D4D turbo headache

[red keith]

own high mileage 2003 rav 4 spent lots on and wll looked after.........recently replaced turbo alas 3 months later gone AGAIN...warranty say oil problem...carbon on rear bearing indicates oil prob...? have good oil pressure regular oil change....hesitant now....anyone been here...? oil pump change poss to be sure....? can this be done without removing engine...?.......or is it matter of replacing oil pipes.....??? any suggestions appreciated.....................???

[fordulike]

2 hours ago, red keith said:

have good oil pressure

Have you actually tested and got good oil pressure to the turbo, or are you going by the fact that your oil pressure light isn't lit?

Not trying to sound condescending, just need to know if you're a hands on kinda guy, or usually leave this stuff to a garage.

The coking on the bearing does suggest a lack of oil flow to the turbo, causing an overheating problem. But on the other hand, if the turbo cooling system isn't working as it should either, then this would cause the turbo to overheat too. Then the oil will coke up.

 

[red keith]

turbo company,s words are carbon deposits on rear bearing / running hot due to oil problems ok cheers sounds like when re-fitted check oil pressure.......any knowledge experience changing oil pump...? can this be done with engine in situ............?

[fordulike]

I wouldn't go changing out parts like pumps, unless you definitely know they are faulty. Check the easy things first, like the hoses that carry the oil to the turbo. They can get gummed up with sludgy oil deposits and restrict the oil flow.

[red keith]

think I,ve got to the bottom of problem thanks .......dropped sump and oil strainer is clogged with carbon build up crud.....new one to fit with new turbo oil feed pipes..........