So I am going to use a set of M/T aluminum fined valve covers on a 318. All of the plug holes are knocked out- One is for the twist in fill cap and one is for a breather. The breather hole is like 1.5” i.d. I believe. Has any one successfully installed a PVC in the breather hole? I am assuming somebody makes a grommet for that purpose. I was told a newer Jeep has a PVC with the grommet for that sized hole already. Not sure. I have plenty of grommets for the breather but nothing that fits a pcv. Thanks! Joe
I have used these and took the blank and punched a hole in it to fit the PCV Mopar Performance Valve Cover Grommets P5007419
On a side note pay some attention to how flat the cover rails on your heads are. Sometimes with flat cast covers on stock heads don't like to seal very well due to the rails on the heads being humped up higher in the center. I second the Autozone suggestion for a grommet, and I have also gotten them from Summit going by the measurements of the opening in the cover.
Thank you - already tried that route. The larger breather grommet fits but the smaller pcv does not... too small. Also those are made for sheet metal thickness and not the almost 1/8” cast aluminum flange.
One of the other options I thought about last night was making a conversion part that pops into the larger grommet and the pcv sits in almost like the 66 Commando 273 has on the valve cover. - Looks like a small breather but is actually a pcv assembly. Making it out of an old breather is the start I guess. I was hoping with this thread that somebody out there had used a set of these valve covers and could show me what they did to make them work- besides welding in a piece of aluminum and starting fresh which may be my only option. Joe
I have 2 sets and I used a Mr. Gasket Gromet package , actually I used 2 grommet packages to make one . I'm thinkin' the PVC hole is 1.240" but I'm confused about which hole I'm thinkin' about . Having a senior moment . But the grommet package will let you install the PVC . Do I make sense ?
Apparently the grommets for the Holley M/T valve covers are not currently manufactured. Someone might have old stock. Holley valve covers, grommets? PCV grommet | Moparts Question and Answer | Moparts Forums
