1 Brands with calcium or aluminum may cause constipation. 2  Rarely, brands with calcium may cause kidney stones or other problems. 3  If you take large amounts of antacids that contain aluminum, you may be at risk for calcium loss, which can lead to weak bones (osteoporosis).
The customer explained that typically small Hurth gears, specifically the ZF / HBW50 to ZF / HBW250 gears in sailboat applications, last about 1000 hours on average. Since the cost of a rebuilding small ZF / Hurth mechanical transmission is roughly $1000, the fellow continued.this indicates that the cost of running a little 20 pound Hurth transmission attached to an auxiliary engine is about $1 per hour.he customer explained that typically small Hurth gears, specifically the ZF / HBW50 to ZF / HBW250 gears in sailboat applications, last about 1000 hours on average. Since the cost of a rebuilding small ZF / Hurth mechanical transmission is roughly $1000, the fellow continued.
The cost for a rebuild will vary depending on the amount of racing hours on the engine. If the engine has limited hours on it and only need rings, bearings and a valve job, the cost will average $1,500-$3,000.00 including parts.GM recommends that the rods, camshaft, lifters and valve springs be replaced after two years or 300 hours of use. typical Factory Stock will expect to see engine costs drop by as much as 1/ 2 as the engine will be competitive for an average of two years. That cost will be further reduced because of the initial cost of the crate engine will be lower.