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Buzzing sound from oil cooler pipes


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Only when hot, and no fluctuation on oil pressure gauge

Could this be a symptom of a sticking pressure relief valve ??

I dont want to experience oil pressure loss ? anyone had this noise before ?

Thanks

Alan

Edited by alanlambert
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Is the buzzing associated with a particular rev band or also present at idle? 

1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

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Hi Mike,

Only hear it when bonnet open and its there when hot at all revs, well from tickover and increases when its revved up.

Initially suspected it was a bearing on the front of the engine first but traced it to the oil cooler pipes with a stethoscope when over a pit.

Thought it might be an issue with oil cooler pipe de laminating inside, but changed them to no avail. ?

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Could it be from the oil pump itself? That would probably transit to the oil lines.

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1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

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  • 2 months later...

I had a similar issue, check out this thread and my solution is toward the end 

 

Paddle Faster, I hear Banjos!
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