What Causes the Engine Noise in BMW R1200GS?

2 Answers
Carvalho
07/25/25 10:23am
BMW R1200GS engine noise is caused by wear on the cam rocker arms. Excessive clearance between piston and cylinder wall: Over-tight assembly of piston pins or connecting rod bearings; excessive clearance between tappets and their guide holes; wear on camshaft lobes; sometimes, loose starter clutch causing pulley noise (more noticeable during RPM changes). Excessive valve clearance: Too much clearance between tappets and their guide holes; worn camshaft lobes; excessive clearance between valve stems and guides; broken valve springs; radial cracks in camshaft timing gears; loose valve seats; stuck valves failing to close. Excessive piston-to-cylinder clearance: Incorrect depth and width of main bearing oil grooves; low oil pressure leading to poor lubrication.
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Leo
08/11/25 7:41pm
I have a BMW R1200GS, and the engine has made noise several times. The most common issue is the valve clearance becoming too large, causing those small valves to open and close inaccurately, making the engine sound very noisy. Belt wear or looseness can also easily cause noise; a belt that has been used for a long time and becomes deformed will squeak. Oil problems are another point—too little oil or dirty oil leads to poor lubrication, increasing mechanical friction noise. Aging spark plugs causing uneven combustion can also result in crackling sounds. Regular maintenance is essential; I often check the belt tension and valves and change the oil periodically. If ignored, bearings or chains might fail, leading to higher repair costs. Generally, for simple issues, check the valves and belt first; for more complex problems, take it to a professional shop—safety first.
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