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tapping noise from top of vauxhall engine?

ive got a astra 1.6 and got a tapping noise at top. ive done a engine flush and oil change a few weeks ago now got tapping noise. I check engine level its ok. does noise appear due to lack of oil pressure due to only doing short journeys or does doing short journeys not cause the noise. I understand u need oil pressure to circulate oil to oil cam but I don't know how to get rid of noise.

mark walwyn
May 2013
If this is an 8 valve the camshafts were bad for wearing due to lack of oil changes and gave out a chapping noise from the top end,there are tools required for this and enables the removal and fitment of the camshaft and followers without removing the head.

cdc
May 2013
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