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Thread: New Owner 1981 320i

  1. #76
    Join Date
    Mar 2017
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    1981 bmw 320i
    Quote Originally Posted by SilverPuddle View Post
    Nice build and pictures to capture your work. Do the wires unplug for the connector and you just slipped on a new boot...looks good.
    Thanks much appreciated.
    Yeah you just need a tiny flat head like for glasses.
    There is a square hole on the inside you poke it through that depresses the lock tab on the terminal.
    It will just pull out after being depressed.

    I can post a some pictures later of the process. Super easy on these types of connectors to do.

  2. #77
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    1981 bmw 320i
    I bought a new dipstick tube for the car but it is definitely to long.
    Looking at my old one and it looks like it was cut at some point in its life.
    Is this normal to have to do?




    Ok so i was just looking at it again.
    I order the number 9 guide tube.
    I guess that suppose to replace the the other dipstick tube setup?
    I will probably cut it tomorrow as i don't see really any other way.


    https://www.realoem.com/bmw/enUS/sho...diagId=11_0500
    Last edited by osburn383; 06-20-2017 at 07:47 PM.

  3. #78
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    Mar 2017
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    1981 bmw 320i
    I hunted for a while to find a suitable replacement to the $8 BMW banjo bolts for the fuel distributor.
    These from here did the trick at $2.14 a piece.

    http://www.mk1autohaus.com/Fuel-Banj...se_p_7142.html
    They are identical in inside diameter and the 3 pass through holes.
    The only difference is the head is a little thinner and uses a 12mm wrench instead of a 13mm.
    This will work in all the 8mm banjo bolt spots. There are 8 total on the distributor.


  4. #79
    Join Date
    Jun 2016
    Location
    Austin, TX
    Posts
    1,585
    My Cars
    1978 323i
    I wonder if you would receive a longer dipstick if you ordered one of those too?

    Also, I have gotten fuel injection tubing, banjo bolts, copper seal rings etc from special t automotive
    (now called Delorean Auto Parts) here https://www.deloreanautoparts.com/de...injection.html
    Last edited by cgifool; 06-20-2017 at 09:14 PM.

  5. #80
    Join Date
    Mar 2013
    Location
    Santa Rosa, CA
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    1,631
    My Cars
    1981 320i silver
    If you keep the same dipstick, and use the new tube, then the distance from the top of the tube to where it enters the block should be made to be the same. That is measuring the length of the "guide tube" along it's curve, from top of tube to where it enter the block is what you want to be the same.

    Alternatively if you have the pan off you can measure all those things. If the pan is off, use the old "guide tube" with the dipstick in. Measure vertically from the gasket surface on the bottom of the block and get the distances to the MIN and MAX marks on the dipstick. And you can also measure distance to the bottom of the oil pump intake and to the bottom of the oil pan so you can diagram how all those relate. Then switch to the new guide tube and make sure the MAX and Min marks are the same distance from the bottom gasket surface of the block.

  6. #81
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    1981 320i silver
    Can it be used without cutting it?

  7. #82
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    Mar 2017
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    1981 bmw 320i
    Yeah i just marked it the same as the old one, cut it down, and it works now.

    So i undid the vent line on the back of my accumulator and plugged the hose.
    Then jumped the the fuel pump and gas gushed out the barb on the back of the accumulator.
    Pretty sure its bad lol.
    Last edited by osburn383; 06-22-2017 at 11:11 PM.

  8. #83
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    1981 bmw 320i
    Ok so I got a new accumulator put on.
    Started much easier.
    But wouldn't hold a idle easily.
    I readjusted my idle air and air flow mixture.
    Was a little better.

    I went and hooked up my gauge to check fuel pressure.
    Forgot to check cold control system.
    Warm control was 48psi.
    System is 67psi.
    Holds over 30psi for 20min.
    Will test cold control in the morning and how it starts cold.

    It revs nicely once running. It idles decently once started.
    I have it set a little high as it makes it easier to keep running. 1.1k rpm idle.
    Just having a hard time getting it to idle without pressing the gas several times while cranking.
    I messed with the airflow sensor screw to lean out and then enrichen it.
    It sometimes wants to stay running but it mostly just falls to low in the rpms, then stumbles and dies while not giving it any gas pedal.

    If i pull the oil cap off it dies like it's suppose to.
    I have all new hoses and they all have clamps.

    Any suggestions on what to check or adjust?

  9. #84
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    Jun 2017
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    Los Angeles, CA
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    My Cars
    BMW M3
    You're making good progress so far

  10. #85
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    Mar 2017
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    1981 bmw 320i
    Ok, sooo I figured out my issue......
    Forgot to fully tighten the valve cover after doing a valve lash....
    Starts up and idles just fine now.

