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Thread: New-to-me 1992 735iL – the fun begins!

  1. #101
    Join Date
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    11/88 E32 750iL+98 E36M3
    The Mann Filter HU930/3x is for various models and therefore they added into the set some more items to fit all models, you can see that in the application info on the Mann Filter site
    E12 with M30B25 and M30B28 engine
    E28 with M30B25/28/35 and S38B25 engine
    E34 with M30B30/35 and S38B36/38 engine
    E24 with M30B28/30/32/35 and S38B25 engine
    E23 with M30B28/30/32/35 engine
    E32 with M30B30/35 engine
    Alpina B10 E34, B6 E21, B6 E30, B6 E36, B7 E12, B7 E24, B7 E28, B9 E34, B9 E28.

    Same is with their filter kits for the ZF transmissions, many come with 2 ATF pan gaskets, 1 fits for the BMW and the other one I usually scrap.
    Shogun tricks and tips for the E32 series are HERE!

  2. #102
    Join Date
    Nov 2005
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    Quebec Canada
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    92 735iL (12/1991)
    Quote Originally Posted by CroughtonE32 View Post
    I just read over your entire thread here. Has me wondering, did you ever figure out what that loud noise was near the heater
    valve?
    No, and I only heard it once. I think it was just the pump operating normally. The heating and cooling works perfectly inside the car.

  3. #103
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    92 735iL (12/1991)
    I forgot to post that I retrofitted E34 projector headlights successfully into my E32 with freeform lights. The light pattern is much better with a sharper cutoff, which results in more usable light. This is one of those satisfying modifications; quick and cheap (150 USD), plug and play OEM parts, and instant results. Couldn't be happier.

    projectors1.jpg

  4. #104
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    92 735iL (12/1991)
    Since I bought the car the idle hasn't been great. It hunts constantly, revving up and down.

    I was going to order a bunch of vacuum hoses but I followed the advice of a member here who said to diagnose it properly before ordering parts. Wise words!

    Thinking it might be a dirty throttle body I disassembled the intake to find this:

    20190710_085923.jpg

    There is a huge gap where the rubber boot seals with the throttle body!
    (on the picture the boot is upside down, so the gap was on the bottom, not visible without disassembly)
    This lets unmetered air enter the system, so the car has to constantly correct the bad air value with fuel. At least that's what I think, because the gap is after the air flow meter. Makes sense?

    Someone must have forced the boot into the throttle body and crushed it. I'll order a new boot and hopefully it fixes my idle.

  5. #105
    Join Date
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    warwick RI
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    E30/E32/F25
    Look into “HIR” bulbs I had a set in my US headlights before I put in euros. You get a lot more light out put and don’t have to fiddle with led/hid lights and check light issues

    https://legacygt.com/forums/showthre...7814.html?amp;
    Me E30 87/ 325i + F25 12/ M-Sport + E32 94/ 740i

    G/F’s E34 92/ 525iT + F48 18/ X1

  6. #106
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    Great thanks. I didn't know there was a way to get more light output using halogens.

  7. #107
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    Tempe, AZ
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    1995 525i/5
    Now I'm stoked to install the Depo smileys from my E34, the light output on them is actually pretty darn good for standard Halogen bulbs.
    1995 525i 5-speed - Thread

  8. #108
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    Today I adjusted the valves on my M30. Other than a sore back it wasn't too bad.

    I think it was done not too long ago because the clearances were pretty good, I only had to loosen a few valves. No change in noise nor performance.

    The banjo bolts on the oil spray bar were very loose though so I'm glad I caught those on time.

    Oh and I also changed the 3 bulbs in the OBC. Now the lighting is bright and consistent!
    Last edited by Cactuar; 07-20-2019 at 06:00 AM.

