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When riding along im getting a very annoying rattle sounds like the timing chains have gone but ill assure you now my engine is perfectly healthy ,

anyways when i hit the radiator on the N/S by the temp sensor the noise is coming from inside the radiator !

but cant see what would have got in there any advise ?

cant see the rad touching anything either ,

For anyone interested . Feeling embarrassed now I thought it was the rad it turned out my header nuts had come loose causing my exhaust to vibrate , strange but fixed