Thread were lubricated, also cross checked my torque wrenches (fairly new) last time when I was verifying the tightness of head bolts. The threads were possibly damaged, and the repeated camshaft installations did no good to it. Felt it by hand, should have paid more attention.I'm really guessing here, and you are far more advanced than I am, but I'd do a couple of things before your next torque session: oil threads (unless of course thread-lock is called for) and check your torque wrench or gauge with another one.
I have had an old torque wrench go WAY out of spec and cause some problems before.
That's for sureD A M N ..... you really don't have a streak of luck......
I feel the same, probability of success is low. Will try on the old head first. I've ordered a combined drill and tap, hoping that the remainders of the threads will center the tool at the tapping section. Also will keep the cap installed (bolted on one side only) to keep things even more square.Uneviable
task. Can you construct a jig to hold your hand tools. using whatever fixing points you can secure ? This would enable you to manage depth of your drill too; you'll need good swarf management as well..
Even the simple task of tapping a a thread can go t1t s up without precautions....!
A bit more, manual calls for 20Nm which is around 15 ftlbs.What a cocker. What torque did you use? I can’t imagine it’s more than 10 ftlbs.
Unfortunately couldn't find any available nearby.Go and hire a magnetic stand drill, then bolt a piece of 1/2” steel to the head and attached the drill stand to that.
It's conventional / mineral oilI think Mobile Super 1000 is a synthetic, I would use a mineral but other than that, that’s how I usually run stuff in but mine are usually pushrod motors.
Right, shouldn't lug it anyhowVary the revs (no motorways) and don’t lug the engine.
This was my original choice too, but then decided on Millers CRO as it's specifically a break-in oil. But found a lot of posts about people using VR1 because of the high zinc content. Which as I understand is more important for cam break-in.