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98-->99+ Valve Cover Question

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Old May 25, 2005 | 02:59 PM
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Default 98-->99+ Valve Cover Question
Do I need to do something to the pvc system? Thanks.
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Old May 25, 2005 | 07:16 PM
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I'd swap over to a 99+ setup at the same time.
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Old May 25, 2005 | 07:24 PM
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I should have said pcv. Should I do the valley cover?
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Old May 25, 2005 | 07:28 PM
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I've have great luck on my car with nothing more than stock 01 setup and AMW catch can. Don't see a need for a LS6 valley cover with that.
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Old May 26, 2005 | 04:09 AM
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Sounds good!
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Old May 28, 2005 | 04:17 PM
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What do I need to buy to change over? I would buy a catch can if it would help over the valley cover. I am adding a NW 90mm TB and Fast intake also, but the tb has the pcv hookup if I am not mistaken...
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Old May 30, 2005 | 04:55 PM
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From the pictures I've seen, all the 99 up pcv stuff should work with the NW TB.
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Old May 30, 2005 | 05:05 PM
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Yes...I have the NW 90mm TB and it does have the provision for the PCV hookup.
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Old May 31, 2005 | 03:47 AM
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Cool...thanks guys!
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Old May 31, 2005 | 04:17 AM
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the complete hose with PCV valve is gm part number 12573108
also needed is the grommet for the driver side valvecover, # 10198949
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Old May 31, 2005 | 04:28 AM
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Do those parts replace any of the existing numbers above, or are they needed in additional to the original 4 parts?
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Old May 31, 2005 | 04:31 AM
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From Lawman SS (I need all the parts for the 99+ system as I am changing to 99+ valve covers from 98's):

If you're still running 98 v/c, I don't know how compatible the 99+ grommets/hoses are with the holes/fittings on the 98 covers. Attached is a pic of the 99+ system...you should need parts 222, 241, 273, and 280.

Here are GM numbers that I have:
222 - 12562580
241 - incl w/222
273 - 10198949
280 - 12556454
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Old May 31, 2005 | 02:22 PM
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Anyone got an answer for this--which one is it?
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Old Jun 1, 2005 | 03:45 AM
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Last time...
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Old Jun 1, 2005 | 09:22 PM
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Anyone--need to place an order!
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