Possible head/valve problem

[Downthehaul]

Well hot dog! That’s some good info thanks y’all.

I see what you mean with a dial guage. I got a cheap one but it was useless and got returned. Cummins is going to measure the clearance and let me know.

I would bet they did not cut the block. Reading the receipt from the shop that did the rebuild it sounds like they did the minimum; liners and gaskets, bearings and such. The previous owner was burning through oil and it had carbon packing. I think everything was just cleaned. It’s been running good so far but I know how fast that can change.

If the head is bad, how big of a risk do I run by driving on it? And if I replace it, can they fix the liner issue you’re talking about at the same time? I’m trying to weigh the cost of another inframe vs. replacing the head or potentially blowing the motor.