Valley cover O rings
Thread Starter
10 Second Club
Joined: Nov 2005
Posts: 933
Likes: 75
I have a Magnuson TVS and the valley plate does not have the vacuum port like the stock one. Since the holes in the block that match up with the O rings go to the lifter bores, (not all), I was trying to figure out the function?
Staging Lane
Joined: Jan 2015
Posts: 66
Likes: 0
From: NC
Sense I misspoke I feel obligated to help lol. I searched and found this:
"You noticed when you pulled the valley cover there are 'towers', and they are probably drilled. These lead to the lifters. Further machining would have allowed the block for use as an AFM engine, most blocks, whether used for AFM or not, recieved at a minimum, the towers during casting and the holes drilled during the machining process, regardless of it's intended use. Of course, the vette doesn't use AFM but the towers and holes are still there, the "O" rings seal the posts against an internal oil leak, doubt it, leave the O rings out and watch your oil pressure.
You cab tap and plug the towers if you'd like"
"You noticed when you pulled the valley cover there are 'towers', and they are probably drilled. These lead to the lifters. Further machining would have allowed the block for use as an AFM engine, most blocks, whether used for AFM or not, recieved at a minimum, the towers during casting and the holes drilled during the machining process, regardless of it's intended use. Of course, the vette doesn't use AFM but the towers and holes are still there, the "O" rings seal the posts against an internal oil leak, doubt it, leave the O rings out and watch your oil pressure.
You cab tap and plug the towers if you'd like"
