Have you taken the egr valve off, as that could be stuck. Guessing you have

No egr on it, early 300tdi, I will have a browse through the posts trax sent a link to, but as for turbo or hoses if they were a problem surely I wouldn't get just over 1bar at the manifold would I ? or am I missing something ? all hoses appear good and the elbow is a new silicone one, tappets were done late last year,

Thanks again barney
 
Sounds like it's not getting enough air. Airflow and pressure are different things really.
Air filter, clogged intercooler, collapsing / internally delaminating air hoses, poorly plumbed snorkel etc.
Any play / roughness in the turbo bearings? Damage to the turbo vanes?
 
Sounds like it's not getting enough air. Airflow and pressure are different things really.
Air filter, clogged intercooler, collapsing / internally delaminating air hoses, poorly plumbed snorkel etc.
Any play / roughness in the turbo bearings? Damage to the turbo vanes?

Yes there is definatly play in the turbo bearings, I noticed this when I first bought it and did the manifold gasket, no end float but quite a bit of play in the bearings that was over 5 years ago and with 17,000 less miles on it, I thought because it was boosting ok then no need to bother, am I wrong with this thought ?
Thanks barney
 
Yes there is definatly play in the turbo bearings, I noticed this when I first bought it and did the manifold gasket, no end float but quite a bit of play in the bearings that was over 5 years ago and with 17,000 less miles on it, I thought because it was boosting ok then no need to bother, am I wrong with this thought ?
Thanks barney

Just a thought try removing the fan if yours is still on and see what happens could be the fan has a barrier between the rad and engine or fan and engine i have my fan off as i find at high speeds the fan restrict's it :)
 
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Just a thought try removing the fan if yours is still on and see what happens could be the fan has a barrier between the rad and engine or fan and engine i have my fan off as I find at high speeds the fan restrict's it :)

My fan is still on, never thought about the fan, viscous coupling still works ok though, I might give it a try but don,t want to run with it off all the time as I do a lot of ticking over over farm and barely moving over farm fields,

Thanks again
 
My fan is still on, never thought about the fan, viscous coupling still works ok though, I might give it a try but don,t want to run with it off all the time as I do a lot of ticking over over farm and barely moving over farm fields,

Thanks again

Yeah it could be a faulty fan if it is you can either fix / replace the fan or fit an electric fan but i would give it a go and see :)
 
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Yes there is definatly play in the turbo bearings, I noticed this when I first bought it and did the manifold gasket, no end float but quite a bit of play in the bearings that was over 5 years ago and with 17,000 less miles on it, I thought because it was boosting ok then no need to bother, am I wrong with this thought ?
Thanks barney

Slight side to side play is normal as the turbo shaft normally 'floats' in oil when running to reduce friction. When you check it engine off the oil has drained away so you can feel the clearances. No end-float is the important bit
 
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