997 Gen 2 DFI Engines - Woes finally sorted?

997 Gen 2 DFI Engines - Woes finally sorted?

Author
Discussion

burman

355 posts

212 months

Wednesday 1st January 2014
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Just traded up to a GEN 2s, my third 911, did 30,000 miles in an 03 C4S and 12,000 miles in an immaculate 997 gen1 C2S with no engine issues whatever except ignition coil replacement on C4S, also have 2 yrs OPC warranty on new car for peace of mind but will be surprised if I need it

projectgt

318 posts

159 months

Thursday 2nd January 2014
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It would be interesting to hear from someone who has covered a lot of miles in a direct injection car, any issues etc.

A quick look on autotrader showed cars on 50,000 miles.

DT398

1,745 posts

147 months

Thursday 2nd January 2014
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projectgt said:
It would be interesting to hear from someone who has covered a lot of miles in a direct injection car, any issues etc.

A quick look on autotrader showed cars on 50,000 miles.
I'm sure that if there had been any real issues we would have heard. What was a relatively small number of failures with the Gen1 cars got a huge billing on the internet. Almost total silence on the DFI engines can only be good news, unless there's some high mileage issue waiting to happen as you say. I suppose all engines with high mileage will have problems at some point or other but there does not seem to be anything endemic so far with the DFI engines.

Ekona

1,652 posts

201 months

Thursday 2nd January 2014
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projectgt said:
It would be interesting to hear from someone who has covered a lot of miles in a direct injection car, any issues etc.

A quick look on autotrader showed cars on 50,000 miles.
Mine's done 42K now, and I've had zero issues with the engine at all. I've had the fuel pump replaced under the recall, but that's as close as I've got to an actual fault. It still pulls as strong as it's ever done, and I've no reason to believe that there's anything nefarious going on in there.

Wills2

22,666 posts

174 months

Thursday 2nd January 2014
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projectgt said:
It would be interesting to hear from someone who has covered a lot of miles in a direct injection car, any issues etc.

A quick look on autotrader showed cars on 50,000 miles.
I did over 50,000 miles in my Gen2 C2S, the only engine related issues were a solenoid and the recall on the fuel pump.




Technomad

753 posts

162 months

Thursday 2nd January 2014
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burman said:
Just traded up to a GEN 2s, my third 911, did 30,000 miles in an 03 C4S and 12,000 miles in an immaculate 997 gen1 C2S with no engine issues whatever except ignition coil replacement on C4S, also have 2 yrs OPC warranty on new car for peace of mind but will be surprised if I need it
I'm a year into my gen 2 C2S and am about to invoke the OPC warranty for a minor coolant leak - which does however require considerable labour. No other engine related issues @ 22k miles but I've used the warranty for a central locking issue and having both rear lights replaced as they filled with water. Corrosion of the wheels wasn't covered but they did do a goodwill refurb (however badly).

WindyMiller67

426 posts

139 months

Thursday 2nd January 2014
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My Gen 2 T4S is coming up to 50k miles although I've only done the last 5k. Next time it's at OPC I will ask if it's had any specific engine warranty work.
During my 5k miles I've had an exhaust oxygen sensor go (but this may have been self-inflicted by driving through a large puddle!).
Mine does use its Mobil 1. I would say 0.25l per 1000 miles which worries me, but is within spec. It worries me because others say theirs don't use a drop between services.
No evidence of a leak on the driveway.

Wills2

22,666 posts

174 months

Thursday 2nd January 2014
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Mine didn't use any oil, but plenty of people suffer from oil useage so I'd say it's normalish.


Magic919

14,126 posts

200 months

Thursday 2nd January 2014
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On the C2S my first engine could drink a litre in well under a 1000 miles. The new engine uses virtually none.

The C4S on original engine just doesn't use oil.

Whether this is running-in, engine tolerances or something else I don't know.

GuitarPlayer63

198 posts

148 months

Thursday 2nd January 2014
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I've covered over 39,000 miles in my Gen2 997 C2 (it's got 53,000 on the clock) and the issues this far have been the HPF pump under warranty, a lambda sensor and a failed door lock.

It does drink oil though - probably 0.5l every 1,000 miles - and with the long service intervals I reckon it will have had the oil replaced completely in between services with the regular top-ups.

As to whether to renew the Porsche warranty this year - that's a very good question which I haven't yet decided on...

av185

18,432 posts

126 months

Thursday 2nd January 2014
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Done roughly 5000 miles in each of 4 gen2s.... 2xC2s C4s Targa and 9000 miles in a GTS none of which have shown any excessive oil consumption only minor topping up.

No track use only varied partly spirited A and B road driving.

This wide variation in oil consumption others have posted is puzzling...confused

My cars have all been PDK. There is a strong suggestion that the way a car is run in could well determine how good the engine is and degree of oil consumption later in its life.

