Removing knock out in valve covers

[keith88]

Hi everyone i just bought a set of mopar performance valve covers for my charger anyone have an idea on removing the knock outs little concerned about cracking the cover when doing so. I also have another question i  bought the grommets that go it it and i was told the the PVC grommet goes in the oil cap hole is this true.

[PlainfieldCharger]

I thought those needed to be drilled out as they are cast aluminum

[Sublime/Sixpack]

It's been years since I did a set of those, but it seems that I used a drill first then a die grinder with a bit in it for aluminum.

[70 sublime]

It's been years since I did a set of those, but it seems that I used a drill first then a die grinder with a bit in it for aluminum.

I went this route also about 6 months ago

Just go slow and keep checking the fit

[terrible one]

Am I the only one that took a huge punch and small sledge to theirs?  Turned cover upside down, smacked the plug out, then cleaned up the rough edges with a file. Mine were M/T's so maybe the MP covers are different.

[XH29N0G]

I didn't punch them out.  I just used the PVC grommet on one side (it went into the spot where the valve cover caps go).  I had to drill the plug out using a wood spade bit to make it the right size for the PVC valve I had. I used a breather that was threaded to fit in where the valve caps go on the other side.  I suggest you mock up before knocking out.  If you want to know out, or drill out, go ahead.  I have been told you need different gromets for that.

[69wannabe]

The last one's I put on for a customer I actually found a grommet that fit the twist in cap hole and the mopar pcv valve fit it nicely and I just used a twist in style oil cap with a breather for the other side. I can't remember what the number for the grommet was but I found in the the help section at my local o'reillys. Did you valve covers come with the baffle's and screw's??? Them are also necessary if they didn't come with them you will need to get them. I did these valve covers this way so I didn't have to drill them. I will look tomorrow and see if I have that grommet number hanging on the wall in my shop. I have a bad habit about saving part numbers and sticking them on the wall for future reference!!!

[fy469rtse]

Big socket underneath to support area that you don't want to damage , hammer and  punch , job done ,
Clean up edge

[69wannabe]

The grommet number that fits where the oil caps screw into the valve cover is a 42054 in the help section. Like I said the other side I just used a breather style oil cap that twist in so I didn't have to knock out or drill the valve covers and just used the holes that were already there. The grommet number above is good to use to fit your pcv valve into. Seal's off very nicely.

[XH29N0G]

This is what I did, but used p5249642 which for the PVC valve I had required a little drilling to enlarge.  I will look for the 42054 next time.

[keith88]

Ended up doing the Drill and burring bit thing it worked great for me.

[XH29N0G]

Looks great.

[Sublime/Sixpack]

Good to hear it worked out for you, and the covers look great.

[PlainfieldCharger]

Looks great...hole saw and press used on mine

[Yatzee]

These are not really "knock out" so the hole is generally made using a hole saw and a drill press after finding exact center.

[chargd72]

These are not really "knock out" so the hole is generally made using a hole saw and a drill press after finding exact center.

Found that out the hard way.  I used the knock out method but all it really does is collapse the hole.  It works if you clean it up enough with the dremmel but it would have been much easier just to drill it out.

[PlainfieldCharger]

I guess we could call them drill outs...I knew knocking or punching them out was not the option...