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Thread: m52 Turbo Build

  1. #1026
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    Quote Originally Posted by vollosso View Post
    Turbo seals are like piston rings. You cannot really kill them like this. The only way they die is from excessive wear.


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    Well then I guess the next step would be (since it was working adequately prior to my escapade)

    1. Check return lines for kinks
    2. Pull pump and connect it to a battery with a couple buckets of fluid and see how its draining

  2. #1027
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    Not sure if oil being fed to pump without it running could damage it or not either? Just doesn't make sense that it was working fine prior...

    Could angling of the oil feed effect it?


  3. #1028
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    Quote Originally Posted by 328iFun View Post
    Well then I guess the next step would be (since it was working adequately prior to my escapade)

    1. Check return lines for kinks
    2. Pull pump and connect it to a battery with a couple buckets of fluid and see how its draining
    Yeah.. Maybe the pump went bad or the shaft broke, or something. Get pics maybe we can spot something.

    I dont like cheap pumps like that, they always have cheap gears and come full of trash. Did you clean it before installing it :eek


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  4. #1029
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    Quote Originally Posted by vollosso View Post
    Yeah.. Maybe the pump went bad or the shaft broke, or something. Get pics maybe we can spot something.

    I dont like cheap pumps like that, they always have cheap gears and come full of trash. Did you clean it before installing it :eek


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    Yeah, I know. I didn't notice any debris in before installation. I removed the fittings and didn't see anything. I have another new pump identical to it.

    I'll take some pics when I get home

  5. #1030
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    When doing a compression test should we be looking for the same numbers Bentley states? Or should they be looking for lower numbers since the compression has been dropped from 10:1 to 9:1 or 8:1?

    Or should it just take an additional revolution or so to reach the desired compression since the chamber has expanded in size?

  6. #1031
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    It will be lower vs Bentley.

    You have a lower peak cylinder pressure at atmospheric so regardless of cranks it will be lower.


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    1989 535i - sold
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    2004 Built motor TiAg/Black - Sold
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    1998 Turbo: PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Arp 2k Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, , Poly engine mounts, UUC trans mounts W/ enforcers, 22RPD OBD2 Stock ECU id1700 E85 tune, 22RPD Big power Transmission swap w/ GS6-53

  7. #1032
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    Quote Originally Posted by vollosso View Post
    It will be lower vs Bentley.

    You have a lower peak cylinder pressure at atmospheric so regardless of cranks it will be lower.


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    Good to know. I think my numbers are fine then

  8. #1033
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    If polarity is reversed the pump should pull the opposite direction, correct?

    And it should pull the same amount of oil regardless of direction?

  9. #1034
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    Fwiw I ran that exact same ebay pump for a long time. Always worked perfectly for me and I only removed it cause it was ungodly loud.

    I run a 4an unrestricted oil feed and had 0 smoke with that pump. I had that pump roughly level with the turbo drain, however I have always run a sump off the turbo. I would run it for 3-5 seconds after shut down and never get smoke on start up.

  10. #1035
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    Quote Originally Posted by rajicase View Post
    Fwiw I ran that exact same ebay pump for a long time. Always worked perfectly for me and I only removed it cause it was ungodly loud.

    I run a 4an unrestricted oil feed and had 0 smoke with that pump. I had that pump roughly level with the turbo drain, however I have always run a sump off the turbo. I would run it for 3-5 seconds after shut down and never get smoke on start up.
    Yup, I've had zero smoke until the pump didn't turn on and I went out my driveway. And I haven't used a sump

    Now smoke is pretty consistent

    Are you draining to CCV tube? What sump did you use?

  11. #1036
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    If you dumped a bunch of oil in your exhaust, it may smoke for some time. I know you said that once hot and idling it is not smoking much, but maybe when cold the condensation mixes with oil residue and burns off with smoke. When everything worked fine before, it should continue to work fine. The only thing that changed is that you did not turn on your scavenge pump. I would never run a manual scavenge pump or electric fan. I have used them only with automatic triggers to eliminate forgetfulness on my part.

  12. #1037
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    Your running the drain up to plug on the front of the vanos unit if I remember correctly right? If so what is probably happening is the oil sitting in the tube when you shut it off is draining back through the pump and filling up the turbo which will leak past the seals front and back when its sitting.


