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squeeling noise at high revs

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hi all iv got a 200tdi 90 with a squeal that sounds like a bearing at high revs when under load .I changed the cambelt last year the turbo feels good but it has a whistle iv changed the water pump and fitted an alternator . has anybody got any ideas what to look at next

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Have you replaced the belts ?

Mo

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On the 300Tdi the tensioner pulley is well known to squeal when it's on it's way out! 

I am NO Land Rover expert so no idea if a 200 has one? If does look at the centre if it's showing black/brown dust around it, this indicates the bearings have seized iirc?

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yes I changed all the belts and sprayed them with belt dressing but still no good 

 

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It could be a spit hose - turbo to intercooler or on to the inlet manifold. I had one and it was only obvious once the pipe was off the vehicle and only when squeezed.

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Take the belt off and run the engine briefly to see if the noise goes to rule out the belt, PAS pump, water pump and alternator. 

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Are your belt pulley grooves shiny and polished ? May be worth matting them with some wet and dry if they are to reduce the possibility of slip.

Mo

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the turbo whistles even if the pipes off and both props were new last year and have been greased monthly .the pulleys are shiny though what you recommend to dull them are you talking about scratching with sand paper or using very fine sand paper.

 

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Our Td5 made a squealing noise at high revs when its outlet manifold was warped. That particular squeal was'caused by the metal plates of the manifold gasket vibrating. I know it's a different engine, but maybe it's worth checking if all connections with gaskets are tight.

A warped manifold is a typical Td5 issue, and could be recognised by traces of soot where the block joins the manifold. Two nuts could be turned by hand.

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Just try some fine wet and dry to matt the shine off.

Mo

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I washed the landy this weekend and while washing it I noticed the rear exhaust rubber was broke .im now thinking  it could be the exhaust pipe rubbing against something so iv ordered some new rubbers . fingers crossed

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I had a high pitched squeal on my 200 which turned out to be a failed hose clamp and a hose had come off the turbo partially. 

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