1 Hiring a mechanic to replace a timing chain typically costs $300-$1,000, depending on the make and model of the vehicle, its age and whether the work is performed at a dealership or an independent shop.2  Purchased separately, a timing chain typically costs $50-$250 or more. Timing chains are often sold in kits which contain additional smaller parts that can be used in the repair. 2  Prices for kits vary considerably, from $20 to $1,000 ,as replacement parts for some original equipment manufacturers simply cost more to build than for others.
The deepest hole ever drilled by humans (Russians) is the âKola Super deep Boreholeâ, on Kola Peninsula in the North West corner of Russia, located near Finlandâ. Russian scientists had to invent new ways of drilling, due to the depth of that area. A number of bore holes were drilled by branching from a central hole. The bore hole which reached 12,262 meters (40,230 ft) in 1989 is the deepest hole ever drilled, and the deepest artificial point on the earth.
Today, the deepest hole ever created by humankind lies beneath the tower enclosing Kolaâs drill. A number of boreholes split from the central branch, but the deepest is designated âSG-3,â a hole about nine inches wide which snakes over 12.262 kilometers (7.5 miles) into the Earthâs crust.