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  13. #1038
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    Quote Originally Posted by pbonsalb View Post
    If you dumped a bunch of oil in your exhaust, it may smoke for some time. I know you said that once hot and idling it is not smoking much, but maybe when cold the condensation mixes with oil residue and burns off with smoke. When everything worked fine before, it should continue to work fine. The only thing that changed is that you did not turn on your scavenge pump. I would never run a manual scavenge pump or electric fan. I have used them only with automatic triggers to eliminate forgetfulness on my part.
    I run 2 electric fans on IGN+, they run continuously. The intercooler is so large that the radiator doesn't get an continuous air flow through it. I was overheating in 100+ weather. The Spump is on at ign + as well

    I would have thought most of the oil would have burnt by now or exited the exhaust, especially taking up down the road at WOT several times... I let the car run for sometime when it initially happened until the smoke cleared.

    And other than moving the turbo feed line slightly, no changes where made.

    - - - Updated - - -

    Quote Originally Posted by someguy2800 View Post
    Your running the drain up to plug on the front of the vanos unit if I remember correctly right? If so what is probably happening is the oil sitting in the tube when you shut it off is draining back through the pump and filling up the turbo which will leak past the seals front and back when its sitting.
    No, I changed that out awhile back



    That's how its setup now ^
    Last edited by 328iFun; 09-27-2017 at 11:15 AM.

  14. #1039
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    Heres a better diagram:


    photos uploaded

  15. #1040
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    I don't see any problem with the layout. It worked before. But if you want the belt and suspenders approach, use a small sump under the turbo, a checkvalve in the feed line, a vent line upwards not far after the turbo drain, a pump timer to run it after shutdown and maybe even a checkvalve on the pump output since whatever is in the dipstick tube line will flow back down to the pump and maybe through it towards the turbo.

    Years ago while supercharged with a V2, I drained to the dipstick tube stem. To help it drain, I drilled a 5/16 hole all the way through the tube and out the other side just after it entered the pan. That assisted a gravity drain. Not sure whether it would help your pumped drain but it certainly won't hurt anything.

  16. #1041
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    If you can easily access the fitting it would be a good idea to disconnect the drain line from the turbo just to see if the turbo is sitting full of oil when its turned off. If the level of oil in the hose is higher than the bottom of the turbo it will fill the compressor and turbine housings full of oil when it sits turned off.


    86 325es, 2.8L m50, S476sxe, ProEFI 128 ecu, e85, solid rear axle, TH400 trans, 28x10.5w slicks, zip ties, popsicle sticks, tape
    best time 9.06 @ 151.8 mph, best 60 foot 1.30

  17. #1042
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    I guess ill start pulling lines off and see what I can find. Test the pump and see how much its pulling as well.

  18. #1043
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    This is how bad this thing is smoking. This a cold start when I got home from work:



    And this dip stick tube pumping with car off


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    Last edited by 328iFun; 09-27-2017 at 03:57 PM.

  19. #1044
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    Huh is your ccv clogged?

    Can you feel any pulses out of it?


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    1989 535i - sold
    1999 M3 Tiag/Dove - sold
    1998 M3 Turbo Arctic/black - current
    2004 Built motor TiAg/Black - Sold
    2008 E61 19T Turbo-Wagon - current
    2011 E82 135i - S85 Swap - current
    1998 M3 Cosmos S54 swapped Sedan - current

    1998 Turbo: PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Arp 2k Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, , Poly engine mounts, UUC trans mounts W/ enforcers, 22RPD OBD2 Stock ECU id1700 E85 tune, 22RPD Big power Transmission swap w/ GS6-53

  20. #1045
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    Pump seems to be moving oil to me

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  21. #1046
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    Dont know

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  22. #1047
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    - - - Updated - - -

    Quote Originally Posted by vollosso View Post
    Huh is your ccv clogged?

    Can you feel any pulses out of it?


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    It doesnt appear to be? Not sure how to check if its clogged or not without taking the tube out

    - - - Updated - - -

    Should there be a constant flow of oil out of turbo drain? Because its just spurting out, not flowing
    Last edited by 328iFun; 09-27-2017 at 03:52 PM.

  23. #1048
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    There are pulses in the rubber line before the steel ccv
    vent

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  24. #1049
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    Ccv vent is working and pump is pulling like before.

    Still smoking non stop even when warm all the time

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  25. #1050
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    So I think my draining setup isn't as good as I thought it was. Which doesn't really make sense because as I said it was working fine prior...

    This was a brave feat... I ran the car with no drain connected to the turbo, very briefly and there was no smoke. Let the oil run into a pan.

    Is there a way to tap the pan without removing it? Or should I?
    Last edited by 328iFun; 09-27-2017 at 04:50 PM.

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