Marius's Touareg R5 life thread. - Page 74




Page 74 of 153 FirstFirst ... 24 49 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 99 124 ... LastLast
Results 1,461 to 1,480 of 3060
  1. #1461
    Join Date
    Dec 2011
    Location
    East London
    Age
    33
    Posts
    14,765
    Thanked: 947

  2. #1462
    Join Date
    Dec 2011
    Location
    East London
    Age
    33
    Posts
    14,765
    Thanked: 947

    Default

    I spoke too soon.

    wanted to go to a friend. Got on the highway and it's still missing under load.

    VCDS reveals no codes.

    I suspect it might be the injector harnass.

    Eish. Feeling pretty down now to still have the issue after the breakdown, injector swap for nothing....

  3. #1463
    Join Date
    Dec 2011
    Location
    East London
    Age
    33
    Posts
    14,765
    Thanked: 947

    Default

    at light throttle the car is perfect and when stationary it revs up fine as well with no miss.

  4. #1464
    Join Date
    Dec 2011
    Location
    East London
    Age
    33
    Posts
    14,765
    Thanked: 947

    Default

    I suspect I know what the issue is.

    Apparently the loom is a common issue on the 1.9 TDi's which is identical to the R5 except the R5 has an extra connector.

    The loom is a very basic wiring system and shares a coomon ground that comes from the end of the loom.

    I suspect due to the fact that the loom sits in a hot oily climate it can be prone to corrosion on the ground connection.

    I think I will just spray some cleaner on the bundle and then some flux and then solder these connections together. Why VW didn't do so from the get go escapes my mind.







    My suspect!

  5. #1465
    Join Date
    Dec 2011
    Location
    East London
    Age
    33
    Posts
    14,765
    Thanked: 947

    Default

    Looking at the pics now, I think I should solder the spade connectors as well.

    Do it once right heh?

  6. #1466
    Join Date
    Dec 2011
    Location
    East London
    Age
    33
    Posts
    14,765
    Thanked: 947

    Default

    quick question : what is solder's melting temperature?

    I don't want the solder to melt when the engine is working hard.

  7. #1467
    Join Date
    Sep 2006
    Location
    Vredeslof
    Age
    43
    Posts
    285
    Thanked: 0

    Default

    Quote Originally Posted by MariusFourie View Post
    quick question : what is solder's melting temperature?

    I don't want the solder to melt when the engine is working hard.
    For normal solder used in electronics it is around 180 degrees. You also get high temp solder, but its fairly scarce
    Last edited by cacti; 2014/03/04 at 09:31 PM. Reason: Typo

  8. #1468
    Join Date
    Dec 2011
    Location
    East London
    Age
    33
    Posts
    14,765
    Thanked: 947

    Default

    Quote Originally Posted by cacti View Post
    For normal solder used in electronics it is around 180 degrees. You also get high temp solder, but its fairly scares.
    Thanks. Will a solder connection there last the oil and heat cycles inside an engine?

  9. #1469
    Join Date
    May 2009
    Location
    Hillcrest, Malaysia
    Age
    61
    Posts
    16,017
    Thanked: 2143

    Default

    Quote Originally Posted by MariusFourie View Post
    quick question : what is solder's melting temperature?

    I don't want the solder to melt when the engine is working hard.
    Normally about 300 deg C., but I am not going to google for the exact temp.

    Soldered connections are about the worst possible option. Crimp connections are the only option on high reliability circuits.

    If you look at the wiring loom of a Jet Fighter you won't find one single soldered connection.
    Cheers

    ZS5KAD Yeasu Ft-897D
    2 V8's a V6 and an inline 4
    The nice thing about going the extra mile - the road is never congested.

  10. #1470
    Join Date
    Sep 2006
    Location
    Vredeslof
    Age
    43
    Posts
    285
    Thanked: 0

    Default

    Quote Originally Posted by MariusFourie View Post
    Thanks. Will a solder connection there last the oil and heat cycles inside an engine?
    I don't think oil is an issue... But what temperature does the oil get?

  11. #1471
    Join Date
    Sep 2006
    Location
    Vredeslof
    Age
    43
    Posts
    285
    Thanked: 0

    Default

    Quote Originally Posted by Fluffy View Post
    Normally about 300 deg C., but I am not going to google for the exact temp.

    Soldered connections are about the worst possible option. Crimp connections are the only option on high reliability circuits.

    If you look at the wiring loom of a Jet Fighter you won't find one single soldered connection.
    Fluffy you get HMP solder that is rated at around 300 degrees. Normal solder is around 180 depending on the make. I build a reflow oven for surface mount electronics a while ago and the solder that I used to fix the probe to a temporary pcb melt at 183 degrees. Since solder paste must heat up to around 230 degrees I had to use HMP solder.

  12. #1472
    Join Date
    Dec 2011
    Location
    East London
    Age
    33
    Posts
    14,765
    Thanked: 947

    Default

    Quote Originally Posted by Fluffy View Post
    Normally about 300 deg C., but I am not going to google for the exact temp.

    Soldered connections are about the worst possible option. Crimp connections are the only option on high reliability circuits.

    If you look at the wiring loom of a Jet Fighter you won't find one single soldered connection.
    That's very interesting. I always thought solder was a better connection. Not in terms of reliability but in terms of conductivity.

