Doing PCV mod?! --worth it?
01-08-2002, 11:35 AM
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Re: Doing PCV mod?! --worth it? LS1JM,
I just got back from the Chevy dealer and the parts guy told me that GM is out of stock on part# 12572717 and that GM did not have a scheduled date as to when they would have the part available. He said that usually this means they are improving or changing the part when they don't have a delivery date.
Is there any way you can find out the scoop on a possible new or improved PCV valve part, or is this the ticket? I wonder if an engineer at GM in the LS1 engine department could shed any light on this situation?
Thoughts?
I just got back from the Chevy dealer and the parts guy told me that GM is out of stock on part# 12572717 and that GM did not have a scheduled date as to when they would have the part available. He said that usually this means they are improving or changing the part when they don't have a delivery date.
Is there any way you can find out the scoop on a possible new or improved PCV valve part, or is this the ticket? I wonder if an engineer at GM in the LS1 engine department could shed any light on this situation?
Thoughts?
01-08-2002, 01:14 PM
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Re: Doing PCV mod?! --worth it? Here is a copy of the article/TSB.
It says that this PCV valve/fitting is only for 5.3L or 6.0L engines. Are you sure that this will not cause any kind of harm to the engine or PCV system? I want to try this, but want to make sure that this won't hurt anything.
Higher Than Expected Engine Oil Consumption (Replace PCV Valve) #01-06-01-029
Higher than Expected Engine Oil Consumption (Replace PCV Valve)
1999-2002 Chevrolet and GMC C/K Models
2002 Cadillac Escalade
with 5.3L or 6.0L Engine (VINs T, N, U - RPOs LM7, LQ9, LQ4)
Condition
Some customers may comment on higher than expected engine oil consumption. They may further comment on consumption in the range of 2,000 miles (3,200 km) or less per quart (0.946 liter) of oil under normal driving conditions.
Cause
The condition may be due to the PCV Valve flow rate under certain engine operating conditions.
Correction
Verify that the oil consumption is not the result of an oil leak or other engine concern.
Dealer should perform an oil consumption test. The vehicle should have accumulated over 4,000 miles (6,450 km) before establishing the oil consumption rate. Reference Service Bulletin #01-06-01-011, Information on Engine Oil Consumption Guideline, for details.
Remove the PCV Valve and inspect the hose going to the intake manifold for signs of excessive oil being present.
If excessive oil is present in the PCV hose, replace the PCV Valve Type 948C (2) with a new-style fixed orifice PCV Valve Type CV2001-C (1). See Fig. 1 - PCV Valve Identification.
FIGURE Figure 1 -- PCV Valve Identification(c)
(1) New style fixed orifice PCV Valve Type CV2001-C
(2) Spring and plunger style PCV Valve Type 948-C
Important
Do not install the new style fixed orifice PCV Valve on vehicles equipped with the 4.8L V8 Engine (RPO LR4). Use of this orifice on the 4.8L V8 engine may affect engine idle quality and engine RPM control.
Important
The new style fixed orifice PCV Valve contains no moving parts, and does not rattle when shaken.
If the vehicle has an orifice style PCV Valve, investigate other causes for high oil consumption.
Parts Information
Part Number
Description
Qty
12572717
Valve, PCV Type CV2001-C
1
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
J6000
Valve, PCV - Replace
Use Published Labor Time
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do the job properly and safely. If a condition is discribed, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
© Copyright General Motors Corporation. All Rights Reserved.
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It says that this PCV valve/fitting is only for 5.3L or 6.0L engines. Are you sure that this will not cause any kind of harm to the engine or PCV system? I want to try this, but want to make sure that this won't hurt anything.
Higher Than Expected Engine Oil Consumption (Replace PCV Valve) #01-06-01-029
Higher than Expected Engine Oil Consumption (Replace PCV Valve)
1999-2002 Chevrolet and GMC C/K Models
2002 Cadillac Escalade
with 5.3L or 6.0L Engine (VINs T, N, U - RPOs LM7, LQ9, LQ4)
Condition
Some customers may comment on higher than expected engine oil consumption. They may further comment on consumption in the range of 2,000 miles (3,200 km) or less per quart (0.946 liter) of oil under normal driving conditions.
Cause
The condition may be due to the PCV Valve flow rate under certain engine operating conditions.
Correction
Verify that the oil consumption is not the result of an oil leak or other engine concern.
Dealer should perform an oil consumption test. The vehicle should have accumulated over 4,000 miles (6,450 km) before establishing the oil consumption rate. Reference Service Bulletin #01-06-01-011, Information on Engine Oil Consumption Guideline, for details.
Remove the PCV Valve and inspect the hose going to the intake manifold for signs of excessive oil being present.
If excessive oil is present in the PCV hose, replace the PCV Valve Type 948C (2) with a new-style fixed orifice PCV Valve Type CV2001-C (1). See Fig. 1 - PCV Valve Identification.
FIGURE Figure 1 -- PCV Valve Identification(c)
(1) New style fixed orifice PCV Valve Type CV2001-C
(2) Spring and plunger style PCV Valve Type 948-C
Important
Do not install the new style fixed orifice PCV Valve on vehicles equipped with the 4.8L V8 Engine (RPO LR4). Use of this orifice on the 4.8L V8 engine may affect engine idle quality and engine RPM control.
Important
The new style fixed orifice PCV Valve contains no moving parts, and does not rattle when shaken.
If the vehicle has an orifice style PCV Valve, investigate other causes for high oil consumption.
Parts Information
Part Number
Description
Qty
12572717
Valve, PCV Type CV2001-C
1
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
J6000
Valve, PCV - Replace
Use Published Labor Time
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do the job properly and safely. If a condition is discribed, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
© Copyright General Motors Corporation. All Rights Reserved.
