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  • #46
    Originally posted by azzss View Post
    I thought mine was bad!!!!, i got to 260ks before it cracked 2 pistons (were original injectors) but was still going just rattle when cold and over fuelling with new injectors. I got mine fully rebuilt, inc new head, radiator and all hoses, only thing went back in were the injectors (were new) and the turbo was fine. Cost $7,500 drive in drive out. I didn't think that was too bad.
    Ok, so now I'm refresh with this one, the way I understand this, it's still running, new Injectors at 260k.
    But rattling & was cracked pistons. So ended up in a rebuild.

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    • #47
      Yeah mate, was running fine, changed injectors out at 260k's, straight away picked up a bad cold rattle, ended up having 2 cracked pistons, full rebuild, except turbo, got 375k on it now, uses a little oil, but running well.
      2016 1GD GXL 6 speed auto, ARB colour coded summit bar, LED driving lights, duel batteries, BF Goodrich tyres, window tint.

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      • #48
        Originally posted by azzss View Post
        Yeah mate, was running fine, changed injectors out at 260k's, straight away picked up a bad cold rattle, ended up having 2 cracked pistons, full rebuild, except turbo, got 375k on it now, uses a little oil, but running well.
        Good to see your still browsing pp & vehicle is still going well.

        What other work/maintenance have you had to do? Bearings? Etc?

        Comment


        • #49
          Only for the cracked pistons, and we all know why that happens now, its been bulletproof!, had a clutch in it at 90,000kms, springs and shocks at 300k, only just put new brake pads and rotors in it at 340k, they were originals!!!!!!! Gearbox, diffs, wheel bearings etc all original. Honestly best vehicle I've had, its awesome :-)
          2016 1GD GXL 6 speed auto, ARB colour coded summit bar, LED driving lights, duel batteries, BF Goodrich tyres, window tint.

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          • #50
            Originally posted by azzss View Post
            had a clutch in it at 90,000kms
            Azzss, was the original clutch completely stuffed? This seems very early to be changing it out, but in saying that, I'm about to pick up a new camper trailer, and paranoid about my clutch too (only got 95,000km on the clock).
            2009 White KDJ120R Manual fitted out for family camping and touring - See my Rig Build at [url]http://www.pradopoint.com/showthread.php?27887-Smithy-s-Rig-Build[/url]

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            • #51
              Originally posted by Smithy - 120 D4D View Post
              Azzss, was the original clutch completely stuffed? This seems very early to be changing it out, but in saying that, I'm about to pick up a new camper trailer, and paranoid about my clutch too (only got 95,000km on the clock).
              It had a shutter in it when i bought it Smithy, and i rang the dealership about it, and they agreed to supply a clutch kit if i fitted it (was a days drive from me). The fly wheel had some hot spots in it, but the clutch itself was still ok. Cheers
              2016 1GD GXL 6 speed auto, ARB colour coded summit bar, LED driving lights, duel batteries, BF Goodrich tyres, window tint.

              Comment


              • #52
                My 2010 diesel just failed at 212,000 km. Without taking off the head, 3 mechanics have said, " injector failed, cracked piston ". An obvious type failure and reason for recall. Estimate $12000, minimum to repair.
                Silver 150 D4D GXL Auto, ARB Steel Winch Bar, Tigerz11 12000 lb Winch, Duall Batteries, IPF 900 Extreme Driving Lights, Wetseat Seat Covers, Rhino Roof Rack, Safari Snorkel, Ironman Awning, Ironman 2" lift, foam cell shocks, Polyair bags, Bridgestone Dueller 694s, DRIFTA drawers with drop down fridge slide and Waeco 80L.

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                • #53
                  Originally posted by appoppo View Post
                  My 2010 diesel just failed at 212,000 km. Without taking off the head, 3 mechanics have said, " injector failed, cracked piston ". An obvious type failure and reason for recall. Estimate $12000, minimum to repair.
                  Just find a decent mechanic to rebuild yr current engine, far cheaper option and if they're good will also fit upgraded pistons which are now available

                  But cant remember who sold them was a mob over eastern states somewhere

                  Comment


                  • #54
                    Joined the cracked piston club at 180k. Coming back from up north towing a camper under a bit of load when it went bang in the middle of nowhere, lucky to be able to limp to a roadhouse 3km down the road.

                    Had just replaced the injectors 5000km prior. After spending a lot of time researching while getting back to Perth it's pretty clear that the primary problem is with the piston design. I have done a fair bit of hard long distance towing a couple of times a year so the engine has done some hard work over the past 10 years, often in quite hot conditions.

                    The injectors play a part, but aren't the major cause. My take away is that there are a lot of pseudo experts on the net who don't really understand the science of what is going on, and a few knowledgeable experts that have properly diagnosed the problem. I would probably still have changed the injectors, but they don't fix the underlying problem of piston design. Bottom line is that the piston struggles with the thermal load from sustained heavy load and slowly fatigues and then eventually cracks.