  9. #109
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    1989 BMW 535i, 1993 740i
    Quote Originally Posted by Cactuar View Post
    The banjo bolts on the oil spray bar were very loose though so I'm glad I caught those on time.
    Did you loctite them, or use the updated bolts? I believe the updated bolts just have loctite preapplied, they have a circle cut out into the top of the bolt head.
    O o
    ____________________________ ______________
    | BLAAAAAAAAAAAAAAAAAAAHHHHHHHH! !!!!
    \_ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ ŻŻŻŻŻŻŻŻŻŻŻŻŻŻ

  10. #110
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    Good call on checking those oil rail bolts, that's the one thing that'll kill an M30 if left unattended. The OBC is so much more useful with proper bulbs in it, am I right? Being able to see it in the daytime is rad.
    1995 525i 5-speed - Thread

  11. #111
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    11/88 E32 750iL+98 E36M3
    Shogun tricks and tips for the E32 series are HERE!

  12. #112
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    I re-used the original bolts and didn't loctite them, I just snugged them firmly. I read that loctite could potentially gum up the oil passage, and with the ~1000 km's I drive with the car annually, the bolts will hold for a long time.

    Yes the OBC is much more useful when you can read it properly!

  13. #113
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    Quote Originally Posted by Cactuar View Post
    I re-used the original bolts and didn't loctite them, I just snugged them firmly. I read that loctite could potentially gum up the oil passage, and with the ~1000 km's I drive with the car annually, the bolts will hold for a long time.

    Yes the OBC is much more useful when you can read it properly!
    How on earth do you manage to drive the car so little? I put around 2000 miles (~3200 km) on my cars per month on average.
    1995 525i 5-speed - Thread

  14. #114
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    I work from home so I don't have a commute, and we have a family van that takes care of the primary transportation duty.

    The BMW is primarily a hobby car because I wanted to learn and experiment with mechanical repairs (I'm a novice). I also store the car in winter.

    Speaking of which...

    In my quest to fix my wavering idle tonight I inspected the fuel pressure regulator to see if I could spot fuel coming from the vacuum port. There is a smell of fuel inside the hose but I couldn't see fuel coming out of the FPR when the car is running (I did leave it running for a while). So looks like the diaphragm is ok.

    Next I inspected the distributor cap and rotor. The contacts were a bit worn but nothing major so I just cleaned them up. No difference in idle.

    I think I will bite the bullet and get a smoke test done. I already checked many things such as the vac hose from ICV to the intake manifold but I can't check the hoses connected under the intake. A smoke test may reveal something, otherwise I will need to test the original ignition wires to see if they are ok, and look for other items to check.

  15. #115
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    When I open the engine oil cap while the car is idling, the car stumbles and the engine has trouble running, does that mean that the engine holds vacuum ok?

    The same thing happens when I pull the dipstick.

  16. #116
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    Yeah, usually if you notice a big change from either one, that is a good sign as the engine hasn't adjusted to a vacuum leak already. I would still look into the smoke test though. Another easy thing you could do would be to clean/check the ICV. Shake it around and make sure it rattles freely.

  17. #117
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    Yes I already cleaned the ICV and it rattles freely when shaken. Thanks

  18. #118
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    Yesterday I changed the fuel filter on the car. It was still the original BMW filter dated 1991, made in West Germany.

    Pretty easy part swap, just a bit messy. No change in drivability.
    Last edited by Cactuar; 07-22-2019 at 09:58 AM.

  19. #119
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    Today I replaced the two engine mounts.

    I ordered Rein branded engine mounts from Rockauto. The price was fair and apparently Rein sells good mounts for the Porsche 911 so I decided to try them out.

    I really enjoy that they are made in Germany. Furthermore there appears to be a marking that was scrubbed away from the rubber, next to a batch/date code.
    Pretty sure these are OEM mounts or Corteco or some other reputable brand, unbranded and sold in a Rein box. I read that Rein does not manufacture parts but they resell parts from existing manufacturers.

    20190722_171954.jpg
    20190722_172039.jpg
    20190722_172101.jpg

    Anyway the left mount was a real pain to remove because of the black hoses in the way. I didn't want to raise the engine more than I had to but at the end it was so stuck, I had to go for it and raise it at least 3 inches in total. The old mount was covered in grease, it must have ruptured a long time ago. The right side mount was easy, lots of room on that side.