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01-08-2002, 09:12 PM
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Re: Doing PCV mod?! --worth it? TTT
Anyone with more information on this PVC Filter that is only for the truck engines...you'd think there would be a good reason for GM to state this...? right? Any other experts?
[quote]Originally posted by LS1JM:
<strong>I would say a month and a half. 1000+miles....</strong><hr></blockquote>
Anyone with more information on this PVC Filter that is only for the truck engines...you'd think there would be a good reason for GM to state this...? right? Any other experts?
[quote]Originally posted by LS1JM:
<strong>I would say a month and a half. 1000+miles....</strong><hr></blockquote>
01-09-2002, 12:38 AM
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Re: Doing PCV mod?! --worth it? Yes, the fitting is a direct fit for the stock valve. GM has no stock on them now which I posted before. I don't think there is a new design comming since the part# now just came out. Joe.. <img src="graemlins/camaro.gif" border="0" alt="[Chevrolet]" />
01-09-2002, 12:42 AM
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Re: Doing PCV mod?! --worth it? Check the 2 threads below
They give info on the new PCV vale as well as what it looks like
http://www.geocities.com/crackeregg/...06-01-023.html
http://www.geocities.com/crackeregg/...06-01-029.html
They give info on the new PCV vale as well as what it looks like
http://www.geocities.com/crackeregg/...06-01-023.html
http://www.geocities.com/crackeregg/...06-01-029.html
01-09-2002, 12:49 AM
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Re: Doing PCV mod?! --worth it? Guys its funny... As soon as I posted this new info and the part# all the stock GM had vanished in about a weeks time. I had 2 in stock at my dealership 1 for me and 1 to sell. I have 0 now. I will keep you guys posted as soon as stock becomes available. Later, Joe..
<img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" />
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01-09-2002, 11:20 AM
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Re: Doing PCV mod?! --worth it? I just bought the new PCV fitting. I'll post later after I have had time to see if it has reduced or eliminated oil cosumption.
<img src="graemlins/camaro.gif" border="0" alt="[Chevrolet]" />
<img src="graemlins/camaro.gif" border="0" alt="[Chevrolet]" />
01-09-2002, 01:06 PM
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Re: Doing PCV mod?! --worth it? Anybody else out there with experience on the new pcv valve?...bueller...?
[quote]Originally posted by thefritz1:
<strong>TTT
Anyone with more information on this PVC Filter that is only for the truck engines...you'd think there would be a good reason for GM to state this...? right? Any other experts?
</strong><hr></blockquote>
[quote]Originally posted by thefritz1:
<strong>TTT
Anyone with more information on this PVC Filter that is only for the truck engines...you'd think there would be a good reason for GM to state this...? right? Any other experts?
</strong><hr></blockquote>
01-10-2002, 06:52 AM
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Re: Doing PCV mod?! --worth it? LS1JM,
I noticed that there is another PCV valve on the drivers side valve cover in the back. It has a 90 degree elbow on top. Should this one also be replaced, or is the only one that should be replaced the one near the throttle body?
I noticed that there is another PCV valve on the drivers side valve cover in the back. It has a 90 degree elbow on top. Should this one also be replaced, or is the only one that should be replaced the one near the throttle body?
01-10-2002, 07:12 PM
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Re: Doing PCV mod?! --worth it? Please be sure to keep us in the loop regarding the PCV valve I will put it on my car in the spring if you have no problems with it.
[quote]Originally posted by LS1JM:
<strong>There is only 1 PCV valve. Joe.. <img src="graemlins/camaro.gif" border="0" alt="[Chevrolet]" /> </strong><hr></blockquote>
[quote]Originally posted by LS1JM:
<strong>There is only 1 PCV valve. Joe.. <img src="graemlins/camaro.gif" border="0" alt="[Chevrolet]" /> </strong><hr></blockquote>
01-12-2002, 10:40 PM
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Re: Doing PCV mod?! --worth it? [quote]Originally posted by LS1JM:
<strong>The new valve fixed my car. My car uses no oil now.</strong><hr></blockquote>
Does it really use NO oil? How much was it using before? Have you cleaned the TB blade and verified that it stays clean? How much does the new valve restrict PCV flow? If you pop the fresh air tube off the TB and stick your finger on it, how much suction do you feel?
It seems like a hollow valve with a smaller orifice would do what my system does...just restrict flow to keep from sucking so much oil. I'm thinking that just like my system, some oil will get through the new valve, and a filter or two downstream might still be needed to catch that last little bit.
<strong>The new valve fixed my car. My car uses no oil now.</strong><hr></blockquote>
Does it really use NO oil? How much was it using before? Have you cleaned the TB blade and verified that it stays clean? How much does the new valve restrict PCV flow? If you pop the fresh air tube off the TB and stick your finger on it, how much suction do you feel?
It seems like a hollow valve with a smaller orifice would do what my system does...just restrict flow to keep from sucking so much oil. I'm thinking that just like my system, some oil will get through the new valve, and a filter or two downstream might still be needed to catch that last little bit.
01-13-2002, 05:15 PM
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Re: Doing PCV mod?! --worth it? I was getting less than a 1,000 miles to a quart.
I had very little oil in the lines and in the throttle body and manifold. The new fitting just cuts down on the flow. Joe..
<img src="graemlins/camaro.gif" border="0" alt="[Chevrolet]" />
[ January 13, 2002: Message edited by: LS1JM ]</p>
I had very little oil in the lines and in the throttle body and manifold. The new fitting just cuts down on the flow. Joe..
<img src="graemlins/camaro.gif" border="0" alt="[Chevrolet]" />
[ January 13, 2002: Message edited by: LS1JM ]</p>
