Diagnose jumped chain and broken chain rail guide - BMW N42/N46 Chain Rail Replacement [PART #1]

Автокөліктер мен көлік құралдары

In this video series I diagnose and repair a broken chain rail guide and jumped chain on a BMW N42/N46 engine in an E46 3 Series car.
PART #1:
0:00 Introduction
2:13 Engine sound and clicking noises after acceleration
3:53 INPA scan & error codes
9:30 Removing valve cover
22:04 Confirming broken chain rail and jumped chain
Engine had reduced power and rattling noises after acceleration. Fuel consumption was also increased.
INPA software showed these error codes:
- 2782 CDKPH - Nockenwellengeber Auslass, Lage der Phasenflanken oder Einbaulage außerhalb Toleranz (2782 Camshaft Sensor Exhaust)
- 27BB CDKANWS Nockenwellensteuerung Auslass-VANOS, Anschlagadaption außerhalb gültigem Bereich (27BB Exhaust Camshaft Control)
INPA analog value 4 also showed that outlet VANOS unit position was incorrect.
I then removed the valve cover and found that top part of the chain rail guide was broken and the chain jumped two teeth on the exhaust camshaft.
This was most probably because of a combination of weak (still original) chain tensioner and old brittle plastic chain rail guide.
I then proceeded with putting the exhaust camshaft back in to correct position so I could lock the camshafts with the locking tools and remove VANOS bolts. That enabled me to remove VANOS units, VANOS solenoids and finally the broken chain rail guide. I also found the plastic guide was broken in two places and managed to get all the broken pieces out of the engine.
Next I installed new chain guide rail and did the timing. I also replaced the brake booster vacuum pump seals in the process.
Then I put everything back together and confirm the repair with scanning the car wit INPA again.
PARTS (required):
- VANOS bolts: 11367500574
- Chain guide rail: 11317512520
- Chain slide rail: 11317505608
PARTS (optional):
- Chain tensioner: 11318685091
- Seal kit for vacuum pump: 11668626471
- VALVETRONIC sensor connector gasket flange: 11377502022
- Valve cover gasket: 11120032224
TOOLS:
- N42/N46 Timing tool kit: cutt.ly/yhVmCJF
DISCLAIMER:
BimmerZen assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. BimmerZen recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of BimmerZen , no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not BimmerZen.

Пікірлер: 21

  • @ahahah445
    @ahahah4452 күн бұрын

    hello bimmer you are the best, im 15 so im pretty new to this but im going to replace my timing chain on my n42 in my 318i, and this series is really going to help me, thanks and cheers

  • @divakism
    @divakism3 жыл бұрын

    Thank you for this video! Really useful and well explained! 🙂 People think those engines are not reliable but this is due to poor maintenance. There are a few things you need to take care of and... Done! Its also cool that you choose the compact version of e46 for your videos. For me, one of the best looking cars out there... Looking forward to Part2! Stay safe and Happy Holidays! 🙂

  • @BimmerZen

    @BimmerZen

    3 жыл бұрын

    100% agree with you. Yea, the E46 Compact has that marmite effect; you love it or you hate it... and I love it:D

  • @samperry9507

    @samperry9507

    2 жыл бұрын

    @@BimmerZen do these bend valves?

  • @BimmerZen

    @BimmerZen

    2 жыл бұрын

    @@samperry9507 I think not: kzread.info/dash/bejne/npqMs6-BiarAfKQ.html

  • @krzysztofplich1223
    @krzysztofplich12233 жыл бұрын

    You are the best .On you tube stars.

  • @dualysmirtin5144
    @dualysmirtin5144 Жыл бұрын

    If the chain Tensioner work under oil presure when the engine is of the chain should be not loose ?

  • @abnanayaw
    @abnanayaw Жыл бұрын

    I have an N52 with a broken guide, can you help

  • @rzmanisco1868
    @rzmanisco1868 Жыл бұрын

    pully pump oil broken.penyebab nya apa

  • @7elliemae
    @7elliemae3 жыл бұрын

    Hi I did my rocker gasket on my 2003 e46 318ci n42, I found a broken chain guide just like the one in your video, I snapped one of the rocker bolts when I replaced the rocker cover, anyway, it drove for for 2 mins and then started to judder like it was miss firing and then the EML came on, I turned around and parked it up on my drive and haven't started it since, would a missing/snapped rocker bolt cause this to happen?

  • @BimmerZen

    @BimmerZen

    3 жыл бұрын

    I dont think broken valve cover bolt is the problem. Did you replace the slide rail? I would first check if everything is properly connected (valvetronic, cam sensors, coils, ccv hose), then i would scan the ecu and get the actual error codes and messages to see what the problem is. If it runns ok for the first few minutes and then stalls, i would suspect something with timing and/or valvetronic activation.

