awaschka

Headed North in a few days and CTD is turning over slow in moderate temps. Dealer tested battery and had a dead cell and failed battery test. $945 installed but they didn't have one. Can anyone provide battery specs (Advance auto says H8, Varta (for Euro models) say H9), don't know what to look for. Also any good local sources?

Thanks,

Quadcammer

There are about 30 battery threads but anyway.

H9 agm. Pick whatever parts store is closest.

Under 200 bucks, install is a pain but well documented if you search

awaschka

Thanks. I read a bunch of threads but saw H8 and H9 and nothing specific to the diesel. I have found an H9 but just wanted to be sure it would fit.

chsu74

H9 fits fine

r553

Follow up: we successfully put a Diehard H9 AGM battery into Al's CD this afternoon. All good. The original battery was an H8.

RS-America

2016 we did a 5,500 mile one way Arctic rally with the 4 year old original P-car battery.
No issues starting even at -36F
2020 Did the same rally, 5,120 miles one way, this Feb/March with a new proper sized Interstate. We had to get a jump start every morning we were north of the Arctic Circle.
Video from 2016 rally 'Otis' is at 4:08 --- Audi UR-Quattro at 4:18 --- Note we run Nokian Hakkapeliitta 8 tires
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CAVU

Forum members helping each other. Well done!!!

CAVU

What brand and size battery are you looking at to replace the Interstate with before your next Arctic Circle adventure?

RS-America

.
Going back the OEM battery from Porsche.
It was not fun jump starting every morning at these temps and conditions.
Here is an article we wrote for PCA on a Canadian rally previous to the Arctic rally:
- https://ww2.pca.org/news/oh-no-canada
Here is the 2020 article we wrote with input from two others:
- https://www.pca.org/news/2020-04-20/...can-5000-rally
When competing equipment issues do not get you a win. We had a bumper-to-bumper refresh on our 2013 diesel prior to doing the winter rally this year that went beyond the recommended scheduled maintenance. Worst conditions encountered this time were -40F, 60mph winds, with a blizzard.
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RS-America

Delete - duplicate post

RS-America

Which OBDII scan tool did y'all use to reprogram the battery charging cycle?
And - is it capable of forcing a regen?
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awaschka

Thanks Rob! I had to go directly on to Advance Auto Parts website and search H9 AGM for anything to come up. Their parts finder doesn't know the Diesel exists. First store had a wet cell and I bought it thinking it was an AGM. Found a different store with 4 AGMs in stock. Rob was terrific!