...down and he refuses to fix it? i took me truck back the day after next due to it making a real loud knocking noise, he decided to tell me that the engine was going out and wanted to charge me more, i had already paid him a $1,000 dollars why do i need to pay more if he was the last too touch it, i had a 2nd opinion and the 2nd mechanic said the 1st guy screwed it up bad that they didnt clean it with the right stuff, and now there is metal shavings in the oil....what can i do??