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.
A serpentine belt drives vital engine components such as the water pump, alternator, power-steering pump and air-conditioning compressor. The belt, named serpentine because it winds through the front of the engine in a snake-like manner, replaces the system of multiple belts that was common on older vehicles. RepairPal allows drivers to get an online estimate based on their location and the year, make and model of the car. 2  Purchased separately, a serpentine belt typically costs $10-$75.