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Squealing from engine bay - coasting and under load (intermittent)

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  • #31
    Cheers for the kind words JL! I also bought for all the same reasons - and this also was my first Toyota (unless a 1996 Daihatsu Feroza in School counts, but I don't think they owned them then). And yep - everything else about this car is spot on. Which makes it a hard decision.
    You're right - everything on their tech stream was screen-captured as I drove and sent off to 'technical'. They did end up sending a 'tech' down to have a look. And lo and behold! They confirmed it wasn't right. No idea what it was (other than having AN idea of it's rough location) or how to fix it. They have it again next week. Will see after that. I have the change over price on a new car now, so all I can do is see how they go and if it's still rubbish, then it's off. Again, whatever they find I'll put on here and let peeps see the results - as I know I am not the only one. It's also useful to print these pages out and hand them to the mechanics (it is what I did) and it allows them to follow some stuff on here to the tee.
    Wardie - I took your post in and they did everything you suggested, with nil result. He took the front diff apart (he is showing me photo's of all the work he is doing) without result.

    The current "it must be this..." theory is the tension in the springs and/or the gasket itself just forward of the DPF. Now, I struggle with most of this so for everyone's SA it's right in the centre of your car, just forward of the firewall connected, funnily enough, to that exhaust out the back. Just forward of that is a join with a funny gasket thin tensioned by two solid springs. Here's a couple of photo's of the current culprit. But that's not it. He tightened the tension in the springs. And last week replaced the gasket, spring and bolt assembly. No joy. Then added spacers to the new springs. Nup. Don't know what they intend to do next week, but we'll see!

    As an aside, I had my sparky around today doing a whole heap of stuff. He's got a 79 Series, 6 months old. The issues he's had with it (alternator, DPF and Turbo) make my car sound brilliant! So I think I ended up paying $95+GST (yet to get his invoice) for an hours worth of back and forth bleating about Toyota customer care!
    Attached Files

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    • #32
      When they recorded the functions on techstream did they record the drive and "flag" the recording when it happened? if so would they give you a copy of the .TSE file that was generated?
      I found fiddling about with techstream looking at my Prado regenerating that these files can be replayed on any version, you don't need to worry about drivers or even having a connecting lead.
      You can pick whatever parameters you like from the recording and the program makes a graph. It would be interesting to see if any parameters were always the same when the noise (which hopefully has been flagged) happens.
      I am sure it would still be hard to locate the source but this may give you a clue? or do you think Toyota have already done this? I doubt it as nobody seems to use common sense!

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      • #33
        They did record something - the wording used was 'screenshots' were sent to Tech. However both the mechanic and the Tech people stated everything was normal and inside parameters. It didn't matter if the EGR was open/ closed, the DPF was at any particular % or running a regen, for example - we have driven a lot over the past year with the computer hooked up and all these things have been seen.

        I'm about as analogue-guages guy as you can get. The fact the term Techstream has the word Tech in it scares me, let alone the notion of what you've done to your radio system (which I would dearly love to do but just know I'd end up having smoke pouring out of the unit - just like it did when I tried to hook up my last DashCam). I may be heading O/S for 7 months or so shortly, so this may be a blessing in disguise - perhaps I will give it up beforehand and come back and re-evaluate it all. One thing I have noticed is that they seem to have fixed the DPF issue.

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        • #34
          Hi
          Has Toyota fixed it?

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          • #35
            Nope, not yet! It's with head office now, with a full download on anything and everything that has been done to the car since day dot. They're sending that off to Japan. The only thing that has worked to a degree (reduced amount of times it occurs - more weekly now than daily is;

            "LHF drive shaft was removed and greased on contact point to LHF hub assembly. Front prop shaft was regreased."

            So now it's a weekly thing. Unfortunately, when Head office came down last week and had it for three days it didn't occur enough (but it did occur) for them to diagnose it. The question of the Bar, the OME, the ProVent, the Snorkel was also raised as possible contenders (which I guess they are) but there's a lot to suggest otherwise (and they've taken all my points on board).

            I did put it up for sale, for about 24 hours... but took it down pretty quick as I came back after someone called and realised I just cannot part with this thing. In all bar this one issue it's nearly perfect for my needs. So I will persist on getting it fixed, and will let you know what it was! It's about to have a few thousand Vic High Country miles thrown at it next week until late May, so that should bring it all back or lose it altogether. Hopefully the former, I must say, as I want an answer as to what it is...

