consumption still exists, replace the intake gaskets with part number 89017539. Use current SI instructions for intake gasket replacement and torque procedures.

Mid year 2004 changes to the cylinder head and intake gaskets were made, making a more robust seal between the cylinder head and the intake manifold. Early 2004 8.1L engines will accept the updated gaskets discussed in this PI, 89017539. The late 2004 8.1L engines that have the updated head and intake gaskets do not require a updated gasket. The differences in the engine are as follows.

2001 to 2004 1/2 8.1L L18 engines will accept the gasket Part Number 89017539.

These engines can be identified by inspecting the intake bolts or the intake gasket.

• The intake manifold bolts will be silver in color and measure 65mm long.


• The intake gasket will be flat with no type of locator that engage to the cylinder head


2004 1/2 to current 8.1L L18 engines will not accept gasket Part Number 89017539.

These engines can also be identified by inspecting the intake bolts or the intake gasket

• The intake manifold bolts are black in color and measure 72mm long.


• The intake gaskets are stamped seal with locating Dowels that fit into the counter bored bolt holes in the cylinder head for the intake bolts.


• Due to the more robust intake seal be sure to complete normal oil consumption testing. If oil consumption is excessive (more then 1 quart (.946L) of oil every 100 gallons (379L) of gasoline), complete SI diagnostics for oil consumption


• If a intake gasket is found to be leaking, use the most current parts catalog listings.


Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

XLR8NSS

iTrader: (4)

Thanks man. He has a 2002 so maybe he can get them to change the gaskets out and see if that helps.

02_2500avalanche

When will gm learn, there junk box of a pcv the designed flat out sucks literaly. At the bottom of the intake manifold lies about a 5/16" pipe sticking out of the manifold about 1", this is what gm calls there "fixed orifice pcv" well what it does is use engine vacuum to suck in crank case gases that are floating around the lifter gallery. The problem is that there is no valve it just sucks whatever it pleases. So you can see the problem....hmmmm oil consumption? When I pulled my heads off I plugged that hole in the intake and drillled to holes in the front of the valve covers, ran -10 lines with remote breathers under the throttle body. I know not the ideal pcv system by todays emmisions standards but guess what it works. Now my truck has 105k on it and doesnt use a drop of oil and I drive it like a race car. Thats my two cents.

Alex

moes04silverado

iTrader: (2)

good write up my friend....you got a pics of this mod/improvement. I know mine consumes like not other

Neil 6.0

Just a little more of what has already been said...

http://www.thedieselpageforums.com/t...ad.php?t=21143

02_2500avalanche

I have to take some pics of my set up, but I forgot to take pics of the plug I made for it. I might have some pics we can use to discuss this...I gotta go looking for them. Honestly any one could do this mod themselves, the hardest part is getting the egr off the back of the manifold...ahaha i did away with egr anyway so i had it easy. I would probly guess that this would take bout a half day with someone taking their time, of coarse I already had the heads off the truck so it was no big deal. Let me see if I can find some pics and figuire out how to post them.

Alex