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Engine ideals but quickly dies after trying some DIY to remedy blow by.

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Chris77*, Oct 9, 2023.

  1. rjparker

    rjparker Tu Humilde Sirviente

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    True in both cases. My point was all the other things including piston soaks don’t work. A rebuild includes rebuilding the head and cleaning everything. Assuming the cylinder walls are not damaged yet.

    There are good scanners out there but Techstream is the gold standard for Toyotas. Launch software based units are good including the Launch X431. Many like the XTool D8. Both can do hybrid specific tasks such as bleeding and calibrating the brake booster system.
     
    #21 rjparker, Oct 12, 2023
    Last edited: Oct 12, 2023
  2. Chris77*

    Chris77* Junior Member

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    Would you actually recommend a engine rebuild (before cylinders go bad)? Because, the average mechanic is not going to do it. From some preliminary research I would have to take it to a machine shop and tell them to do it. I emailed machine shop a while back and didn't get reply. The weird thing is buying a car right now is terrible. Unless you are ready to go electric a gen 2 is as good as anything out there. So I guess I was dreaming of possibly restore this car. Even turn it into a low rider or something like a show car just to drive as a daily because there is nothing good to buy. The EVs are really not that great and batteries cost as much as a prius did 20 years ago.
     
  3. rjparker

    rjparker Tu Humilde Sirviente

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    Get it back to running first before making it a low rider. Budget job on the drivetrain later? Let it burn oil.
     
    BuckleSpring likes this.
  4. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    "restoration" is a very squishy term. Everyone has a different idea of what it really means, which widens the spread of what it could cost.

    Lots of the cars you see at car shows today have had upwards of $40k worth of restoration work done (at todays' prices). I fully realize how much car prices have gone up. But they did not go up alone: parts and labor prices (applicable to restoration) went up too.

    I'm not offering this to discourage you from doing it if that's what you really want.

    But you'd do well to understand that buying a new or less-used car is always going to be cheaper than a resto project. Especially when you consider updated safety, efficiency and available warranty coverage.

    I agree with rjparker... best to focus on cheap and simple fixes that let you extract the last miles from the car you have.
     
  5. Chris77*

    Chris77* Junior Member

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    Fixed! I had to replace a connector and splice one wire. This is the best video I found for this project as there is an internal diagram of the connector.


    We don't see a lot of interesting mods or restorations on old prius. I think I am mostly just interested in driving this car as you indicate just like everyone else. Another 50-100k is a lot of miles and I am not even driving as much post pandemic.

    Toyota wouldn't rebuild it until it burns more than 1q every 600 miles. For curiosity sake we pick up this 06 prius with 150k for 6 grand. One could invest 14k in the car and still be at half price of a new car. I am not so sure that I agree with your assessment of what cars cost right now. We were being told they are going to deflate used car market. I have been watching for over a year now. It probably won't happen. Maybe it could be a business to restore old prius completely and sell them maybe even with a warrenty? Ever heard about the cars in Cuba? They can fix anything. That's how I feel about the post pandemic world it is moderately dystopian. Maybe we should consider fixing what we have?
     
  6. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    Philosophically, I love repairing things instead of replacing them. That's why I was playing Betsy Ross with needle and thread the other night, repairing a hole in my trousers.

    I do believe the used car market will cool down, but it's going to be on a much longer timescale. Far too long to help anyone who needs wheels today, this year or next.

    Cuba is an interesting case- they fix "everything" on those cars out of necessity, but they are aided by the fact that "everything" is pre-1960 technology. The stuff made then was built to be more repairable because it didn't go that long between overhauls in the first place. Also, labor was vastly cheaper. I think the most technologically difficult thing they (successfully) do is slump new windshields in hand-beaten molds. I was very impressed to see that.

    But they aren't building IGBT transistors to rebuild high current 3 phase inverters. They aren't building new fresh traction batteries out of minerals from the backyard. Their cars have frames that can be straightened and re-welded instead of unibody sheet construction.

    So, to take wisdom from the Cuban example you've offered I'd suggest sticking to simpler, lower technology cars.

    Before we got the Prius we had a Hyundai Accent. Very low tech. I repaired and rebuilt lots of things on it, so it was in excellent condition when we sold it at 190k miles or whatever. We still see the new owner in it every now and then.

    Again, not saying you couldn't do that with a Prius, but it's a much bigger challenge due to the relative complexity of the car.
     
  7. rjparker

    rjparker Tu Humilde Sirviente

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    I know a guy in Austin who started out flipping gen2s because non-runners were and are cheap. Even 30 day warranties started biting him bad. These cars are old and arguably the most complicated ever made, made more difficult with locked down software and expensive modules. His current business model is complete teardowns and parts sales. When I say complete I mean down to the bare unibody. Of course he often gets his upfront capital back selling the catalytic converter before someone else lifts it off his lot.
     
  8. Chris77*

    Chris77* Junior Member

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    Update:

    I just completed test drive after pcv, maf and throttle body cleaning. I am reporting positive results. There is an increase in response to acceleration (pep I think they say?). Also, I was noticing what seemed like a slight ping sometimes upon acceleration and this seems to be gone. This was a symptom on a 00 civic I had prior so this is what I call a 'ping' slight grumbly noise on acceleration, possible miss fire. MPG was 48.5 over 35 miles! Also looking good may have a slight mpg increase. There were other variables super unleaded and no AC.

    I think I will probably try the piston soak at first oil change which will be in Feb. I located a $200 bore scope at local auto parts available for free loaner. Is there anything else I should be looking at as far as maintenance and performance with or without decrease in oil consumption? Thanks for those who helped. I think this is the best tune up I have ever seen or performed. My vote is that it was worthwhile. I am also including pics of what color the oil is at 2500 miles, don't think there is much more to say about it but here it is anyway.

    oil2 (1).jpg oil2 (2).jpg