    I don't want to remove the crimp that is currently there. I want to clean the oil from that crimp connection and add a solder connection on top. Basically put a drop of solder there and blow torch for a couple of seconds to get the soler melting into the crimp connection.

    my main concern is the heat cycles. Can the soldered connection cope with the heat cycles or will it go brittle?

  13. #1473
    Join Date
    May 2009
    Location
    Hillcrest, Malaysia
    Age
    61
    Posts
    16,017
    Thanked: 2143

    Default

    Quote Originally Posted by cacti View Post
    Fluffy you get HMP solder that is rated at around 300 degrees. Normal solder is around 180 depending on the make. I build a reflow oven for surface mount electronics a while ago and the solder that I used to fix the probe to a temporary pcb melt at 183 degrees. Since solder paste must heat up to around 230 degrees I had to use HMP solder.
    Agree 100%.

    I was inappropriately referring to ROHS compliant materials in a specific area of application. Hence the referral to the crimp connections in wiring looms.

    Automated PCB assembly has it's own set of very special materials and requirements.

    Either way, and the point of my post, one would be hard pressed to find a soldered joint on a modern car wiring loom.
    Cheers

    ZS5KAD Yeasu Ft-897D
    2 V8's a V6 and an inline 4
    The nice thing about going the extra mile - the road is never congested.

  14. #1474
    Join Date
    Sep 2006
    Location
    Vredeslof
    Age
    43
    Posts
    285
    Thanked: 0

    Default

    Quote Originally Posted by Fluffy View Post
    Either way, and the point of my post, one would be hard pressed to find a soldered joint on a modern car wiring loom.
    +1

  15. #1475
    Join Date
    Dec 2011
    Location
    East London
    Age
    33
    Posts
    14,765
    Thanked: 947

    Default

    Quote Originally Posted by Fluffy View Post

    Either way, and the point of my post, one would be hard pressed to find a soldered joint on a modern car wiring loom.
    do you maintain that a crimp connection is the better connection in my intended application in a hot oily heat cycle environment?

    Perhaps cost is a factor as soldered connections takes more time and costs more than crimp connections.
    Last edited by MariusFourie; 2014/03/04 at 09:58 PM.

  16. #1476
    Join Date
    May 2009
    Location
    Hillcrest, Malaysia
    Age
    61
    Posts
    16,017
    Thanked: 2143

    Default

    Quote Originally Posted by MariusFourie View Post
    do you maintain that a crimp connection is the better connection in my intended application in a hot oily heat cycle environment?

    Perhaps cost is a factor as soldered connections takes more time and costs more than crimp connections.
    Nope, a proper crimp connection is just far superior in every possible way.
    Cheers

    ZS5KAD Yeasu Ft-897D
    2 V8's a V6 and an inline 4
    The nice thing about going the extra mile - the road is never congested.

  17. #1477
    Join Date
    Dec 2011
    Location
    East London
    Age
    33
    Posts
    14,765
    Thanked: 947

  18. #1478
    Join Date
    Jul 2010
    Location
    Greenstone
    Age
    43
    Posts
    447
    Thanked: 41

    Default

    Hi Marius,
    Make sure that the actual injector harness connections are good. I had a miss under load that was traced to the injector connections, I re tensioned the two pins on each injector and the miss has gone for good.
    Those connectors are subjected to heat cycles as well as high frequency vibrations,
    Range Rover Sport 5.0 SC
    Lotus 7 replica racecar.
    Ex R5 Touareg with air and RDL

  19. #1479
    Join Date
    Dec 2011
    Location
    East London
    Age
    33
    Posts
    14,765
    Thanked: 947

    Default

    Thanks Rowan.

    I had the same idea so I did just that with the harness from the old engine, as well as extra crimping the ground junction.

    I have just changed out the harness and about to go for a test drive.

    Hold thumbs.

  20. #1480
    Join Date
    Jun 2010
    Location
    Port Elizabeth
    Age
    33
    Posts
    4,093
    Thanked: 297

    Thumbs up

    Quote Originally Posted by MariusFourie View Post
    Thanks Rowan.

    I had the same idea so I did just that with the harness from the old engine, as well as extra crimping the ground junction.

    I have just changed out the harness and about to go for a test drive.

    Hold thumbs.
    Holding thumbs!
    Sent from my iPhone


Page 74 of 153 FirstFirst ... 24 49 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 99 124 ... LastLast

Similar Threads

  1. New Touareg 3, RNS 850 Firmware Update
    By DJMAXIZA in forum Volkswagen
    Replies: 43
    Last Post: 2017/08/07, 07:03 AM
  2. Tyre life and tread percentage
    By rechardt in forum Tyre chat
    Replies: 8
    Last Post: 2014/11/13, 12:34 PM
  3. Life - II
    By JDeV in forum The 4x4 Pub
    Replies: 23
    Last Post: 2014/09/10, 11:33 AM
  4. Touareg Spare and a Prado lurking in the dark
    By amaTokka in forum Volkswagen
    Replies: 9
    Last Post: 2014/04/24, 08:59 PM
  5. VW Touareg
    By 4ePajero in forum Volkswagen
    Replies: 3
    Last Post: 2008/05/01, 12:18 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •