Has anybody running W5's had trouble with valve seals before? We've went from teflon to vitons and still have issues. Has anyone tried to plumb drain lines from the back of the heads to the pan? The seals are submerged in oil all the time. I've not restricted the oil to the rockers either and i'm wondering if that would help matters any, thanks, jesse

If you haven't cut drain slots in the spring pockets you will need them to help drain the oil. cut a notch about .125 on the push rod side of the spring pocket. Sorry I dont have any pictures.Try doing a W-5 search.

We cut drain slots in the spring wells in our W5s and ran oil drain lines to the pan , dont know what those guys were thinking about when they cast the heads

You can't blame the guy doing the casting,it's not his design.

That's true, good point , It was them dam rocket science guys

The GOOD W-5 heads came unmachined and the race
shops installed their own guides, seats, etc.

Does anyone have pictures of theses modifications, i'm not for certain where to put the drains. Also how big does the fittings need to be? I was thinking a 1/8 pipe and a 4an line should work. Thanks for the help, jesse

Here!

2

Thanks guys!

1/8 npt works fine, I put mine toward the back of the heads in front of # 7 & 8 cyls, my engine tilts back more than most car installs for 4 wheel drive