On the same vein, I bought studs from a vary reputable vendor who resells
Moss (some of the packages had moss p/n). I broke one head stud (at 35 ft
lbs) and actually pulled the threads off 3 manifold studs at 20 ft/lbs!!!!
If you get those pretty copper coloured manifold studs from Moss, I wouldn't
use them. I buying all new from ARP as soon as I can afford it. I believe
the head stud may have be a fluke. I studied it after failure and it
appears that the threads were damaged were the nut stopped, causing me to
twist it off, and all the rest torqued down properly. However, the manifold
studs are not good quality at all.
First time I've ever had problems from Moss, and they may not be aware of
the problem. I plan on calling them and giving them a heads up Friday.
Yes, I have a good calibrated torque wrench, and yes, the studs were
properly lubricated.
Bill
-----Original Message-----
Today I assembled an engine with lots of new parts including camshaft
and tappets. When I adjusted the valves, three of the pushrods seemed
"short". The adjusting screws of those three had to be screwed in much
further than the rest of them. After hours of searching for the cause, I
found that the new tappetts from Moss, part #838-250, varied in the
depth of the bore in which the pushrod sets. Five of them had a "foot
thickness" of 1/4" -- but three of them were only 1/16" thick at the
bottom!!!!! A sure path to failure and lots of mischief inside the
engine.
If anyone has purchased these recently, better check them!
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