  • @7elliemae

    @7elliemae

    3 жыл бұрын

    @@BimmerZen great thankyou, I had been driving around and not realised the chain guide had snapped, it pulled well and only the rattle on start up was the only give away, when I put it all back together it was then I started to have problems, I scanned for codes and got a p1349 fault, im just worried incase the timings gone that far out that I've bent valves? When I look at the 2 cogs that hold the chain I can see a hole on the front of each of them, the holes where you attached the timing tool, they are at roughly the 5 o'clock posistion, in your video these holes are at the top, im assuming these spin round as the chain moves?

  • @FeeeshEP3
    @FeeeshEP33 жыл бұрын

    My valve cover was so stuck that when I was pulling it off I also damaged the connector plug for the valvetronic as it was on this Ti. Talking about the valvetronic, have you ever diagnosed a faulty electric adjuster motor? My valvetronic has been unplugged for the past 50k km, it runs fine above 3000rpm on the highway this is fine but it’s a bit gutless in the city, so I want to fix it at some point.

  • @BimmerZen

    @BimmerZen

    3 жыл бұрын

    I haven't, but I did look into the whole system when I had a case of a bad valvetronic sensor. If the motor is unplugged, the valvetronic is disabled and the engine is controlled only by auxiliary throttle. That's why the engine is sluggish at low rpms and fuel consumption is a bit bigger. The Valvetronic ECU is quite smart and can detect a whole range of issues: 2850 Variable Valve Gear Guide Sensor 2852 Variable Valve Gear Reference Sensor 2854 Variable Valve Gear Plausibility Sensor 2856 Variable Valve Gear Voltage Supply 2858 Variable Valve Gear Adaptation Function 285A Variable Valve Gear Servomotor Monitoring 285C Variable Valve Gear CAN Communication 285E Variable Valve Gear Control Unit Internal Fault 2860 Variable Valve Gear Servomotor Output Stage 2862 Variable Valve Gear Voltage Supply Power Output Stage 2865 Variable Valve Gear Torque Limitation- Limp Mode 2866 Variable Valve Gear Adaptation Needed 2867 Variable Valve Gear Overload If you scan with INPA you should get some error codes if your motor is bad. You can also measure resistance of the winding to check if it is within spec. I even removed the motor and run it on 12V battery and measured idle current to confirm it's working properly. From the list of errors, you can see that the valvetronic ECU already has open circuit and overload detection...

  • @FeeeshEP3

    @FeeeshEP3

    3 жыл бұрын

    @@BimmerZen Thank you. That was very helpful! I will reset the error codes, plug in the valvetronic again and check for errors after a few drives. Main issue was that the car idled terrible when hot (almost tuning off), this was resolved by pilling the plug on the sensor to disable the system.

  • @clementincarol9969
    @clementincarol99693 жыл бұрын

    How do you know which camshaft is not timed ? Don’t you have to put the engine in tdc ?

  • @BimmerZen

    @BimmerZen

    3 жыл бұрын

    You can determine which camshaft is problematic by trying to insert the locking tools. In my case, I could insert the exhaust camshaft locking tool and the pin on exhaust side on the front locking tool in to the hole in the VANOS timing gear. in this position I could also insert the flywheel locking pin, which means engine is in TDC on the first cylinder.

  • @clementincarol9969

    @clementincarol9969

    3 жыл бұрын

    Ok thank you all lot man

  • @MSH3L-E60

    @MSH3L-E60

    2 жыл бұрын

    @@BimmerZen What should I do if the front side does not match, where did the balance start?

  • @BimmerZen

    @BimmerZen

    2 жыл бұрын

    @@MSH3L-E60 Make sure that the VANOS units are locked in initial position. Lock EXHAUST cam with locking tool at the back (this will stop movement of the chain), then carefully try rotating the INTAKE VANOS bolt counter-clockwise. If the bolt (camshaft) rotates for more than 1deg, then it is not (was not) locked. Do the same for the exhaust camshaft/VANOS, but this time you have to lock the INTAKE cam and rotate the EXHAUST bolt clockwise. VANOS sprocket and the camshaft should feel like they are mechanically connected both times. It you still cant insert the front locking tool, then first undo the vanos bolt one side by locking that cam at the back and then rotate at the crankbolt until you can insert the other cam locking tool and undo that vanos bolt. Do this only if you plan to re-time the engine, of course:)

  • @holybasil155
    @holybasil1553 жыл бұрын

    blue underwear in every clip? XD

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