98-->99+ Valve Cover Question

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05-25-2005, 02:59 PM

BoneSS

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98-->99+ Valve Cover Question

Do I need to do something to the pvc system? Thanks.

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05-25-2005, 07:16 PM

WILWAXU

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I'd swap over to a 99+ setup at the same time.

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05-25-2005, 07:24 PM

BoneSS

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I should have said pcv. Should I do the valley cover?

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05-25-2005, 07:28 PM

WILWAXU

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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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05-26-2005, 04:09 AM

BoneSS

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Sounds good!

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05-28-2005, 04:17 PM

BoneSS

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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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05-30-2005, 04:55 PM

WILWAXU

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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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05-30-2005, 05:05 PM

LawmanSS

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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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05-31-2005, 03:47 AM

BoneSS

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Cool...thanks guys!

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05-31-2005, 04:17 AM

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onyxxtreme

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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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05-31-2005, 04:28 AM

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BoneSS

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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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05-31-2005, 04:31 AM

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BoneSS

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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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