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VW Jetta TDI

3757 messages,  Last post on Dec 07, 2009 at 4:45 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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#3530 of 3757
Re: OPTIMA battery not worth the cost. [Mr_Shiftright] by m6user
Nov 01, 2009 (11:48 am)
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Replying to: Mr_Shiftright (Nov 01, 2009 10:03 am)

Didn't know that. Why? Are the OEM batteries on a Jetta TDI a lot different than the gasser versions?
#3531 of 3757
Re: OPTIMA battery not worth the cost. [m6user] by Mr_Shiftright HOST
Nov 01, 2009 (12:24 pm)
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Replying to: m6user (Nov 01, 2009 11:48 am)

I would think the engineers would make the TDI battery more powerful, yes. Diesels are a compression-start engine as you know, and ultra-high compression engines need more powerful starter motors, which in turn.....
 
Also, there's a glow plug system to support, in addition to all the usual amenities of modern cars.
 
I'd expect the alternator to be different as well. .
#3532 of 3757
Re: OPTIMA battery not worth the cost. [Mr_Shiftright] by m6user
Nov 01, 2009 (2:01 pm)
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Replying to: Mr_Shiftright (Nov 01, 2009 12:24 pm)

Tks. Makes sense. It would be interesting to find out if they actually do use a significantly higher grade/more powerfull battery or is it the same battery just tasked harder.
#3533 of 3757
Cheese by chuckycheese
Nov 01, 2009 (2:05 pm)
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What is the capacity of manual transaxle for 2006 Jetta TDI? Also, what designation, i.e. SAE 80W-90, 75W-90, API GL-4? Thanks!
#3534 of 3757
Re: OPTIMA battery not worth the cost. [m6user] by jogousa
Nov 01, 2009 (3:18 pm)
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Replying to: m6user (Nov 01, 2009 2:01 pm)

Well AGM technology, originally developed in Germany, will soon dominate the U.S. auto battery market. Right now, Johnson Controls Company makes and distributes almost all major brands sold in the U.S., including batteries sold by Sears, Walmart, Costco as well as most major aftermarket brands sold in various auto parts stores.
Check this link, if you are interested to learn more. Lead-acid batteries will soon disappear!
 
http://www.themanufacturer.com/us/profile/204/Johnson_Controls
#3535 of 3757
Re: OPTIMA battery not worth the cost. [m6user] by bpeebles
Nov 01, 2009 (4:59 pm)
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Replying to: m6user (Nov 01, 2009 2:01 pm)

Consider yourself officially informed! The TDI battery is essentuially the most powerful LA battery that can fit in the battery-tray. The "gasser" volkswagens come thru with smaller, less-powerful batteries. (less lead = less weight = lower freight charges to ship the vehicles over the ocean.)
 
NOTE: Most batteries are priced such that the COST is the same for a given "grade" battery. This means, people with "gasser" VWs can ask to have the TDI battery installed and the COST will not be any different than installing the origial-sized battery.
I have done this on virtually every "gasser" VW I have owned since my 1979 VW Scirocco.
#3536 of 3757
Re: OPTIMA battery not worth the cost. [m6user] by bpeebles
Nov 01, 2009 (5:04 pm)
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Replying to: m6user (Nov 01, 2009 9:28 am)

I agree with you... the ONLY time I have seen need for a fancy AGM (Odyssey) battery was in a vehicle modified for drag-racing. To reduce weight and gain space for the turbocharger-plumbing.
 
I found it amazing that a battery smaller than my motorcycle-battery could start that engine.... but that is the magic of a $230 battery.
 
Personally, I will stick with $80 LA batteries in my road-going vehicles. They last over 5 years even thru Vermont winters starting the engine at -15F.
#3537 of 3757
manual xmission fluid [chuckycheese] by bpeebles
Nov 01, 2009 (5:57 pm)
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Replying to: chuckycheese (Nov 01, 2009 2:05 pm)

For VW/Audi xmissions, many people have "experimented" and found that the original G070 fluid is the VERY BEST in those xmissions.
 
RedLine MT90 comes in a close 2nd.\
 
As for capacity... I do not have the factory service manual in front of me but I seem to recall the capacity is 2L
#3538 of 3757
Re: OPTIMA battery not worth the cost. [bpeebles] by Mr_Shiftright HOST
Nov 01, 2009 (6:28 pm)
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Replying to: bpeebles (Nov 01, 2009 5:04 pm)

You could probably power your ignition system with 8/ 1.5V flashlight batteries---but of course not much else and only for a short time.
 
But not glow plugs---they are a heavy draw, which is why they carry a what....80 amp fuse? 50 amps? Something like that. My Benz diesel needed 80 amp fusing.
#3539 of 3757
tjburkejr by tjburkejr
Nov 01, 2009 (7:45 pm)
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I have a 2009 Jetta TDI with 6,700 miles. I have now had dashboard warning lights come on twice, the first for emissions and the second, now, for an airbag fault. I live in Colorado, where we just had a freak autumn snowstorm of about 20 inches. The airbag fault light came on around then. I thought the sensor might just have got wet. It was a lot of snow.
 
When I took the vehicle to the dealer for the first emissions light incident, the tech said he couldn't reproduce the fault. He told me that the computer will find what it thinks is a fault, turn on a warning light, and then keeps on testing. If it can't reproduce the circumstance that caused the fault light to go on the first time, it turns itself out. Is this true?
 
If so, I wonder if the airbag fault light is the same sort of thing.
 
Any ideas on how to avoid killing a day with the car at the dealer for every time a fault light comes on and probably doesn't mean anything significant?

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