{"type":"doc","content":[{"type":"paragraph","content":[{"text":"Abstract","type":"text","marks":[{"type":"strong"}]},{"text":": Ticking or Rattling noise from Engine during cold start or short trip","type":"text"}]},{"type":"rule"},{"type":"paragraph","content":[{"text":"Applies to: BMW 3 Series 2006-2009(E90, E91, E92, and E93 with the N51, N52 or N52K engines)","type":"text"}]},{"type":"rule"},{"type":"bodiedExtension","attrs":{"extensionType":"com.atlassian.confluence.macro.core","extensionKey":"section","parameters":{"macroParams":{},"macroMetadata":{"schemaVersion":{"value":"1"},"title":"Section"}}},"content":[{"type":"extension","attrs":{"extensionType":"com.atlassian.confluence.migration","extensionKey":"legacy-content","text":"","parameters":{"reason":"A column macro in a rich body macro can't be created or edited in the new editor.","nestedContent":{"type":"doc","content":[{"type":"bodiedExtension","attrs":{"extensionType":"com.atlassian.confluence.macro.core","extensionKey":"column","parameters":{"macroParams":{"width":{"value":"65%"}},"macroMetadata":{"schemaVersion":{"value":"1"},"title":"Column"}}},"content":[{"type":"panel","attrs":{"panelType":"info"},"content":[{"type":"paragraph","content":[{"text":"Let me know how it works for you. Comment below on changes that would improve the article, whether it works for you, etc. - Nick","type":"text"}]}]},{"type":"paragraph","content":[{"text":"An occasional ticking or rattling noise from the intermittent hydraulic valve adjuster (HVA) elements may occur during cold engine starts or frequent short-distance driving. In these situations, the HVA elements may not yet have been supplied with sufficient amounts of air-free oil. This condition will not cause any","type":"text"},{"type":"hardBreak"},{"text":" damage to the engine, and usually remedies itself with a longer driving distance or operating times at full operating temperature.","type":"text"}]},{"type":"paragraph","content":[{"text":"HVA bleeding procedure:","type":"text"}]},{"type":"panel","attrs":{"panelType":"info"},"content":[{"type":"paragraph","content":[{"text":"The bleed time may take anywhere from between two minutes and (in rare cases) to a maximum of 30 minutes. This procedure is to be performed","type":"text"},{"type":"hardBreak"},{"text":" on a level surface with the vehicle stationary, and in a properly ventilated area.","type":"text"}]}]},{"type":"paragraph","content":[{"text":"Before performing HVA bleeding procedure chack that:","type":"text"},{"type":"hardBreak"},{"text":" *Engine oil level is correct","type":"text"},{"type":"hardBreak"},{"text":" *Engine is at operating temperature","type":"text"}]},{"type":"paragraph","content":[{"text":"-Bring the engine up to an operating speed (no load) of 2000-3000 rpm and maintain this condition for three 1. minutes (bleeding procedure).","type":"text"},{"type":"hardBreak"},{"text":" Let the engine idle for 15-30 seconds and reevaluate whether the noise is still present or not.","type":"text"}]},{"type":"paragraph","content":[{"text":"-Engine quiet - procedure is finished.","type":"text"}]},{"type":"paragraph","content":[{"text":"-Engine noise is still present - repeat the procedure; perform steps #1 3. and #2 up to a maximum of 5 times.","type":"text"}]},{"type":"paragraph","content":[{"text":"-Only if the noise remains after performing the bleeding procedure 5 times: proceed by performing the procedure for a final time, also at an","type":"text"},{"type":"hardBreak"},{"text":" engine operating speed of 2000-3000 rpm, but for a total time duration of 15 minutes.","type":"text"}]},{"type":"paragraph","content":[{"text":"If bleeding procedure is unsuccessful or ticking noise returns shortly after HVA bleeding procedure cylinder head replacement may be necessary.","type":"text"}]}]}],"version":1},"cxhtml":"65%

Let me know how it works for you. Comment below on changes that would improve the article, whether it works for you, etc. - Nick

An occasional ticking or rattling noise from the intermittent hydraulic valve adjuster (HVA) elements may occur during cold engine starts or frequent short-distance driving. In these situations, the HVA elements may not yet have been supplied with sufficient amounts of air-free oil. This condition will not cause any
damage to the engine, and usually remedies itself with a longer driving distance or operating times at full operating temperature.

HVA bleeding procedure:

The bleed time may take anywhere from between two minutes and (in rare cases) to a maximum of 30 minutes. This procedure is to be performed
on a level surface with the vehicle stationary, and in a properly ventilated area.

Before performing HVA bleeding procedure chack that:
*Engine oil level is correct
*Engine is at operating temperature

-Bring the engine up to an operating speed (no load) of 2000-3000 rpm and maintain this condition for three 1. minutes (bleeding procedure).
Let the engine idle for 15-30 seconds and reevaluate whether the noise is still present or not.

-Engine quiet - procedure is finished.

-Engine noise is still present - repeat the procedure; perform steps #1 3. and #2 up to a maximum of 5 times.

-Only if the noise remains after performing the bleeding procedure 5 times: proceed by performing the procedure for a final time, also at an
engine operating speed of 2000-3000 rpm, but for a total time duration of 15 minutes.

If bleeding procedure is unsuccessful or ticking noise returns shortly after HVA bleeding procedure cylinder head replacement may be necessary.

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Before Performing any Work

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