            Again though - I can't fault the support Toyota are throwing at it. It's just a bloody nuisance with time off work etc...

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            • #36
              Hi Camjam

              Thanks for the update as also have the same problem, I also used about 150-250ml of oil each 1000km
              Kaukapakapa
              Lurker
              Last edited by Kaukapakapa; 03-05-2018, 08:28 AM.

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              • #37
                Hi Camjam

                Have you got the turbo checked?

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                • #38
                  Originally posted by Kaukapakapa View Post
                  Hi Camjam

                  Have you got the turbo checked?
                  Yep. Ripped it out (or they did) - took pretty photo's and all for me. All good there (they;'re taking heaps of photo's to show me - kudos to them as it shows they're backing what they are saying with work). Front diff's been taken apart - all good there. DPF (even after re-install) taken on/ off - all good there (except for the fact it has a DPF). Exhaust taken off and checked - all good. They tested it with, and then for 200km without, the ProVent Catch Can installed - no difference (and they put it back on for me).

                  The latest is 'wait and see'. Next week I'm heading to Victoria for some touring for two months... that's going to either make or break it I think as after the DPF change, when it went quiet for ages - it started up again slowly (like it is now) and then got to unbearable levels. As such, they're suggesting I wait until I come back (6000-odd km's) and they can then either hear it again or not. Problem is, they need the Toyota Head Office dude to hear it now - not just the local Toyota dealer and his manager. Then they can diagnose it and fix/ replace/ tell me it's something after-market that they won't support (I don't care if it is really).

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                  • #39
                    I posted about my 'Squeal' Dec 17 and surprisingly still have the problem. After 40 minutes the squeal is evident but noticed lately with the hot weather in Sydney that it occurs after a few minutes (When really hot).

                    Funny enough I had new Shocks and Springs added front and rear (with a 20cm lift) for a big trip in July (Innamincka, Cordillo Downs, Birdsville, Mt Isa Alice etc) with absolutely no noise occurring.
                    As I mentioned in my earlier post, I had thoughts of suspension/CV causing the problem. Now that the suspension has been bedded in after about 9 months, the squeal has returned....AAAAAAARRRGH!

                    Frustrated is an understatement.

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                    • #40
                      Originally posted by Mav282054 View Post
                      I posted about my 'Squeal' Dec 17 and surprisingly still have the problem. After 40 minutes the squeal is evident but noticed lately with the hot weather in Sydney that it occurs after a few minutes (When really hot).

                      Funny enough I had new Shocks and Springs added front and rear (with a 20cm lift) for a big trip in July (Innamincka, Cordillo Downs, Birdsville, Mt Isa Alice etc) with absolutely no noise occurring.
                      As I mentioned in my earlier post, I had thoughts of suspension/CV causing the problem. Now that the suspension has been bedded in after about 9 months, the squeal has returned....AAAAAAARRRGH!

                      Frustrated is an understatement.
                      Yep. This was the problem that tipped me over the edge and I got rid of the car. DPF issues aside, drive shaft issues aside, ECU updates aside - this was the problem that had me missing so much work it had to go. On it's own, I'd have stuck with it. But Head Office started to find it too hard and began questioning the add-ons I had (minimal - listed above) as NO ONE else in Australia seemed to have this problem (they said the exact same with my white smoke/ DPF in mid-2016 when I raised the issue then). That DPF issue still is not fixed for Toyota, and with this squealing and the duck-shoving that Toyota started to play... Nup.

                      I do hope you get to the bottom of it. What I did buy (but they arrived from the US after I sold it) was some Steelman CHASSISears from the US. Here, there over $1000, but I managed to get them for around half that. New car, and after 30,000km, they sit unopened as I have never had the problem in the new petrol 4wd I have.

                      I say that - as if it's going to drive you nuts, it may be worth a go. And yes - exactly as you say - it appears far more in summer, then far less in winter (here in Canberra), so ambient temperature has something to do with it. I would say you didn't hear much outback due to the fact it's something likely to be loose - does yours disappear for a bit when going over a bump or similar? Mine did. So on dirt roads you'd not hear it.

