Valve lapping: A crucial process for the health of your engine Valve lapping is a mechanical operation that is essential for the proper functioning and longevity of your engine. It consists of *rubbing the valve against its seat* in the cylinder head using a fine abrasive paste, in order to obtain a perfectly flat and sealed contact surface. *Why is it important?* *Optimal sealing:* Lapping ensures that the combustion chambers are hermetically sealed, thus preventing gas leaks and optimizing engine compression. This results in better performance, reduced fuel consumption and a reduction in pollutant emissions. *Reduced wear:* An engine with properly lapped valves experiences less wear, which extends its life and delays the onset of mechanical problems. *When should valves be lapped?* The frequency of valve lapping depends on various factors, such as the type of engine, its use and the quality of the engine oil. In general, it is recommended to lap them: *For older engines:* Every 20,000 to 30,000 km *For modern engines:* Between 80,000 and 150,000 km However, it is important to consult your vehicle's maintenance manual for the specific intervals recommended by the manufacturer. *How is valve lapping performed?* Valve lapping is a delicate process that requires specific tools and mechanical skills. It is usually performed by a professional mechanic. Here are the main steps: 1. *Disassembly of the valves and cylinder head* 2. *Careful cleaning of the valves and seats* 3. *Applying lapping compound to the valve seat* 4. *Rubbing the valve against its seat using a lapping tool* using a rotating and reciprocating motion 5. *Careful cleaning of the valves and seats to remove all traces of lapping compound* 6. *Reassembly of the valves and cylinder head* 7. *Adjusting the valve clearance* *Valve lapping: Advantages and disadvantages* *Advantages:* Improved engine performance Reduced fuel consumption Reduced pollutant emissions Extended engine life Quieter engine operation *Disadvantages:* Laborious and time-consuming process Requires specific tools and mechanical skills Can be expensive if performed by a professional mechanic *In conclusion, valve lapping is an operation essential to keep your engine in good condition and optimize its performance. If you have the skills and tools, you can do it yourself. Otherwise, it is important to entrust this task to a qualified professional mechanic.* lapping motorcycle valve lapping valve drill lapping valve without lapping paste titanium valve lapping valve 2cv lapping new valve lapping solex valve lapping valve with drill lapping lawnmower valve lapping valve with drill lapping valve amazon valve after lapping lapping valve by hand lapping valve device pneumatic valve lapping valve lapping in english valve lapping paste valve lapping paste home valve lapping paste green light valve lapping paste amazon valve lapping briggs stratton valve lapping briggs and stratton engine valve lapping bernard engine valve lapping dirt bike valve lapping bernard w110 engine valve lapping pit bike valve lapping chalk valve lapping cox valve lapping cylinder head valve lapping valve on cylinder head valve lapping kit cdiscount engine lapping after valve change valve lapping change valve lapping dirt valve lapping toothpaste valve lapping dax valve lapping diesel engine valve lapping a valve lapping green light valve lapping kit holts lapping valve tiller honda lapping valve jeep willys lapping valve seal lapping kit valve lapping kit norauto valve lapping kit motorcycle lapping kit green light valve lapping kit oscaro valve lapping kit loctite lapping valves lapping engine valve lapping tiller valve lapping norauto valve lapping new valve lapping mandatory valve lapping used valve lapping tool valve lapping tool pneumatic valve lapping tool valve lapping why valve lapping pdf valve lapping price valve lapping renault valve lapping valves lapping car valves lapping 2cv valves lapping drill valve lapping without paste lapping titanium valve lapping tutorial valve lapping tractor valve lapping time valve lapping price valve lapping technique valve lapping lapping a valve lapping car valve lapping screwdriver lapping valve without suction cup suction cup valve lapping video valve lapping suction cup lapping motorcycle valve