2002 td4 auto freelander turbo problems

[Freddy Freelander]

Conrod bearing failed at 164kms, motor reconditioned. Now problems with turbo boost pressure, turbo control solenoid replaced, little better, but still not reacting to gear selection, i.e. not changing until accelerator is pressed down very hard or in cruise when a change down is required i.e. set at 80kph, drops to 60kph before change. Boost adjusted, running well for 2 weeks then when a bit more speed is required, pedal pressure increased, no response, then pedal to the floor, 3-4 seconds later, it takes off. It is now saying that the turbo hose is being blocked and collapsing. Possible turbo (spinning) failure, costly repair or replacement? Any ideas or advice. Thanks

 

[Dorsetfreelander]

You haven't told us which engine (TD4 or TDi) or age or manual/auto etc I guess it's a diesel auto with a turbo problem . Conrod bearing (big end?) failure is unusual (especially at 160k kms)  if car has had oil changed regularly. If not then poor oil could affect the turbo life.    What other damage was caused when the conrod bearing failed - piston hit valves perhaps?     If the intake pipes are collapsing there could be a blockage in the intercooler but you basically need to get the air intake circuit from air cleaner to turbo apart and checked for oil sludge.  

Fundamentally, when the cost of repairs gets to this level on an old car there is only one sensible way out.

[Dorsetfreelander]

Sorry I just read your thread title which says it's a 2002 TD4 auto. 

[Glenlivet]

My TD4 is behaving in a similar way. I reckon it's the MAF sensor giving up. Just haven't had time to change it yet. 

Edited March 6, 2017 by Glenlivet

[Dorsetfreelander]

Surely the critical clue here is the collapsing intake pipe (if that is what is happening), what evidence have you got suggesting the MAF sensor?

[Glenlivet]

12 hours ago, Dorsetfreelander said:

Surely the critical clue here is the collapsing intake pipe (if that is what is happening), what evidence have you got suggesting the MAF sensor?

In my case the intermittent slow/very slow throttle response. The turbo hose was replaced after it split, also all the vacuum pipes have been replaced along with the turbo solenoid (all connected to a different, now cured, problem). Mine's done 120k miles and goes well when responding to throttle. 

[Freddy Freelander]

Just picked up car, air Turbo hoses collapsing when revs increased. Found intake hose to have a balloon inside from the inner membrane, badly restricting air to turbo. Prognosis was it must have had a small hole in membrane which, due to high pressure, forced gas in between, causing the balloon to form over a period of time till it caused too much of a restriction. It was still up when he showed it to me. All relevant hoses replaced as they were soft. Regarding big end bearing failure old hand, no prognosis.  I have had the vehicle since 60ks, serviced as per book (LR dealer).  History of burst turbo hose,  all hoses replaced, fuel pump failure, creep solenoid and thermostat replaced. I might point out that replacing a thermostat on a BMW td4, was quoted as being a 7hr job due to left hand drive engine in right hand drive car, so I was led to believe. (I was fortunate my mechanic had done it before, and had the special tools to do it in 3.5 hrs.).   Other than brakes, batteries and Cooper tyres replaced at 148 Ks, nothing unusual.  Running well now, hope this may help others. See photos below.