After I asked about the temperature range of Permatex Blue, I chastised myself for violating a principle:? Do a search first,then if no satisfying answer is found, ask someone.? Well, I did a search and found that the temperature range application is comparable.? As the kids say: My bad.
I just finished attending to the problem tappet adjuster.? First, I began with No. 1 cylinder and checked the clearance on the two tappets (all OK); checked clearance on No. 3 (all OK); then to No.4 cylinder. One tappet clearance OK the other is the problem tapper adjuster.? I raised the threaded nut to zero lash, cleaned threads by repeated application of lacquer thinner each followed by a blast of compressed air. Finally I cleaned the threads with brake cleaner, followed by compressed air.? After an hour or so to evaporate I applied Blue, set the tappet clearance, then carefully rotated the engine until the tappet was fully engaged with the valve.? This will apply pressure to the tappet/adjusting nut threads for a tighter fit, hopefully resulting in a more secure bond.? I wish I had read your post earlier.? I would have run the adjustment nut up the way you suggest.? Oh well, as my grandkids say, we will see how this works out after 24 hours curing time.? If this doesn't work, then I will try to distort the tappet by squeezing it with a vise grip.
With strong lighting it appeared that someone had set the lash then used a punch to bugger the threads, I suppose hoping that this would solve the problem of a loose adjuster nut.?
Since I've got the fender off I decided to rebuild the Ross steering box next.
Again, thank you for the advice.
