by Retro Pedro on Tue Jun 02, 2015 9:44 pm
What year you looking at Brian?
I ran a 2.9 TDi 2001 MkI for a number of years. Pulled like a train with mid 20 fuel return running about. Alot higher on a run.
The MkI do have a reputation of the cylinder head going porous and the sills rotting out. Mine ran fine when we first got it in 2006 but in the later years I did have over heating problems. No coolant leaks visiable so it must have been evaporating somewhere. That said, it didn't lose any power or run rough, just white smoke. Top the coolant up and it was fine until the next time. Have a look under the bonnet above the coolant expansion tank for signs of it boiling up. You'll see scald marks on the underside of bonnet. The over heating problem used to blamed on the rear heater pipe work. There is a flow and return pipes that run underneath of the vehicle to the back heater. These branch off from the main heater pipes under the bonnet. Roughly abvoe the rear wheels, part of this piping is metal in the area near the exhaust. Apparently the metal pipes would corrode and leak and the coolant lose wouldn't be noticed until it boiled up. Chances that could lead to cracks in the cylinder head. Also IIRC the front drive shafts would also need checking.
Beleive the MkII (51-54ish) with the straight lined grill had fuel pump failure reputation. Mind you, with the costs involved for a new pump, one with a failure would have been in the scrappers years ago.
The MkIII with the diagonal small squared grill were supposed to have been sorted.
Not sure about the MkIV latest shape apart from sliding door issues with the higher spec versions.
Your right about the cam belt. On the TDi (early MkI) it's a twin cam and fuel pump that have to stay aligned. As is always recommended, the tensioners/belt kit are not the cheapest. Again, recommended, water pump should really come into the equation. On the later CRDi engines, being common rail, it may not need to have the fuel pump locked.
As with any big MPV, there is alot of glass area, air con is recommended but it will need the associated maintenance.
Another mis conception is that the 2.9 diesel engines is Mercedes. What I used to get told is that only a few really early motors had the true Mercedes lumps, some had Mercedes components, i.e. cylinder head on Kia blocks etc. Wasn't long before all the engines were made in Korea based on the Mercedes design. So metal quality comes under the radar.
EDIT
Just remembered, the automatic versions just tip over the road tax band. The manuals aren't cheap to tax, but the autos are mega bucks. That did change with the latest models when they went for the 2 litre engines as opposed to the 2.9.
I know your looking at the 2.9 diesel, but don't be tempted on the 2.5 petrol engines The petrol engine was Rover and the resale values were very low compared to the 2.9.
All that said, I loved mine. Comfortable cabin seats with the high driving position.