Thread: 09 PUMA... With water in fuel

Originally Posted by Captain_Rightfoot

So, why don't td5's have these problems as they are essentially the same engine technology? Are the breathers in different positions?

Well - the fellow is saying it's a common rail engine problem - the TD5 isn't a common rail engine.

Originally Posted by Scallops

Well - the fellow is saying it's a common rail engine problem - the TD5 isn't a common rail engine.

Yes it is

It's a computer controlled common rail diesel just like the Puma

Originally Posted by Captain_Rightfoot

Yes it is

It's a computer controlled common rail diesel just like the Puma

No it's not! This has been discussed before...

Td5 is it common rail ??

The TD5 has unit injectors, the unit injectors are a self contained high pressure pump injector and solenoid. There is no common rail in a TD5. The PUMA on the otehr hand operates at twice the pressure than the TD5, and has a high pressure continuous duty pump - a rail to store the pressure, and piezo electric injectors. They are very different technologies. The TD5 can cope with much more water than a CRD.

Having said that - I'm sticking in a R445-2 into my TD5 as soon as I can!

This issue is apparently VERY common in the last few years - there have been many CRD little cars written off by a bad tank of fuel. For example a Volkswagen diesel's fuel system costs $10k to rebuild. On a car worth $20k it's not really economical to do!

Originally Posted by BilboBoggles

The TD5 has unit injectors, the unit injectors are a self contained high pressure pump injector and solenoid. There is no common rail in a TD5. The PUMA on the otehr hand operates at twice the pressure than the TD5, and has a high pressure continuous duty pump - a rail to store the pressure, and piezo electric injectors. They are very different technologies. The TD5 can cope with much more water than a CRD.

Having said that - I'm sticking in a R445-2 into my TD5 as soon as I can!

This issue is apparently VERY common in the last few years - there have been many CRD little cars written off by a bad tank of fuel. For example a Volkswagen diesel's fuel system costs $10k to rebuild. On a car worth $20k it's not really economical to do!

Well that's interesting because I've always known the td5 to be common rail. Interestingly the td5 is sited as an example of common rail on the [ame="http://en.wikipedia.org/wiki/Common_rail"]wiki common rail page[/ame]. I checked the LR documentation and they describe it as a "Direct Injection Diesel" so looks like I've learnt something today. As has been said it does contain a common rail with high pressure fuel but then the injectors themselves amplify the pressure.

It's interesting though that it handles water better.. that's a bonus.

Originally Posted by Captain_Rightfoot

It's interesting though that it handles water better.. that's a bonus.

Come on, Captain - don't be scared by a little water - you now have yet another reason to trade up to the newer technology CRD Puma, with all it's fuel issues, vac pump issues, diff issues, prop shaft issues...

Problem with water is that if it sits in the TD5 injector - or the PUMA common rail for any length of time - the insides rust. The rust then flakes off into the fuel and acts as an abrasive to the injectors. On a TD5 - I assume because the only place it's pumped is in the fuel tank, and within the plunger of the injector there is much less chance for issues. But I have no doubt that water in a TD5 will cause the injectors to wear at a much faster rate. It's just that because a PUMA has incredibly close tolerances, and extreme pressure and there are more moving parts in a PUMA fuel system - it's destruction rate is near vertical.

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Cheers