Don Terrill’s Speed-Talk

agreed.
If a magnet sticks consider it carbon steel. I do that often and never ran into an oddball that defied the rule.
Although, some are weakly magnetic, not sure what those are, something like 21-2n perhaps.

Ah yes, The "witches brew" would kill the end lifters just the same as the middles..........probably not that. Ok, another possibility. The area around the head bolts creeps down due to torque/time/heat ect, and this distorts the lifter bore, tilting them. Head bolt IS close to lifter bore...

it looks like the lifter area would become an oil pool, no drainback? You'd think that would be a good thing but then again maybe not. How good is the ventilation system on these? It might be cooking a witches brew in there and better to let it drain out. The guy that flogs it all the time has no pr...

Possibly the .050 off center hole....means he was using an indicator to center and that .050 was one revolution of the dial?

Why not press fit the cup? -because it's all borrowed hydro lifter parts -because you can't clean out the inside -because if it was rough machined then heat treated the inside hole is not round enough to press fit, so it requires more operations to make a true press fit, which if eliminated can save...

jesus, forgive me Ok, I thought of one. I was.....supervising a friend and his brother, doing top end on L6 a jeep. I was tired, after work just helping out. The whole time the guys were fighting/insulting each other, which was distracting. It kept overheating. WHy? I could not figure it out. Few da...

Toyota 3.slow heads, rebuilt, have heat tabs on them, no shop name or number. One valve guide cracked, another the top broke off valve guide but they put a valve seal on it anyway, for decoration?. All valves have .002-.003 runout. Two valves have .010 runout, one burned from that. The heads were be...

IMO the reason most engines have a basic and simple cooling system is just because it's less likely to fail and easier to deal with. I'm sure everybody has at one point or another cursed BMW and other oddballs for their systems weird cooling systems. how to get the air out? beats me. If aluminum was...

If it acts like a hydro lifter, maybe it is one. did you take a clip off and look inside them?

I thought he was talking about solid lifters? In which case .040" might be fine idea. All the clip is there really to do in some cases, is retain the pushrod cut for assembly and in event of kaboom, should not ever do anything besides go along for the ride during normal operation. It could be r...

If you trust the cam bearing was right, then measure the ID, if the ID is good then the block bore must be the right size.

There was a fellow or two in austrailia converting older cars to reverse cooling maybe five years ago. I remember reading about it, might have been here, did you use the search?

Sure is hard to speculate. It could be the studs are the strongest link in the chain for all I know. The good news is none of this is invisible or intangible. If you look for it, measure for it, you will see what is going on. Is the head warped? are the washers sunk? are the studs stretched? did the...

Educated guess, .002-.004 average, Less I think maybe ok but you should glue them in if marginal. Most cam bores are not a fine finish, they are just bored, and, roughly. The amount of friction varies with the surface finish. Fords are usually the worst. A quick buff with scocchbrite.....which does ...

To be fair the properties of the head itself would matter too. Since the yield strength of aluminum plummets at 300f+, overheating will cause sunk washers rather than than broken bolts most of the time.....but it could happen. If he uses HUGE washers and assembles it at the north pole I think we cou...