Wood vinegar is a byproduct from charcoal production. It is a liquid generated from the gas and combustion of fresh wood burning in airless condition. When the gas is cooled, it condenses into liquid.Raw wood vinegar has more than 200 chemicals, such as acetic acid, formaldehyde, ethyl-valerate, methanol, tar, etc.ood vinegar is safe to living matters in the food chain, especially, insects that help pollinate plants. Wood vinegar is made from burning fresh wood in a charcoal kiln, made from a 200-liter oil drum and 120-cm-tall concrete chimney with a 4-inch diameter. The kiln contains 63-83 kg of fresh wood.
The average cost for an Audi A4 Serpentine Belt Replacement is between $80 and $144. Labor costs are estimated between $61 and $78 while parts are priced between $19 and $66. Estimate does not include taxes and fees.
Additional costs: 1  If a serpentine belt breaks, certain systems in the car may shut down, so experts recommend that a belt be replaced early, especially if it shows signs of cracking or wear. 2  Replacing a serpentine belt can be done either by a skilled do-it-yourselfer or a professional repair technician. This includes $25-$75 for the belt plus half an hour to an hour of labor, at $75-$120 per hour. 2  The job could even take longer on some vehicles, if the belt is difficult to access or install quickly.