Iíd be my paycheck thatís a injector failing. Iím dealing with that now on a big cam cummins. The tapping noise would come and go on mine. You want to address it ASAP, because it can lead to much bigger problems. And if I remember correctly (itís been a while since I messed a a b model cat) those pencil injectors are fairly cheap. Good luck to ya, and Iím curious as to what may of been the problem if you already figured it out.
I was on my way home with it. It gave out on I81 in PA. It started making a deep noise that I thought was a rod knock, but it wasn't. The engine wasn't throwing smoke and it seemed to be holding speed alright. Oil pressure was all the way up. I stopped in the TA in Greencastle and opened the hood. I had a lot of blowby coming out of the breather and the dipstick tube. I called a tow truck. I finally got around to opening the valve cover and lifting the Jake brake.
It's number 3 like I thought. The injector broke through the retainer cap. The exhaust valve to the passenger side is pushed up. The rocker came off the exhaust valves and the pushrod must have fallen into the crankcase.
I'm going to pull the head, but first I need to get my Detroit running. Things don't look good for me right now.
What could drive an exhaust valve up 1/2" higher than all the other valves? The keepers are missing. The only thing there is the valve stem, sticking up all by itself, 1/2" higher than all the others. The other cylinder 3 exhaust valve looks like it's alright.
My Detroit has oil in the coolant, no coolant in the oil. I think it's been doing that for a long time. It's been sitting 4 years. I'm wanting to run it now, but I don't know how serious a problem I have with oil in the coolant. When I'm idling with the pressure cap loose, coolant drips out, then stops for a few minutes, then drips for a few minutes then stops again...