NHTSA Update on CR HPFP failure investigation - Page 229

Softrockrenegade · May 10th, 2012, 08:25

I thought there was a passat that had a pump go due to misfueling ?

Mike_04GolfTDI · May 10th, 2012, 08:30

Quote:

Originally Posted by 2010TDIWagen

UPDATE: VW regional case manager just called me. Offered me +1yr & 10,000 Mile extension warranty on this part. Guess what. She told me this repair is only covered under the 36,000 mile bumper to bumper warranty and is NOT covered under the powertrain warranty!!!!!! F'k VW. This will be our last VW/Audi product.

If I'm not mistaken, all VW repairs are warranted for 1yr & 10,000 miles. So they were offering something you were going to get anyway.

Scratch that... I looked it up on their website:

"Genuine Volkswagen Parts and Accessories are covered by a limited warranty for 12 months or 12,000 miles, whichever occurs first. See your dealer for details."

http://www.vw.com/en/owners/parts-an...s/service.html

So they were going to offer you less than the regular warranty on the part. Nice try!

dweisel · May 10th, 2012, 08:33

Quote:

Originally Posted by Niner

who managed to get inside of one of the 2012 passat Basch HPFP's to confirm this, or where did you find this internet nugget of information?

I guess I'd like to know your source of this information.

You mean you guys missed this one? I have no idea what thread it was in,but its here somewhere. Mr. 2Micron to date is the only mortal known to mankind that has actually disassembled a Czech. You guys have to learn to pay closer attention.

2Micron is also probably going to be the Saint of VW CR's before its all over.

Lightflyer1 · May 10th, 2012, 08:50

Maybe here?

http://forums.tdiclub.com/showpost.p...postcount=1585

dweisel · May 10th, 2012, 13:16

Czech made hpfp piston cup/follower on right. Note: NO COATING. Photo credit to 2Micron.

http://m1059.photobucket.com/albumvi....html?newest=1

pknopp · May 10th, 2012, 14:00

Should be an easy swap. No?

dweisel · May 10th, 2012, 14:12

Quote:

Originally Posted by pknopp

Should be an easy swap. No?

NO! If you are talking about just swapping out the piston cup/follower. The new piston cup could actually wear out an old style pump bore FASTER than an the original piston cup. Its just not that simple.The hardness of both the pump bore and piston cup have to be compatable. Swapping out a Czech pump for and older revision pump shouldn't be a problem though.

dweisel · May 10th, 2012, 14:20

Quote:

Originally Posted by Softrockrenegade

I thought there was a passat that had a pump go due to misfueling ?

Yes,there was a 2012 Passat that was misfueled by the dealer and failed with just over 40 miles. 2Micron has a 12 Passat failed pump that also came off a car that was misfueled. I would think there are a few other misfuel failures,but those are the only two that I am aware of. NO failures have been reported here that have not been attributed to misfuels.

Niner · May 10th, 2012, 18:53

Quote:

Originally Posted by dweisel

Yes,there was a 2012 Passat that was misfueled by the dealer and failed with just over 40 miles. 2Micron has a 12 Passat failed pump that also came off a car that was misfueled. I would think there are a few other misfuel failures,but those are the only two that I am aware of. NO failures have been reported here that have not been attributed to misfuels.

4000 miles on my 2012 passat... B2 since the moment I drove it off the lot, with 17 miles on it. PS White thrown in also 3 to 4 oz per fillup, to keep the fuel dry. Most fill ups around 10-14 gallons at most. Have my fingers crossed, running a 6M and not revving it hard, or high or near redline, hopefully helps it last.

darrelld · May 10th, 2012, 19:43

Quote:

Originally Posted by Niner

4000 miles on my 2012 passat... B2 since the moment I drove it off the lot, with 17 miles on it. PS White thrown in also 3 to 4 oz per fillup, to keep the fuel dry. Most fill ups around 10-14 gallons at most. Have my fingers crossed, running a 6M and not revving it hard, or high or near redline, hopefully helps it last.

I have 8000 now on my Passat and 18000 on my Jetta, usually buy the cheapest, Walmart, that I can find.

At my last Walmart fuel-up they now have a sticker that says 5% biodiesel. So now I have a cheap close 5% bio source, emailed their customer support about where the bio was sourced. The response was all bio had to meet the specs as described on biodiesel.org.

My experiment of running straight D2 with no additives in the Texas heat like your average Joe is over.

darrelld · May 11th, 2012, 07:44

Quote:

Originally Posted by dweisel

Yes,there was a 2012 Passat that was misfueled by the dealer and failed with just over 40 miles. 2Micron has a 12 Passat failed pump that also came off a car that was misfueled. I would think there are a few other misfuel failures,but those are the only two that I am aware of. NO failures have been reported here that have not been attributed to misfuels.

Sooo the next logical question is, does the new pump turn into an IED like the previous model?

Niner · May 11th, 2012, 08:00

Quote:

Originally Posted by darrelld

Sooo the next logical question is, does the new pump turn into an IED like the previous model?

An aluminum bore is an aluminum bore... starve it of lubrication, and it is a sacrificial metal, it's going to shed bits and pieces, everywhere. Does anyone remember the aluminum bored block failures from Chevy Vega's from the early 1970's? And that was with an oil batch for lubrication.

As long as the housing and bore are made out of aluminum, I don't see this being a fuel pump capable of 300,000 + or more miles before failure, not like the older Bosch VE pumps, pre common rail, like in our A4's.

dweisel · May 11th, 2012, 08:37

Quote:

Originally Posted by darrelld

Sooo the next logical question is, does the new pump turn into an IED like the previous model?

LOL! Well there have NEVER been ANY EXPLOSIONS yet in any VW CR hpfp. Bad choice of words IMO. Total fuel system contamination,YES. EXPLOSION, NO.

I would suspect the Passat CR fuel system would be subject to the same fuel system contamination as the earlier VW CR's. As of yet we have not had a report here on the forum of a 2012 Passat CR having a hpfp failure that was not misfueled. Which is a good thing. Maybe Bosch has finally come up with the correct metallurgy to make this pump have a long service life. Only time will tell.

scdevon · May 11th, 2012, 10:53

Quote:

Originally Posted by Niner

An aluminum bore is an aluminum bore...

As long as the housing and bore are made out of aluminum, I don't see this being a fuel pump capable of 300,000 + or more miles before failure, not like the older Bosch VE pumps, pre common rail, like in our A4's.

The CP4.1 has a steel piston. You realize that a steel piston has to ride in a bore made of another material besides steel, right? An aluminum piston riding in a steel bore is not an option for the CP4.1 pump due to the extreme duty cycle of the double lobe cam design. An aluminum piston would get the crap knocked out of it.

The bore is not aluminum because Bosch and VW "cheaped out". It's aluminum because it has to be aluminum.

Niner · May 11th, 2012, 11:26

Quote:

Originally Posted by dweisel

LOL! Well there have NEVER been ANY EXPLOSIONS yet in any VW CR hpfp. Bad choice of words IMO. Total fuel system contamination,YES. EXPLOSION, NO.
I would suspect the Passat CR fuel system would be subject to the same fuel system contamination as the earlier VW CR's. As of yet we have not had a report here on the forum of a 2012 Passat CR having a hpfp failure that was not misfueled. Which is a good thing. Maybe Bosch has finally come up with the correct metallurgy to make this pump have a long service life. Only time will tell.

It's still a fragment bomb, like a grenade, with a real slow fuse, that eventually kills the pump and the whole fuel system in short order.