Truck had an injector problem had it scanned by a shop, then changed the two bad injectors personally, truck ran great, 1500 kms later i took it to a different shop to do head studs and gaskets after job was done they told me there was a compression issue but not to worry too much because of no power loss and to bring it back in a few hundred kms, truck smoked and idled terribly so I took it back they said they would change a few injectors to fix it but it only got worse I went back and all they said it needs a new engine didn't even look at it, engine ended up having a broken ring and a block so scored it needs a new one,(different shop found problem) is it possible the shop could have done the damage on installation of gaskets/studs? If there was a compression problem prior to gasket install shouldn't they have seen it with the heads off or I should have noticed while driving it?