Reply to previous post on GM Pcv valve to aid in blowby

[BetMinesFaster]

Hey guys, It was recently suggested that I replace my PCV valve with a Gm part to aid in blowby, This post is just to make the part number known, for future reference!

Gm PCV Valve: CV893C (25095468) $6.08
Gm Pcv Grommet: 1381487 $8.04

 

[unix_punk]

IMO you should check that valve by blowing through it in the direction of boost (ie, into the top side where the vac line goes) because the part they show (dont remember it offhand) for the gn allows boost to leak through back into the crankcase... You will most likely need a check valve on top of the pcv to prevent this...Kirban sells one but it is not very good and sticks (dont mean to knock a great vendor) and IMO is definetly NOT worth 25$... I got mine and tested it a bit and its worthless. Maybe I just got a bad one. But I decided to spend a bit more on a quality peice from Kepner that I knew will work perfectly. Again, Kirban is a great vendor, but the check valve he sells for the PCV valve is of questionable quality for the price.

 

[2 QK 4 U]

Hey guys, It was recently suggested that I replace my PCV valve with a Gm part to aid in blowby, This post is just to make the part number known, for future reference!

Gm PCV Valve: CV893C (25095468) $6.08
Gm Pcv Grommet: 1381487 $8.04

So did this fix your problem?

 

[gyrhead]

Pricing

Hey guys, It was recently suggested that I replace my PCV valve with a Gm part to aid in blowby, This post is just to make the part number known, for future reference!

Gm PCV Valve: CV893C (25095468) $6.08
Gm Pcv Grommet: 1381487 $8.04

Those are the right numbers, but those are pretty much full retail prices. You can do a lot better on these parts and other GN parts with us or most any of the sponsoring vendors on this board.

NEVER pay dealer list - they are RIPPING us off big time!

Tom

 

[BetMinesFaster]

Not quite sure yet!

So did this fix your problem?

Im waiting for my TA headers to show up so I can finish the reassembly, However, The valve I removed easily passed air both directions, so I am going to make an early asumption that this will correct the problem.......

 

[TurboDave]

A new 893 will allow a small amount of air to pass in the "boost" direction (which in my case has never been enough to cause a problem), and should allow a fairly free flow in the vacuum direction.

 

[unix_punk]

I agree, my main concern was that I am running a crankcase evac setup which requires the VCs to be plugged, so I could not have any boost entering and thus negating any vacuum that the pump was trying to create in the crankcase.