Headgasket piece of piston gone???

[adsm08]

Sorry not much of a gas man but I know on a lot f the diesels the injectors won't fire unless you have a certain battery voltage, do they do anything like this on these? Kinda need help ASAP cuz other truck is down for a while

Nope, gassers aren't anything like a diesel as far as the fuel systems go. 12V in, pulsed ground out.

If you can get it spinning a gas engine will run on a little as 5V.

 

[90longbed]

when I had my 88, I went to change a leaking valve cover gasket..... would not run afterwords...compression test revealed 2 cylinders with no compression.... pulled the head and found the same thing.... what had happened in my case, the engine was only a little over a year old.... 12 mo 12k warranty had it installed by a shop... they had the same warranty... what had happened was the mechanic who was changing stuff to the new engine never had the intake manifold surface checked and it came loose making it run lean and damaged the pistons..( manifold was warped).. ended up rebuilding it myself, drove the truck for 2 years before I sold it.... ran like a top that whole time

 

[4b316]

Did you hone the cyl.good when you put the new piston in?changed the oil?

 

[Road Angels]

Seen that before, since the dot is the front of the engine it must be the exhaust side that went, lean injector, or detonation, or a small hair line crack in the cylinder wall causing a partial ring seizer on the down stroke breaking off the piece, the rings are high on the pistons on 2.5 engines and there weak in that area, also if its high mileage the rings can become sloppy in the ring lands and rock up and down in the ring groove as the piston changes directions, breaking the top of the piston, the valve relief is always where it breaks