FA20 & FB Engine Fatal Flaw and How To Fix It (Long Version w/ Instructions)

แชร์
ฝัง
  • เผยแพร่เมื่อ 27 ธ.ค. 2024

ความคิดเห็น • 39

  • @2003wrx64
    @2003wrx64 4 ปีที่แล้ว +5

    Thanks for this! Just finished a rebuild on a 2013 BRZ and have some valve noise on the driver's side. This technique will be a tremendous time saver!!!

    • @DenstojAutoCentreCarrington
      @DenstojAutoCentreCarrington  3 ปีที่แล้ว +1

      Wicked! I hope you had a chance to fix it and install the retainers while you had the engine out? It would suck for a rocker to fail on a brand new engine build!

    • @cleo7893
      @cleo7893 3 ปีที่แล้ว

      i also hv the same issue!can i know what i hv to replace?

    • @2003wrx64
      @2003wrx64 3 ปีที่แล้ว

      @@cleo7893 in my case the issue was that the small rectangular piece from the back of the original cam sprocket had come loose from the sprocket (that's the initial failure causing the CEL) and was stuck to the mounting face of the camshaft. I didn't notice it and installed the new sprocket over it. New sprocket being mounted slightly askew caused a loss of oil pressure at the sprocket and the rattling sound after warm-up.

    • @vhonborbon986
      @vhonborbon986 ปีที่แล้ว

      Aye man im having the same issue after i forged built my engine

  • @brendanscontraptions3176
    @brendanscontraptions3176 ปีที่แล้ว +2

    I own 2012 Forester with an FB25 that has a top end knock. It has the same style valve train as the one in your video. In your experience, where does the knocking come from? It’s not a tick, but a distinct knock. I’ve had the engine out twice, and really don’t want to remove it again until I know what the repair is.

  • @resuort
    @resuort 3 ปีที่แล้ว +4

    Wish you did a full install video as well. This is ALOT more difficult on the intake cams.

    • @DenstojAutoCentreCarrington
      @DenstojAutoCentreCarrington  3 ปีที่แล้ว +2

      It's definitely trickier on the intake cams. Recording a video of a full install starting from engine out is definitely on our videos to make list. Feel free to ask any questions you have and I'll do my best to help out.

    • @resuort
      @resuort 3 ปีที่แล้ว +2

      I ended up figuring out the intake cams side and getting done. It took me 4 hours to figure out both intake and exhaust on on side. The other side I was able to get it done 1.5hr.

    • @DenstojAutoCentreCarrington
      @DenstojAutoCentreCarrington  3 ปีที่แล้ว +1

      @@resuort Well done, glad you figured it out.

    • @resuort
      @resuort 3 ปีที่แล้ว +3

      @@DenstojAutoCentreCarrington I'm glad too! If I hadn't bought the super long skinny flat head screwdriver I would have been.... screwed! LOL. Otherwise I would have has to take off the whole timing just to get to it.
      Tip for readers: that little bucket at the top of the valve, if you dip that in oil then put it back on it will prevent it from sliding off again. Even with the best of intention they can really pop out, put a shop rag over the cams to prevent it from flying across the room when you remove the roller rocker.
      The intake roller rockers are easy to install if you put it right up to the cam and push down on the valve spring by thumb. The exhaust cam install is exactly as shown in video.
      Be sure to have thin long reach needlenose pliers. And a powerful mini magnet on a rod. And remove the spark plug seals.
      Honestly took me 6 hours total, but that was including an hour lunch break.

    • @DenstojAutoCentreCarrington
      @DenstojAutoCentreCarrington  3 ปีที่แล้ว

      @@resuort Neat little write up Ibrahim! The job can be a little tricky and time consuming but it becomes easier after installing the 2nd or 3rd clip.
      The oil drain ports need to be plugged up with paper and take extreme care not to dislodge the valve retainer collets.
      1st - Check all valve clearances and write them down.
      2nd - Fit bespoke pivot without the retainer clip. Check valve clearance and correct if required.
      3rd - Last step is to fit retainer clip to rocker .
      I suggest doing one valve at a time.

  • @MrThunderkat69
    @MrThunderkat69 ปีที่แล้ว

    does this apply to the 2015+ wrx with the fa20 engine as well?

  • @hadgibbons
    @hadgibbons 3 ปีที่แล้ว +1

    How do you adjust the valves on these type of engines? I took my heads to a machine shop and they weren't able to adjust them correctly so now I have to do it myself, unfortunate but anything helps since there aren't a lot of videos over this engine.

    • @brendanscontraptions3176
      @brendanscontraptions3176 ปีที่แล้ว

      Not sure if anyone has answered this yet, but the piece that he pulls off 3:05 is basically a shim. They’re used by the factory to get the lash to the correct tolerance. There’s different thicknesses available to achieve this

  • @Peemanhermit
    @Peemanhermit ปีที่แล้ว

    Should i do this or replace valve springs? Which way is best?