                    Interesting that the EGR port runs in the head around the number 1 piston adding a lot of extra heat and that is a common failed piston. This guy is one of the few that seems to actually bring a bit of objective knowledge to the subject https://www.youtube.com/watch?v=dOQHwlt7698.

                    ​​​​​​​Luckily have sourced a new genuine Toyota motor and turbo fully installed for around 14k. The tow cost a fortune and a bit pissed at having an almost brand new set of genuine Denso injectors that I can't do anything with because the new engine comes with injectors (and turbo). I will invest in a Scangauge to monitor EGT in future and probably be a bit more reserved when towing.

                    ​​​​​​​On the plus side I didn't land on my roof like a guy we passed in the tow truck just down the load, who rolled his 4WD and boat.
                    krypto
                    Avid PP Poster!
                    Last edited by krypto; 05-10-2021, 10:04 AM.
                    [B]Steve[/B]

                    2010 Silver GXL Prado 150, D4D Auto, with a few non standard bits

                    Comment


                    • #55
                      Originally posted by krypto View Post
                      Joined the cracked piston club at 180k. Coming back from up north towing a camper under a bit of load when it went bang in the middle of nowhere, lucky to be able to limp to a roadhouse 3km down the road.

                      Had just replaced the injectors 5000km prior. After spending a lot of time researching while getting back to Perth it's pretty clear that the primary problem is with the piston design. I have done a fair bit of hard long distance towing a couple of times a year so the engine has done some hard work over the past 10 years, often in quite hot conditions.

                      The injectors play a part, but aren't the major cause. My take away is that there are a lot of pseudo experts on the net who don't really understand the science of what is going on, and a few knowledgeable experts that have properly diagnosed the problem. I would probably still have changed the injectors, but they don't fix the underlying problem of piston design. Bottom line is that the piston struggles with the thermal load from sustained heavy load and slowly fatigues and then eventually cracks.

                      Interesting that the EGR port runs in the head around the number 1 piston adding a lot of extra heat and that is a common failed piston. This guy is one of the few that seems to actually bring a bit of objective knowledge to the subject https://www.youtube.com/watch?v=dOQHwlt7698.

                      ​​​​​​​Luckily have sourced a new genuine Toyota motor and turbo fully installed for around 14k. The tow cost a fortune and a bit pissed at having an almost brand new set of genuine Denso injectors that I can't do anything with because the new engine comes with injectors (and turbo). I will invest in a Scangauge to monitor EGT in future and probably be a bit more reserved when towing.

                      ​​​​​​​On the plus side I didn't land on my roof like a guy we passed in the tow truck just down the load, who rolled his 4WD and boat.
                      When my pistons cracked at 155k in a hilux the EGTs were below 400c this is not fueling issue at all as you have discovered, Poor piston design, I opted for a new long engine from Toyota with the revised piston design, Refer to the bulletin to check the new engine number against.

                      Injectors and fuel pipes came with it but no timing belt.

                      Comment


                      • #56
                        Originally posted by davo94 View Post

                        When my pistons cracked at 155k in a hilux the EGTs were below 400c this is not fueling issue at all as you have discovered, Poor piston design, I opted for a new long engine from Toyota with the revised piston design, Refer to the bulletin to check the new engine number against.

                        Injectors and fuel pipes came with it but no timing belt.
                        You are spot on Davo!

                        Thanks. Which tech bulletin, can you point me to it? I found a tech bulletin (TSB EG-008T-0112 but can't find the engine number?
                        krypto
                        Avid PP Poster!
                        Last edited by krypto; 06-10-2021, 05:11 PM.
                        [B]Steve[/B]

                        2010 Silver GXL Prado 150, D4D Auto, with a few non standard bits

                        Comment


                        • #57
                          PM me your email

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                          • #58
                            Having done a ton of research on this problem it seems that there is a pre-dominant common factor to piston failures... towing and perhaps to a lesser extent power upgrades.

                            Applying some basic engineering on the problem and looking at failure modes it seems that the piston design isn't up to sustained high loads. Pretty simple, the Prado engine, and the pistons in particular, don't deal well with sustained high loads.

                            Heat may be a factor, but bottom line the pistons mechanically don't handle high forces well and begin to crack in a predictable way. There are different failures due to injector problems, but they show up very differently to cracked pistons. Expensive lesson for me.
                            [B]Steve[/B]

                            2010 Silver GXL Prado 150, D4D Auto, with a few non standard bits

                            Comment


                            • #59
                              Originally posted by davo94 View Post
                              PM me your email
                              Done.

                              Thanks for the info. I'm not convinced that the revised design solves the problem. Time will tell.

                              Have you read this article? https://toyota-club.net/files/faq/15...piston_eng.htm
                              krypto
                              Avid PP Poster!
                              Last edited by krypto; 06-10-2021, 05:15 PM.
                              [B]Steve[/B]

                              2010 Silver GXL Prado 150, D4D Auto, with a few non standard bits

                              Comment

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