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With Coasting I presume the sound is coming from the engine yes?
If that is the case then the engine may be out of timing.
this is easily adjusted but i would still only recommend having this fixed by a qualified mechanic.
more details on the timing:
Every engine is carefully timed.
the knocking may be created by the piston hitting the closing or opening inlet/outlet valves on the way back up.
this can cause severe damage to the engine as the valves could potentially bore through the piston resulting in possible damage to the piston walls as it slowly starts grinding its way through the engine walls.
you may want to have this seen to.
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∙ 12y ago
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