  • @brandonfuster5520
    @brandonfuster5520 3 ปีที่แล้ว +1

    i would like some advice for my scion frs build can ask you guys for advice

  • @erllnutz2405
    @erllnutz2405 ปีที่แล้ว +2

    All FB/FA engines will spit out the rockers at high RPM if the valve clearance is beyond the middle of the factory spec. If you want a high-revving FB/FA, your valve clearance spec should be closer to factory minimum spec. You won't float valves until well beyond redline

  • @bradgreen987
    @bradgreen987 ปีที่แล้ว

    Where are the buckets? Rocker arms, is this the 70's? My '16 wrx completely different

  • @houhou9716
    @houhou9716 3 ปีที่แล้ว +2

    Hi, I'm in Australia how much is it gonna cost for you guys to install these retainers? Taking out an engine seems a bit hard for a garage mechanic lol

    • @DenstojAutoCentreCarrington
      @DenstojAutoCentreCarrington  3 ปีที่แล้ว

      Hey, @HOU HOU it's possible to do yourself but there are a few critical things to check in the process. If you would rather us install our Rocker Retainer Kit for you, we'd love to do it.
      A ballpark quote is $2,700 AUD for a drive-in, drive-out installation.
      For details, please see: denstoj.com.au/pages/install-fa-fb-denstoj-rocker-retainer-kit-in-toyota-86-subaru-brz
      Feel free to *call on 02 4962 2008* or email dennis@denstoj.com.au to book it in. We're based in Newcastle. What about you?

    • @houhou9716
      @houhou9716 3 ปีที่แล้ว

      @@DenstojAutoCentreCarrington Thank you for your reply. I'm in the ACT and I might call you guys when the lockdown eases.

    • @houhou9716
      @houhou9716 3 ปีที่แล้ว

      @@DenstojAutoCentreCarrington Another question, u guys have had these retainers for a year or two now. Are there any reports or feedbacks on the longevity of these retainers?

    • @DenstojAutoCentreCarrington
      @DenstojAutoCentreCarrington  3 ปีที่แล้ว

      @@houhou9716 No worries, I’ll keep a lookout for your call.

    • @DenstojAutoCentreCarrington
      @DenstojAutoCentreCarrington  3 ปีที่แล้ว

      @@houhou9716 On all of the vehicles that we’ve installed our Rocker Retainer Kit on we’ve had no issues. This has been on 86s that are daily driven to track cars competing in the Toyota 86 race series.
      The only issue that has occurred was on a vehicle in the States (we didn't install) where the clips had worn against the machined shoulder on the pivot due to incorrect installation of the clips.
      Full details are on rixter145’s post: www.ft86club.com/forums/showthread.php?t=142047&page=7
      Since this issue, we’ve improved the design to a custom pivot that removes the shoulder and explained how to install the clip properly in this video: th-cam.com/video/QJSK6_t8h4Y/w-d-xo.html

  • @mathewross3398
    @mathewross3398 4 ปีที่แล้ว +1

    great work, ill be ordering soon! sooo where will the motor break next if you over rev it? asking for a friend haha

    • @DenstojAutoCentreCarrington
      @DenstojAutoCentreCarrington  4 ปีที่แล้ว

      Hey Matt, thanks glad we could (potentially) help you out! Tell your friend that the next weakest link would be the connecting rod. However, if your FA20 is still naturally aspirated then it is unlikely.

  • @NickBEADG
    @NickBEADG 3 ปีที่แล้ว +2

    It looks a glorified panel clip. That’s gonna last a long time?

  • @diesel66pe32
    @diesel66pe32 2 ปีที่แล้ว +1

    just got one for cheap with this issue, rocker got stuck and bent a cam, broke the timing chain, and bent 2 valves.

    • @DenstojAutoCentreCarrington
      @DenstojAutoCentreCarrington  2 ปีที่แล้ว

      @diesel66 pe bugger but I guess you must have got a good deal on it? It' s been a while now so guessing you've fixed it up?

  • @cristianfernandez6028
    @cristianfernandez6028 2 ปีที่แล้ว +1

    Cheers where can i get those clips?

    • @DenstojAutoCentreCarrington
      @DenstojAutoCentreCarrington  2 ปีที่แล้ว

      Hi Cristian, the pivots must be changed from OEM so that the clip can attach. You can purchase our kit here: denstoj.com.au/products/fa20-fb-rocker-retainer-kit

  • @clementlee22
    @clementlee22 4 ปีที่แล้ว +1

    Will these be able to handle forced inducted FA20's?

    • @DenstojAutoCentreCarrington
      @DenstojAutoCentreCarrington  4 ปีที่แล้ว

      Yes, these are a must on all FA20 and FB engines across naturally aspirated and boosted either turbocharged or supercharged.

  • @georgeEPC
    @georgeEPC 2 ปีที่แล้ว

    If this was truly a problem I would have though there would be dead engines up and down the street and that's not the case

  • @alexanderkillips3121
    @alexanderkillips3121 2 ปีที่แล้ว

    RTV those suckers and call it a day 😂

  • @manhoot
    @manhoot ปีที่แล้ว

    Isn't she a beaut

  • @Ferretts89
    @Ferretts89 2 ปีที่แล้ว

    i wonder if he will be able to do all this from his Austrailian concentration camp?