dave timmons says, the last two weeks, business is up 25-percent... he owns timmonstruck repair in pleasant hill. customers are coming in with dead engines, drained batteries and air conditioners that need repair.dave timmons/timmons auto and truck repair- "a lot of times, they'll have a small leak and then the frion level gets low, so that brings the temperature up -- it doesn't bring it as cool in there, especially when it's 105 degrees and it only cools it to 70 or 80 degrees in the car -- its not good enough for them."ken barsabal/concord auto service- "doing a break inspection. this family is about to go on a road trip." ken barsabal at concord auto service says his mechanics have been working non-stop through the heat wave.nats- tire repair he says customers are rotating in and out of the garage... with many dealing with busted tires.ken barsabal/concord auto service- "if tires are cracking, they'll come apart and that's why you see those big rolls of tires, you know, on the freeway, especially when it's 105, that floor has to be anywhere between 130, 150 degre