CR 2.0 reliability/passat and golf??

[Mike McKinstry]

Hi,
Do the 2.0 CR engine suffer with injector issues as the 2.0PD.
Also someone has advised me that the 2.0 sportline golf with a CR engine will be more reilable
than any 1.9TDI golf and potentially the passat?s there any truth in this?
Presumably the golf 2.0CR also has DPF-are these known to give bother-Mrs not got heavy right foot?

Or is best option still 1.9 105-just shame about the EPB which the golf wouldnt have.

Any thoughts would be much appreciated.
Mike

[DMitch16]

Hi Mike, the injector issues with the 2.0PD were as a result of a fault with their manufacturing (after VW changed from Bosch to Siemens). The early batch of Siemens Piezo injectors had an inherent fault which was subsequently rectified by a recall program to replace them. There should be far fewer problems with the later PD injector versions or those vehicles where the injectors have already been replaced.

Common rail does have it's own set of problems as the higher pressures of the CR system and higher fuel temperatures can affect the wear on other components such as the fuel pump, injectors, piston and liners. It is generally a more efficient, quieter system however.

There are three factors that place significant additional stress on the CR system, compared to earlier diesel injection systems:

1. The increased operating pressure causes higher loadings on equipment, which places a bigger demand on the fuel’s lubricating ability, than is required with earlier injection systems.
2. The higher pressure also increases fuel temperatures. As a consequence, fuel degrades to form deposits. Such deposits interfere with the fine tolerances, to cause sticking, malfunction and injector wear. This risk increases if using biodiesel blends, since biodiesel by nature, degrades faster.
3. Diesel sulphur levels have been reduced, to reduce smoke emissions. However, sulphur provides lubrication, so lowering sulphur levels results in greater wear to very expensive fuel pumps and injectors .

Common Rail Diesel Additive provides strongly enhanced fuel lubricity, and superior deposit control for fuel pumps and injectors. While it’s recommended as a routine preventative step for CRD engines, it has been shown to eliminate severe injector rattle. It is suitable for all diesel engines.

It's a matter of choice, but you'll always get a load of good cars and the odd bad one in the same model. No brand has a perfect record or we'd all have the same cars! Lol

I have a PD with the injectors replaced under recall many thousands of miles ago and have not had any problems (before or after the replacement). An acquaintence of mine had the injectors fail at 80mph and coasted to a halt on the hard shoulder! No problems since replacement, again many thousands of miles ago.

[Teflon]

I've not spotted a single CR reliability issue raised on this forum since it came out in 2008. That's not to say there are none, but put beside the injectors, oil pump and other issues they are doing well so far. I can't confess to looking a lot at the Mk 6 Golf threads, so maybe there's a problem or two there.

I believe all the CRs have DPF. It was certainly the case when it first went in the Passat. Yes there have been some issues, but not a mountain of complaints here. Some of the threads start "I've had my car re-mapped and ...........". Mine's done 25k in over 4 years and the Passat is my "steady" drive. No DPF problems.

[martin1810]

Common rail does have it's own set of problems as the higher pressures of the CR system and higher fuel temperatures can affect the wear on other components such as the fuel pump, injectors, piston and liners. It is generally a more efficient, quieter system however.

There are three factors that place significant additional stress on the CR system, compared to earlier diesel injection systems:

1. The increased operating pressure causes higher loadings on equipment, which places a bigger demand on the fuel’s lubricating ability, than is required with earlier injection systems.
2. The higher pressure also increases fuel temperatures. As a consequence, fuel degrades to form deposits. Such deposits interfere with the fine tolerances, to cause sticking, malfunction and injector wear. This risk increases if using biodiesel blends, since biodiesel by nature, degrades faster.
3. Diesel sulphur levels have been reduced, to reduce smoke emissions. However, sulphur provides lubrication, so lowering sulphur levels results in greater wear to very expensive fuel pumps and injectors .

Common Rail Diesel Additive provides strongly enhanced fuel lubricity, and superior deposit control for fuel pumps and injectors. While it’s recommended as a routine preventative step for CRD engines, it has been shown to eliminate severe injector rattle. It is suitable for all diesel engines.

Sorry. But the above information looks like cut and paste from an advertisement and is nonsense presumably intended to sell a product. Peugeot/Citroen have been using this system for years and it is excellent.

[rapport25]

Sorry. But the above information looks like cut and paste from an advertisement and is nonsense presumably intended to sell a product. Peugeot/Citroen have been using this system for years and it is excellent.

Martin is right. My previous car was a Peugeot 406 hdi. Vw are so far behind with diesel technology. Mine was a 1999 V plate common rail diesel. Covered around 180k whenI got rid. Ok the Vw feels rapid. But I miss the refinement of the common rail diesel.

[turpal]

Martin is right. My previous car was a Peugeot 406 hdi. Vw are so far behind with diesel technology. Mine was a 1999 V plate common rail diesel. Covered around 180k whenI got rid. Ok the Vw feels rapid. But I miss the refinement of the common rail diesel.

Common rails are good but pd`s have proven themselves reliable and efficient(apart from 2.0tdi mess up).Really,it is about how you look after them and what fuel you put in them etc.

[DMitch16]

My point was not to mislead anyone (or sell anything - maybe I should apply for a job in advertising if it looks like an ad, just a thought?) nor to portray Common Rail as a worse system than Pumpe Duse but to state that each system has it's pros and cons. I did this very badly I'll admit.

I am not an avid fan of PD engines per se but have one now (no real issues except normal wear and tear due to the mileage) and have had a few vehicles in the past with Common Rail which did suffer the odd issue but no more or less than the PDs I've had either. VW probably assumed that other manufacturers would follow their lead with mass production of PD engines only to find that the others favoured CR systems. It's almost like Betamax versus VHS. Personally I would buy vehicles with either system as long as they were working properly but do quite like the quieter more modern CR engines too.

[zollaf]

i don't like common rails, too finnicky. give me a pd anyday, so much simpler and less to go wrong.

[martin1810]

There is no real comparison between PD and Cr in terms of performance. The CR design allows mutiple injection events over a broad range of timing. Early PD engines couldn't do this at all and the later PD injectors can only do a small number of multiple injections withinn a specific narrow range of timing. VW had to go CR to get better control over fuelling. Which you prefer is obviously a matter of personal taste.

[DSG4ME]

I personally would like to shift my B6 and get something else, the only thing I really hold on to it for is the DSG, I really like this feature and the thought of going back to a jerking autobox horrifies me.