Breathing new life into the 318 in the Scamp!
Yes. They are Hughes lifters. I bought them with the cam, many moons ago and only recently popped the tape on the box, when I put it all together the first time, a few months ago.
I was super careful, put the red cam break-in lube on the faces and green oil on the sides, made sure none of the heavy pressure lube went up the sides. OCD.
The rest of the lifters are free of any kind of flaws. I know when craters happen in metal, from a volcano situation, that spot is far more susceptible to heat failure.
Hughes tells you to check the cam and lifters dry with caster oil on the sides and nothing on the tappets. I did and they all spun according to their test chart with sharpie marks on the tops to check rotation.
My guess, and looking at the side of this lifter, seeing more linear wear in color, trailing the spot above the craters, is that it got comfy once it warmed up from that crater creating a riser spot and didn't want to spin.
I'd believe it was the block if it happened in the same place, twice over, from the old cam eating it, but the lifters that live in those bores now, look fantastic and the other cam's #4 exhaust lobe looks fine, where this one came out of.
I'm wondering if Hughes is going to cover this. I know that flattened cams are usually operator error, but I didn't put the craters in the side. They aren't dings or scratches. They are clearly dark colored reliefs that didn't get machined or contacted with anything, because they would be bright if they were, and is the only explanation that I can figure, as to why this lifter didn't do what the others did.
I wouldn't think something that small could do it, but the bright trail following the spot leads me to believe it got hot.
Yes. They are Hughes lifters. I bought them with the cam, many moons ago and only recently popped the tape on the box, when I put it all together the first time, a few months ago.
I was super careful, put the red cam break-in lube on the faces and green oil on the sides, made sure none of the heavy pressure lube went up the sides. OCD.
The rest of the lifters are free of any kind of flaws. I know when craters happen in metal, from a volcano situation, that spot is far more susceptible to heat failure.
Hughes tells you to check the cam and lifters dry with caster oil on the sides and nothing on the tappets. I did and they all spun according to their test chart with sharpie marks on the tops to check rotation.
My guess, and looking at the side of this lifter, seeing more linear wear in color, trailing the spot above the craters, is that it got comfy once it warmed up from that crater creating a riser spot and didn't want to spin.
I'd believe it was the block if it happened in the same place, twice over, from the old cam eating it, but the lifters that live in those bores now, look fantastic and the other cam's #4 exhaust lobe looks fine, where this one came out of.
I'm wondering if Hughes is going to cover this. I know that flattened cams are usually operator error, but I didn't put the craters in the side. They aren't dings or scratches. They are clearly dark colored reliefs that didn't get machined or contacted with anything, because they would be bright if they were, and is the only explanation that I can figure, as to why this lifter didn't do what the others did.
I wouldn't think something that small could do it, but the bright trail following the spot leads me to believe it got hot.