Corolla Van 1.4 D4d

[freewheel]

my turbo whistles loudly from only 1050rpm. i bought it with 66k on clock and its been doing it since. now 102k on clockbut van running perfect. i had another van before and didnt whistle so loud. its no major problem but just wonder why. asked people and they said turbo seems ok, no major oil burning. could the turbo have been adjusted previously or is this possible ?

[maddatta]

A whistling turbo is a good indication of it's not far off packing in. It will be down to either the bearings going or a break in the turbo itself (higher pitch whistling). The turbo's I work with make quite a bit of nice whilst pulling load and we know from our records that they are due replacement. Have you been following the rules of turbo driving? i.e. let the engine run for a few mins on start up before you boost, and let it idle for a few minutes before switching off as the majority of turbo's are oil cooled and when your engine is off you will not be circulating oil, this in turn will burn up on the bearings and cause them to seize over time. See how it goes but it might be worthwhile getting it changed before it ruptures and sprays oil everywhere. The only other thing is to check around your turbo for any leaks on the boost side as this will cause whistling too.

Dan

[freewheel]

Thanks for that Dan, I was hoping the turbo may have been adjusted to kick in at lower revs. Obviously not so, guess im lucky it didnt pack in sooner. Maybe my regular oil changes saved it about every 7K. Better look out for a new or reconditioned turbo. A turbo must have a short life or is it that it may have been abused previously i.e. no warm up or cool down.

A whistling turbo is a good indication of it's not far off packing in. It will be down to either the bearings going or a break in the turbo itself (higher pitch whistling). The turbo's I work with make quite a bit of nice whilst pulling load and we know from our records that they are due replacement. Have you been following the rules of turbo driving? i.e. let the engine run for a few mins on start up before you boost, and let it idle for a few minutes before switching off as the majority of turbo's are oil cooled and when your engine is off you will not be circulating oil, this in turn will burn up on the bearings and cause them to seize over time. See how it goes but it might be worthwhile getting it changed before it ruptures and sprays oil everywhere. The only other thing is to check around your turbo for any leaks on the boost side as this will cause whistling too.

Dan

[maddatta]

Thanks for that Dan, I was hoping the turbo may have been adjusted to kick in at lower revs. Obviously not so, guess im lucky it didnt pack in sooner. Maybe my regular oil changes saved it about every 7K. Better look out for a new or reconditioned turbo. A turbo must have a short life or is it that it may have been abused previously i.e. no warm up or cool down.

A turbo is just like any other part on the engine, if properly looked after it will run for a long time. The biggest cause of turbo failure is seizure through heat on the bearings due to insufficient cooling of the oil. I'm not to up on turbos on road diesels, I imagine they would run on low boost just to give you that extra bit of compression for your ignition and moreso to not really affect driveability i.e. most people want to get straight in their cars and drive off and when they park up they like to jump straight out. The turbo's on the engines I work on run at about 36psi and they do get very hot so proper warmups and cool downs are a must. Before you rush out and panic I would first just take a look around the turbo and check for any leaks, not too sure of they layout of the D4D engine but I'm sure you will be able to get at it to have a look/feel. Just check that there aren't any leaks, if there aren't any then the whistling you are hearing are bearings skipping.

Dan

[freewheel]

good man Dan yoy know your stuff. thats a great help thanks, il follow your advice

Thanks for that Dan, I was hoping the turbo may have been adjusted to kick in at lower revs. Obviously not so, guess im lucky it didnt pack in sooner. Maybe my regular oil changes saved it about every 7K. Better look out for a new or reconditioned turbo. A turbo must have a short life or is it that it may have been abused previously i.e. no warm up or cool down.

A turbo is just like any other part on the engine, if properly looked after it will run for a long time. The biggest cause of turbo failure is seizure through heat on the bearings due to insufficient cooling of the oil. I'm not to up on turbos on road diesels, I imagine they would run on low boost just to give you that extra bit of compression for your ignition and moreso to not really affect driveability i.e. most people want to get straight in their cars and drive off and when they park up they like to jump straight out. The turbo's on the engines I work on run at about 36psi and they do get very hot so proper warmups and cool downs are a must. Before you rush out and panic I would first just take a look around the turbo and check for any leaks, not too sure of they layout of the D4D engine but I'm sure you will be able to get at it to have a look/feel. Just check that there aren't any leaks, if there aren't any then the whistling you are hearing are bearings skipping.

Dan

[maddatta]

Let me know how you get on with it, don't forget to check all your turbo system for leaks (intercooler etc).