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VW Jetta TDI

3707 messages,  Last post on Nov 30, 2009 at 6:14 PM

You are in the Volkswagen Jetta Forum. Your Hosts are pat & karens

What is this discussion about? Volkswagen Jetta, Biodiesel, Diesel, Sedan


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#3117 of 3707
Re: Long Term Reliability [m6user] by Mr_Shiftright HOST
Jul 01, 2009 (1:41 pm)
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Replying to: m6user (Jul 01, 2009 12:19 pm)

No I think people buy what they like, and that people who buy *special* cars especially, they factor in many things besides reliability. I think the reason is that these *special* cars offer something they can't get elsewhere, and the consumer knows that. JD Power doesn't meaasure "emotional response" or things like "how it drives". BMW made a fortune on "how it drivers" but you won't find that listed.
 
RE: Break-In period -- I think modern cars are already broken in when you get them, pretty much. I never fuss over that, other than avoiding doing something really stupid with a car with 10 miles on it. But I think at 3,000 miles, you are more than done, and the car is fully broken in.
 
#3118 of 3707
smoking tdi by wile
Jul 01, 2009 (4:45 pm)
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I bought a 2003 Jetta TDi this january with 200,000 km's. every time I start out, it smokes black, sometimes for quite a while. My mechanice tells me to put a bottle of John Deere fuel conditioner in the tank with every fill, which I have been doing. He has manually cleaned out the EGR valve, and lubricated the turbo, but it still smokes.
#3119 of 3707
Re: Long Term Reliability [m6user] by jogousa
Jul 01, 2009 (5:22 pm)
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Replying to: m6user (Jul 01, 2009 12:19 pm)

Detroit profits were mostly on pick-ups and SUVs - that is where the factory/manufacturer makes most money. 4-door sedans/wagons segment is too crowded with a lot of competition and it costs more to assemble those.
#3120 of 3707
Re: New TDI [mike91326] by bpeebles
Jul 01, 2009 (5:23 pm)
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Replying to: mike91326 (Jun 28, 2009 6:59 pm)

The term "break in" is nearly archeac. Todays modern machining technology leaves metal surfaces almost perfect.
 
With that said, you need to concentrate on making the piston-rings seal as best as they can BEFORE the cylinder-walls glaze. It is nearly imposible to seal the rings after the walls are glazed. This type of engine tends to burn oil and get poor MPG.
 
Many words have been written about how to seal the rings to the cylinder-walls. Basically you need to use the turbocharger so the rings are forcefully pushed into the cylinder-walls. This means AGGRESSIVE ACCELLERATION - followed by DECELLERATION. You can start doing this after about 5,000 miles.... it takes over 20,000 miles to acheave full cylinder compression in a TDI.
 
You do this with a fully-warmed engine. While on highway in 5th gear allow vehcile to slow to about 40MPH....then use FULL THROTTLE to get up to about 70MPH ... followed by decel back to speed-limit. Then drive normally for at least 20 minutes to allow temp to stabilize.
 
Another way to do this is to use FULL THROTTLE ACCELLERAION from a stop to get up to 70MPH ... followed by decel back to speed-limit...again followed by cooldown period.
 
You should do this AT LEAST 4 times per tank of fuel as long as you own the vehicle. There are benefets to keeping the turbocharger clean too!
 
I personally seated the rings in my TDI using this process and enjoy up to 56MPG. (and have spreadsheet of every drop of fuel to prove it!) At over 100,000 miles, my engine is finally "loosened up" and running very well.
#3121 of 3707
Re: smoking tdi [wile] by jogousa
Jul 01, 2009 (5:24 pm)
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Replying to: wile (Jul 01, 2009 4:45 pm)

Back in the 70's I used RedLine diesel fuel additive - that reduced the smoke on my MB 240D.
#3122 of 3707
Re: New TDI [bpeebles] by Mr_Shiftright HOST
Jul 01, 2009 (6:13 pm)
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Replying to: bpeebles (Jul 01, 2009 5:23 pm)

That's an old motorcycle trick and I think it works. My last new car, that's what I did. Full throttle bursts but NOT to a high rpm, followed by deceleration...maybe up to 4000 rpm at most (gas engine). I did that "right out of the box" and let me tell you my particular car was faster than identical cars I drove (or by owners who drove mine). If not "faster" at least more responsive-feeling.
 
re: SMOKING -- probably dirty injectors, yep.
#3123 of 3707
Re: smoking tdi [wile] by sebring95
Jul 02, 2009 (4:35 am)
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Replying to: wile (Jul 01, 2009 4:45 pm)

Have you tried changing where you buy the fuel? The only time my '00 TDI smoked enough to notice was when I bought what I consider lousy fuel. You might ask them who/where their diesel comes from and then go find someone that gets their diesel elsewhere. Sometimes a lot of local stations will buy diesel from the same truck....so you have to check around. Calling a fuel distributor (bulk dealer) can help as well. Tell them you're looking for a low-sulphur, high cetane fuel and see what they say.
#3124 of 3707
Quality by ruking1
Jul 02, 2009 (6:36 am)
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I noticed this Forbes article on a www.tdiclub.com web site VW Tops Quality Survey
#3125 of 3707
Re: Quality [ruking1] by Mr_Shiftright HOST
Jul 02, 2009 (7:36 am)
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Replying to: ruking1 (Jul 02, 2009 6:36 am)

It seems to be a more "well-rounded" survey, which I like, rather than just statistics about these or those little problems. It's no wonder, with this broader outlook, that VW did better than Toyota.
 
"To get the rankings, Strategic Vision calculated the index based on survey questions about reliability, vehicle characteristics, dealership experience, styling, interior and exterior design and their overall perception of initial quality."
 
when it comes to strictly reliability surveys, I like to look at least 2-3 years in the field before judging a car. Sometimes early production glitches get fixed, so first year record doesn't look as good as second year and beyond---and other times, a car starts out great but problems develop in 40-50K miles.
#3126 of 3707
breakin / never a reason to redline / Re: New TDI [Mr_Shiftright] by elias
Jul 02, 2009 (7:58 am)
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Replying to: Mr_Shiftright (Jul 01, 2009 6:13 pm)

that's how i broke in all my Z28s & 05 GTO... I doubt such a break-in added any hamsters to my 06 TDI engine; I think most all the TDIs are laughably slow but very drivable due to torque.
04/05 passat TDI had decent grunt but also a now-apparent design flaw - chain driven oil pump apparently fails on *every* one of the 04/05 passat TDIs, and now VW sells a replacement gear-system instead. it's $2000+ job, and usually not under warranty. !
 
As far as TDI & redlining, i agree there's no reason to ever get close to redline or even yellow line, but seems like the consensus is that it's good to give the TDI a daily blast up to a decent rpm to let it the exhaust "blow its nose" of accrued soot in an old/DIRTY diesel, and let the turbo spread its 'vanes' .
 
for the new/CLEAN jetta TDI diesel, similarly blasting onto the the highway should help to ensure that the DPF can do its occasional cooking thing.

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