    I'm happy to report that this cured 80% of the vibrations in the car. The car now feels much more refined and quiet, it's great.

    Unfortunately when jacking the engine, the two black adjusters on the throttle and cruise control cables broke. I didn't think to slack those beforehand.
    I had to dial back the adjustment a lot to prevent the car from revving. Looks like I will be ordering new cables next month...

  20. #120
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    11/88 E32 750iL+98 E36M3
    throttle bushing repair
    https://www.bimmerforums.com/forum/s...epair-for-1-72
    or
    E30, E31, E32, E34, E36, E38, & E39 Throttle Cable Bushings (pair) , CNC machined from 6061 aluminum; optional black anodized finish https://www.angryasssolutions.com/parts
    Shogun tricks and tips for the E32 series are HERE!

  21. #121
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    Actually the bushings are not broken. It is the soft sheathing that broke. The sheathing now wants to compress on itself and this will alter the adjustment of the throttle cable I think.

    Here is what I mean. Red is the area where the sheathing is cut in half, and blue is what the sheathing now wants to do.


    Actually if I compress the sheathing against the nut it solves the problem for now.
    Last edited by Cactuar; 07-23-2019 at 08:32 AM.

  22. #122
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    92 735iL (12/1991)
    Here's a video showing the state of the car, one year after I acquired it.



    Is the high-pitched noise on the left side of the engine normal for an M30? It's audible at 1:13 when I open the hood. It comes from the left side of the block and can't be heard as loud on the valve side. Jeff I guess you would know? Did your car sound like this from factory?

    I show the wavering idle in the video, and the vacuum that seems mostly correct.

    I also show the broken throttle cables.

    The new lights, wheels and tires did improve the look dramatically over last year! If only I had time to clean the car...
    Thanks to Dirk also for the great front license plate
    Last edited by Cactuar; 07-25-2019 at 10:43 AM.

    90,700 miles 1992 BMW 735iL Azure Blue Metallic with Silver Grey leather interior ‣My car ‣My YouTube channel

  23. #123
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    Jeff thinks the noise is the sound of the injectors. The guys over on mye28.com say it's not a normal noise and suggested a bad alternator/water pump bearing.

    I removed all three belts and started the car briefly and the noise persists, still high and piercing. I even hear it inside the car slightly when idling.

    I will do an ATF service soon-ish (long overdue) so that might fix it. The car drives well in the meantime.

    90,700 miles 1992 BMW 735iL Azure Blue Metallic with Silver Grey leather interior ‣My car ‣My YouTube channel

  24. #124
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    1990 735I (E32) M30
    I'm not sure what the E28 people are talking about, but I have no doubt the high pitch sound in your video is normal. If you want to feel better and know for sure, go to YouTube. Type in BMW M30. Then listen to every video on YouTube. You'll hear the same noise. My car had that sound when I opened the hood for the first time in Feb of 1990. There isn't a sound I haven't had to correct during the last 30 years. This one is normal. Click on my signature video and you'll hear it. This walk around video was taken right after everything in my engine bay was replaced a few years ago during my motor makeover. Exact same noise before, and after, even after replacing all six injectors as part of my refurb. See here.https://forums.bimmerforums.com/foru...tart-To-Finish

    Jeff
    Last edited by CroughtonE32; 07-30-2019 at 08:11 PM.
    1990 735I (Auto) E32 Feb 1990 to Present
    1996 Z3 Roadster (5 Speed) E36/7 Jan 1999 to Dec 1999
    1983 733I (5 Speed) E23 April 1983 to Feb 1990
    https://www.youtube.com/watch?v=2d4tHoHGaJo
    https://1drv.ms/v/s!Av20xCMMocSsyEpl...h_oOk?e=ekIcAT







  25. #125
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    That's reassuring Jeff I also hear it in your engine video yes. I will put this worry behind me and concentrate on other more productive jobs on the car then!

    90,700 miles 1992 BMW 735iL Azure Blue Metallic with Silver Grey leather interior ‣My car ‣My YouTube channel

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