Clearly excessive revs when new is not advisable but "mollycoddling" the engine is equally detrimental and labouring it is probably the worst case scenario. yes

Because PDK is more "nanny state" as compared to "manuel", it is impossible to labour the engine.

Could the majority of the "oil burners" perhaps be "manuel" transmission the engines of which could have been laboured when new...........idea

Wills2

22,666 posts

174 months

Thursday 2nd January 2014
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av185 said:
Could the majority of the "oil burners" perhaps be "manuel" transmission the engines of which could have been laboured when new...........idea
qué?

av185

18,432 posts

126 months

Thursday 2nd January 2014
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Wills2 said:
av185 said:
Could the majority of the "oil burners" perhaps be "manuel" transmission the engines of which could have been laboured when new...........idea
qué?
laugh

WindyMiller67

426 posts

139 months

Thursday 2nd January 2014
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av185 said:
Could the majority of the "oil burners" perhaps be "manuel" transmission the engines of which could have been laboured when new...........idea
Nope - mine is PDK!

Magic mentioned tolerances earlier - you'd hope Porsche's were both close and consistent, so it is looking more like the initial running in.

Under normal driving conditions is everyone's water temp at 80C and oil temp at 90C?

Magic919

14,126 posts

200 months

Thursday 2nd January 2014
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Do you think the gauges show accurate figures? Didn't show the correct water temp on earlier cars when checked against ODB port.

Technomad

753 posts

162 months

Thursday 2nd January 2014
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Wills2 said:
Mine didn't use any oil, but plenty of people suffer from oil useage so I'd say it's normalish.
My C2S (manual+SSK) had 13,000 on the clock when I bought it - to 16000 miles, it used oil at c.5000miles/litre. to 18500, it used the stuff at 4000miles/litre and, at 22000 miles, it's averaging 2100miles/litre - higher than I'd like but OPC assures me it's within spec of 1l/1000miles. What's changed? Such evidence as I have suggests that the car was pretty lightly worked by its first two owners - and there were no rev ranges showing on the DME report at purchase. Over the first couple of '000 miles I had the car, I was just getting used to it and wasn't giving it full welly, as evidenced by the 27-29mpg I was getting. After a full year-and-a-bit I've been learning to use more of the performance and my fuel consumption is down to 23-25mpg. It's perhaps therefore not surprising that it's now burning more oil. I've much more experience of high-performance engines in bikes than cars, where there's plenty of evidence that using them sensibly but hard from new results in lower oil burning as the miles rise, so wonder if the same is true of our Porsches?

Wills2

22,666 posts

174 months

Thursday 2nd January 2014
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Technomad said:
Wills2 said:
Mine didn't use any oil, but plenty of people suffer from oil useage so I'd say it's normalish.
My C2S (manual+SSK) had 13,000 on the clock when I bought it - to 16000 miles, it used oil at c.5000miles/litre. to 18500, it used the stuff at 4000miles/litre and, at 22000 miles, it's averaging 2100miles/litre - higher than I'd like but OPC assures me it's within spec of 1l/1000miles. What's changed? Such evidence as I have suggests that the car was pretty lightly worked by its first two owners - and there were no rev ranges showing on the DME report at purchase. Over the first couple of '000 miles I had the car, I was just getting used to it and wasn't giving it full welly, as evidenced by the 27-29mpg I was getting. After a full year-and-a-bit I've been learning to use more of the performance and my fuel consumption is down to 23-25mpg. It's perhaps therefore not surprising that it's now burning more oil. I've much more experience of high-performance engines in bikes than cars, where there's plenty of evidence that using them sensibly but hard from new results in lower oil burning as the miles rise, so wonder if the same is true of our Porsches?
Perhaps, I had mine from new so followed the "hard but fair" procedure, made sure the engine had plenty of load but didn't hang onto high revs for the first couple of K but still extended the engine.

Porsche didn't recommend a running period on the gen2 so I followed what I thought was right.

Mine had the SSK as well and I miss that gearbox so much.

RiccardoG

1,584 posts

271 months

Thursday 2nd January 2014
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So, with the prices of the earlier Gen 2s now being within "an engine rebuild" of the last Gen 1s (ie: ~£10k) does this mean its a good idea for me to consider a Gen 2? Man maths at its best! smile

mollytherocker

Original Poster:

14,365 posts

208 months

Thursday 2nd January 2014
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RiccardoG said:
So, with the prices of the earlier Gen 2s now being within "an engine rebuild" of the last Gen 1s (ie: ~£10k) does this mean its a good idea for me to consider a Gen 2? Man maths at its best! smile
I think so.

V800MJH

503 posts

156 months

Monday 20th April 2015
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Nice read on this thread.