    My idle air valve seems to be dead though.
    It is fully closed when cold or hot.
    Already tried cleaning it and moving the slide valve but to no avail.

    Going to try and find a good used one hopefully.
    Last edited by osburn383; 06-28-2017 at 11:41 PM.

  11. #86
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    1981 bmw 320i
    Got almost all the kinks worked out on the car.
    Need to place an order for a new idle air valve tonight.


    Picked up a r134a retrofit valve kit so i could hook the gauges up.
    Rented the pump and gauges from autozone.


    Decided to try and vac down my ac system to see if it will hold a vacuum.
    It didn't at first....


    I went and tightened every connection point and tried again.
    It held a almost perfect vacuum at 29in hg for over an hour.
    Going to try and find some r12 to try and recharge it.



  12. #87
    Join Date
    Dec 2016
    Location
    Atlanta Ga
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    My Cars
    98 M3 Sedan, 82 320i
    R12 is the way to go for sure. Got my Ac going recently, I used a can a 12oz can of R12 and it works perfect. I guess I lucked out it has been working since May the only thing is it only works on high fan. The resistors are open in the ac unit for low speed but in Atlanta high speed fan is necessary i"ll get around to it in the fall.

  13. #88
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    1979 E21 320i
    Since you haven't charged it yet, I'd take it one step further and put nylog on the system to seal it. Goes on the threads and seals
    -John

  14. #89
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    1981 bmw 320i
    Ok i will look into that stuff never heard of it.
    I did crack open a fitting to see if it has o-ring or flared ends.
    Was o-rings so i will replace those along with the drier.

  15. #90
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    Mar 2017
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    1981 bmw 320i
    Having a odd slight missfire issue.
    Was running pretty solid for about a week.

    Starts pretty easily.
    After warm idle is a touch rough as it does very small miss sounds.
    It revs freely though.
    Readjusted the air fuel.
    It was coming down to idle and missing, then would drop lower and lower in the rpm till it would shut off.

    I have a new idle air valve coming today i will put on as i have the idle set high for now.
    My fuel pump is making lots of buzzing cavitation type noise.
    I'm guessing i need to replace the fuel supply hose to it?

  16. #91
    Join Date
    Apr 2005
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    Corona California
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    79 320/6 81320i 65malibu
    osburn383 love your work and attention to detail!!

    Love how you are leaving no rock unturned, especially with the wiring. Most owners want to start replacing big parts first - but they are all controlled through 34 year old or older wiring and connectors. So even new parts will not work if they do not receive the correct impulse to turn them on or off.

    Thanks again for all the data and write up!

    Always FUN TO DRIVE - Build Thread & Tech info - 79 320/6 track car build thread -- Videos of track car -Adam in car Auto-x video - Start-up video - 4/2011 Adam's TOP BMW time San Diego BMWCCA - 4-5-15 Dyno break-in run new M20B25 - Exhaust Thread - Link

  17. #92
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    Quote Originally Posted by OLD MAN View Post
    osburn383 love your work and attention to detail!!

    Love how you are leaving no rock unturned, especially with the wiring. Most owners want to start replacing big parts first - but they are all controlled through 34 year old or older wiring and connectors. So even new parts will not work if they do not receive the correct impulse to turn them on or off.

    Thanks again for all the data and write up!
    Thanks! Yeah always easier to diagnose with known working systems. Learned that the hard way over the years.
    Wish i had more time to clean paint a few more things.
    Hopefully after i get my other car running properly again.


    OK so i tested the coil.
    It has .7 ohm on the primary and 4.2k ohm on the secondary.
    The secondary is to low so the coil is going bad i assume?

    Going to try and order a new one today.
    Was looking at the red vs the msd both seem about the same just a matter of which i can get cheaper.
    Going to pick up a set up Ireland Engineering wires along with early style cap and rotor.
    Plus some spark plugs to match.

  18. #93
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    1981 bmw 320i
    Update on the car
    Got a lot done over the weekend.

    Decided the tank needed a flush and the found the in tank pump dead.
    I disconnected the inlet on the fuel filter and shoved and old rad hose over the line to use the pump to drain the gas tanks.
    Worked rather well.





    Tanks were pretty dirty.
    Had apparently sat at some point with about 3/4th a tank causing some rust to develop.
    Mostly light surface rust though.






    Cleaned the outside.
    I cleaned inside of the tank with a water hose and then put a couple of gallons of diluted phosphoric acid.
    Tossed in a handful of old nuts to loosen any particles.
    Let it sit for a 6 hours with shaking the nuts around every other hour.
    Mostly soaked the top side as that is where the rust was.
    Cleaned up nicely. Flushed with water and then gas.





    What the in tank pump looked like.

    Bought a Volvo in tank pump and made it fit the hanger fairly easily.
    Thought in took a picture but looks like i didn't.





