Just noticed this on my head after starting to put I new seals. I can polish and make sure there are no burs, but seems pretty shitty to me. Does the valve compress further than the pinch marks?

Kingpin | Madman Developments https://share.google/x4K36IsHabrDBp0l4 In my opinion the lack of inputs will likely make its negligibly better than the spring and star wheel but what do I know. I'd at least like to see rpm in and maybe a gear input

So I was tuning my ve pump Forgot to tighten jam nut on the smoke screw well no more smoke screw does anybody know what size bolt and thread the smoke screw is

1993 D350 5.9l would anyone have any idea what is going on with my truck. Have a look at the video. At idle its hammering, when I increase rpm it goes away. Its very loud at idle. It started doing this last weekend.

Instead of buying a bypass for the back of the block could you plumb into the head on the driver side just above cylinder 6 where the temperature sensor is and add the temperature sensor in with a T then over to the heater core and back down to coolant inlet????