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                      • #41
                        Originally posted by CamJam View Post


                        I say that - as if it's going to drive you nuts, it may be worth a go. And yes - exactly as you say - it appears far more in summer, then far less in winter (here in Canberra), so ambient temperature has something to do with it. I would say you didn't hear much outback due to the fact it's something likely to be loose - does yours disappear for a bit when going over a bump or similar? Mine did. So on dirt roads you'd not hear it.
                        Glad to see that I am not alone with this problem. Yes it does disappear over bumps and in/out over slightly less flat bitumen. I love the capability of the Prado which I would be loath to get rid of it. I'll hang in for a while longer to see if there is a cure.

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                        • #42
                          Originally posted by Mav282054 View Post

                          Glad to see that I am not alone with this problem. Yes it does disappear over bumps and in/out over slightly less flat bitumen. I love the capability of the Prado which I would be loath to get rid of it. I'll hang in for a while longer to see if there is a cure.
                          Genuinely - good luck! It was the last straw for me (after DPFs and driveshaft replacements), but it wasn't for the dealer's lack of trying. Definitely worth the ChassisEars if it continues much longer. I've got a set going cheap in Canberra What I can say is that Canberra Toyota took the turbo apart (showed photo's) and it wasn't that. It did disappear each time they replaced the DPF, so again something points to that area.

                          Comment


                          • #43
                            Originally posted by CamJam View Post

                            ........Definitely worth the ChassisEars if it continues much longer. I've got a set going cheap in Canberra What I can say is that Canberra Toyota took the turbo apart (showed photo's) and it wasn't that. It did disappear each time they replaced the DPF, so again something points to that area.
                            The car is due for service next week (an oil leak around the Ctr Diff is evident) and after a chat with the mechanic, I might take you up on the ClassicEars.

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                            • #44
                              My 150 started to have squeal around 45000kms. Didn't think much about it and as I bought the car second hand at 38000kms and being an auto, I thought that the brakes were just due a bit early. Bought new pads in advance to swap them out on a weekend, no big deal. Well the pads were only just over half worn, but for some reason I thought I might as well swap them out. The squeal squeal disappeared. Then at around 80000kms a squeal reappeared, I thought very similar. Assuming it could only be one brake I got a passenger to to listen on passenger side and i did on the drivers side. It was really hard to agree on a direction, too loud and not at an ideal pitch. It only did it sometimes, but when it did it was quite bad. Change the accelerator slightly it would go, then on the next bend in the road re-appear. With a bump in the road it would stop, then start again. Would never do it on full acceleration, but mostly at speeds between 50 and 80km/hr. I measured the brake disk temperatures after a drive and I saw no abnormality. Applying the brakes would not stop the squeal, sometimes the squeal would only stop when car came to a full stop. It was impossible to locate, first consensus rear left. So checked it all, cleaned it and squeal was gone, but not for long. Then front left checked and cleaned, squealing gone but not for long, Well you can guess I did all wheels. No change, it drove me insane with everything squealing, so it feels, all people looking at you on the road, so it feels Observation was usually it would start intermittently around 10 to 20 minutes into a drive then getting progressively worse. May be with warmer temperatures sooner, Never had it going to work in the morning, but most times going home. Going at a 100km/hr it would stop, not so much of an issue on touring trips. The common in all this is that the pads were again just half worn again. I actually did keep driving because I didn't have the time to take off the rotors and get them machined as something else I could try, but surfaces didn't really look that glazed. There wasn't any wheel bearing play and no hub did show an unusual temp development. Then driving on, 5000km later the squealing is all gone, haven't heard it for ages. Nothing showed up, nothing broke in my case, no fan belt issue, no alternator clutch pulley issue. I'm now speculating that it is perhaps a resonance situation with half worn brake pads, just having the right mass at that wear level. Now that they are light in my case they perhaps don't resonate anymore, just like is the case when they are too heavy when new, just off tune. I haven't got an opportunity to check third time round for a while as a will wear those pads out till they actually need replacing. My experience might not apply to your situation but may be worth a thought, check and discussion.

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                              • #45
                                Gresemonkey

                                Have you put it into neutral why you are driving with Squeeze?

                                I have Toyota New Zealand work on my and noise goes away then in neutral and comes back wen up put back drive

                                my no longer make noise after a lot of hard towing 2000-2500kg for about 15,000 km on and off

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