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I purchased this tool when replacing the head gasket for a 2000 VW Jetta 2.0 GL 5 speed. (MK4) I also replaced the cylinder head. Without this tool, it would have been impossible to complete this task properly. It is used for the tasks/repairs below; ⁃ When changing the timing belt or reinstalling it after a head gasket or cylinder head or camshaft change, you need or ensure that the camshaft sprocket mark is aligned with the mark on the rear timing belt cover so that crankshaft is set to Top Dead Center (TDC) on #1 cylinder. Failure to do this will mean that the engine valves and pistons will not be in sync and this might lead to rough engine movements or even the destroying of valves or engine failure. You want to get this right and get it right the first time. There is no room for error. ⁃ During a new cylinder head installation where you want to retain the original camshaft sprocket. To do so, you have to take out the camshaft sprocket bolt, remove the camshaft sprocket from the old cylinder head and reinstall the camshaft sprocket onto the new cylinder head. ⁃ If camshaft sprocket is damaged or needs to be removed for reasons other than the ones listed above. ⁃ crankshaft drivebelt pulley loosening the crankshaft drive sprocket retaining bolts and crankshaft pulley ⁃ If replacing the crankshaft front oil seal or housing you need to remove the drive sprocket, or if the sprocket and/or bolt is worn itself. The bolt is locked on tightly and only this tool can lock the sprocket into place as the sprocket bolt is removed. This tool is pricey but it is the only way to tighten the camshaft and crankshaft sprocket bolts respectively and hold the camshaft sprockets and crankshaft sprockets still when working on the car.Read full review
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