    Decided to see what the inside of the old pump looked like.
    Completely rusted out.
    Car still ran ok with it like this somehow.





    Ordered a ton of hose and lots of hose clamps.
    Should have ordered more small ones actually ran out.
    Ordering the clamps from mcmaster is the way to go on this.
    Comes in bags of ten. Better than OE. As the screw is stainless unlike BMW clamps.





    Only shot i remembered to take.
    Used this thread as a rough guide.
    Had to get one more foot of 1/2" as 6' wasn't enough.
    https://www.bimmerforums.com/forum/s...lacement-guide






    Also replaced the rotor and cap with a early model.
    New MSD coil and Ireland wires with NGK g-power plugs.





    Tweaked the air fuel mixture.
    Man i runs so smooth now.
    The ignition parts fixed the skip.
    The fuel lines and pump fixed the air cavitation sound the external was making.
    Was a long weekend but well worth it.
    Last edited by osburn383; 07-18-2017 at 01:31 AM.

  19. #94
    Join Date
    May 2005
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    Red White and Blue
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    82 E21
    osburn383 - Quick question on your fuel tank hose renewal.

    I see you had to remove the hose from the in-tank pump to the external pump - I believe this is p/n: 16121118886 which has a threaded end and a banjo end. Did you replace the metal slip ring that fits on the metal line at the threaded end and if so where were you able to find the right part? Should be p/n: 07119970111.

    I have been able to source all of the hoses, etc. except for the slip ring which is NLA from the dealer. My luck is that I break this fitting loose and it will leak for eternity.

    Thanks...

    MJ

  20. #95
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    1981 bmw 320i
    No i reused the original just inspected for any scarring and tightened it up a little more than normal.
    No leaks when the car is running.

    Did a quick search.
    This looks like what your looking for from the picture on your thread.
    This place is a great source for metric parts.
    https://www.belmetric.com/8mm-outer-...u87r2sh8kilia6




    Quote Originally Posted by mjweimer View Post
    osburn383 - Quick question on your fuel tank hose renewal.

    I see you had to remove the hose from the in-tank pump to the external pump - I believe this is p/n: 16121118886 which has a threaded end and a banjo end. Did you replace the metal slip ring that fits on the metal line at the threaded end and if so where were you able to find the right part? Should be p/n: 07119970111.

    I have been able to source all of the hoses, etc. except for the slip ring which is NLA from the dealer. My luck is that I break this fitting loose and it will leak for eternity.

    Thanks...

    MJ
    Last edited by osburn383; 07-18-2017 at 03:56 PM.

  21. #96
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    May 2005
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    Red White and Blue
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    82 E21
    osburn383 - thank you for the reply.

    I never came across that fitting at belmetric during my prior search but it does indeed look promising. I am encouraged to hear that your line did not leak when reinstalled and maybe I should not be so concerned.

    Tank lines are next on the list so we will soon see how lucky I am....


    MJ

  22. #97
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    E30S62, E21S54, E31S85
    Looks like a cool restore build! Youlll like the 5 speed way better. Still revs very high on the hwy because of that 4.10 in the back


    Sent from my iPhone using Tapatalk Pro
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  23. #98
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    Thanks! Yeah its been nice to drive to work in it without having any odd engine issues after all that work.
    Just needs new shocks and springs to reduce the boaty feel and should be great driver.

    I need to see if there is a way to better asses the condition of that trans before i make the swap.
    I goes into all the gears easily.
    Couldn't find anything about if there is a way to check shaft end play.
    Going to try and rig something up to spin it at a moderate speed to listen to the bearings.


    Quote Originally Posted by M3fan4eva View Post
    Looks like a cool restore build! Youlll like the 5 speed way better. Still revs very high on the hwy because of that 4.10 in the back


    Sent from my iPhone using Tapatalk Pro

  24. #99
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    1981 bmw 320i
    Ok so i went and replaced all the orings on the AC system expect for the expansion valve. I used the nylog sealant as well. Thanks for that.
    Pulled a vacuum for 45min and let it sit over night with no drop in vacuum.
    Put one can in but the compressor didn't cycle.
    So i jumped the clutch on off to cycle the compressor.
    Need to look up how this system cycles the compressor clutch and fan as both do nothing at the moment.

  25. #100
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    1979 E21 320i
    There's a mechanical temperature switch that runs to the evaporator in the center console, my money would be starting there. If the wire isn't receiving the 12 volts, also double check that it's the correct wire. When I pulled an archaic alarm system I accidentally mistook one black wire for that one. Checking is easy, if you turn the ac switch on it should read 12 volts at startup. It's a thin 16 ga black wire coming out of the passenger side firewall on mine. They were all dealer installed though, so your mileage may vary.
    -John

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