Beware of White Post Restorations

[Dave K.]

Re: Beware of White Post Restorations

White post rebuilt and resleeved my 66 standard master cylinder about 7 or 8 years ago and it has worked fine since.

Dave K.

[John D.]

Re: Beware of White Post Restorations

If that is the type of plug used in some of the early distributors, like the 905's and 906's in their cross shaft seal, they lock in place by putting a slight dimple in the center of the plug once it's seated in the bore it's designed to seal. Putting a slight dimple in the center changes the outside diameter and locks it in. You could try straightening the plug back to it's original shape and putting it in the bore then re-staking it in place. I just looked at the plug in the end of my 022 cylinder and it looks like that process is used to secure it. Although instead of a punch in the center it looks like a ring shaped object was used to dimple it.

THe idea is to spread the welsh plug (also called freeze plug) so it seats and stays put. I was taught years ago that you must use a punch almost the diameter of the plug so you stretch it or seat it in the bore. Just putting a dent or ding in the center doesn't cut it. On the fuel injections there is a welsh plug on the side of the fuel bowl. Same idea as the master cylinder. The plug is the size of a nickel. I use a large flat punch to set the welsh plug big time. I also use an epoxy called PC -7 that Eastwood sells. I put the epoxy on the side on the bore. Lay the new plug in. Set it with a big punch. Wipe off the excess and I have never had one fall out. The same idea could easily be done to the master cylinder.
Go to a nice local Carquest as they have a welsh plug assortment of various sizes. Welsh plugs available in industrial tool places like Traver, McMaster Carr, MSC, etc. They are very cheap. JD

[Mike G.]

Re: Beware of White Post Restorations

thats why i only use lonestar. he could probably replace the plug for you or at least tell you where to find the plug. he has done several for me with no problems