Engine Knock even after cleaning EGR pipe cooler

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Radiospank, Feb 28, 2021.

  1. icyrius

    icyrius Member

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    I could not remove mine. Screwdriver started to slip and decided to stop before totally messing the screw heads.
     
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  2. Mendel Leisk

    Mendel Leisk Sunday driver DIY’r

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    Same experience here.

    Consensus seems to be that with an impact driver it can be done. That’s a manual tool, you just set it on the screw head and rap with hammer. Each hit impacts and slightly turns it counterclockwise.
     
  3. ChapmanF

    ChapmanF Senior Member

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    If you have shop air available, a darned-near-magical approach is Lisle's "62140 seized fastener removal master kit". It doesn't put any twist on the screws at all, creating zero chance that it will twist the heads off or round them out even by accident. The tool does absolutely nothing but lightly bop straight down on the head (as fast as only an air tool can bop), and it has flats so you just gently ease it counterclockwise with a wrench while it bops.

    If that sounds dubious or if you've never tried it, boy are you in for a surprise.

    I don't work for Lisle or get any cut, but I've worked some miracles I wouldn't have been able to without it.
     
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  4. ASRDogman

    ASRDogman Senior Member

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    My experience with the impact drive is one "good" hit breaks the bolt/screw loose and they you don't need it again.
     
  5. Radiospank

    Radiospank Member

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    I have an impact gun and that usually will grab phillip head screws with ease, well see tho because I'm going to clean it this coming week when I check my ignition coil on cylinder 1.
     
  6. ozmatt

    ozmatt Active Member

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    If you have a vice, hex impact driver and a long phillips #2 it's not an issue
    Posted via the PriusChat mobile app.
     
  7. ChapmanF

    ChapmanF Senior Member

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    What people call an impact "gun" is usually a wrench driver that uses impact to impart really strong torque. Just the ticket for loosening very tight, large nuts and so on. The danger when using it on small seized screws is that the large impact torque may twist the head right off the screw, or the pattern right out of the head.

    When you compare it to what a seized-fastener removal tool does, the hand-banged ones are mostly applying a downward bang (though they contain a cam to give a leftward twist at the same time). The air-powered ones like the Lisle are different even from that: they eliminate that cam and they deliver no twist whatsoever. Their only job is to bop straight down on the fastener really fast while you just gently twist to the left with an ordinary wrench. The difference is unmistakable when you experience it.
     
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  8. Radiospank

    Radiospank Member

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    1BC62D9C-E260-4BE8-BB33-DA5C75962FCF.jpeg E28679DB-B6BB-4186-B296-F3B1F125ED35.jpeg D91D462C-B2B4-4450-B4E1-A7B77DCD9A6C.jpeg 8FB6DCFD-AD5E-4CC3-AB9D-C2D75654147F.jpeg Cleaned the egr valve, what a PITA just to get that off, had to take the whole cooler off again :(
    Made sure to press the valve open and close and cleaned it real good so now it’s all done. Now to diagnose the misfire on cylinder 1, I swapped out coil with cylinder 2 and noticed that there was oil in spark plug 2. Not seeing any misfires on cylinder 1 but I am seeing it as a permanent code, still trying to clear the codes with my obd2 scanner. Currently it’s throwing a p0118 coolant sensor code
     

    Attached Files:

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  9. ozmatt

    ozmatt Active Member

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    watching this thread closely and nervously while dragging out the job myself
     
  10. ASRDogman

    ASRDogman Senior Member

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    Oil in the spark plug area means you have a leaking valve cover gasket.
    Enough oil can cause a missfire problem.

     
  11. Radiospank

    Radiospank Member

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  12. Radiospank

    Radiospank Member

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    It’s a very minute amount of oil, and it’s on cylinder two, the misfire occurred on cylinder 1. Either way looks like I’m headed for head gasket and new valve seals
     
  13. Radiospank

    Radiospank Member

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    fixed my CEL, turns out i disconnected the coolant sensor right underneath the EGR Cooler, lol i don't even know why i disconnected. Cleared out the misfire codes, and runs good now but the shakes are now more often even in mid day when starting the car.
     
  14. Willy Toast

    Willy Toast Junior Member

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    Glad you were able to clear the CEL code.

    Regarding the shakes did you check the state of the damper between the engine and the transaxle apparently there is a plastic cover that can be moved to provide some access to check for damaged springs etc. I am going to check that area regarding the rumble I have during light acceleration. I will also do my PCV valve which I did not do in the last job because Toyota did not have the part when I went to pick it up. As well I will change my transmission fluid.

    If that fails next I will watch some Scanner Danner videos to see if he has fixed a rumble like mine but in a different kind of car. The guy seems to be able to fix almost anything using a good scanner tool.
     
  15. Radiospank

    Radiospank Member

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    I’ve done every maintenance protocol recommended, the shakes I’m referring to is not slight and it’s quite loud and indicative of a head gasket issue. It’s gotten worse since winter so going get a head gasket kit and get it done soon
     
  16. Radiospank

    Radiospank Member

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    If anyone can chime in, are there any other parts I should change along with my Head gasket? Thinking of getting a fel pro gasket kit with and it comes with quite a few parts. Is this all I need?
     
  17. ASRDogman

    ASRDogman Senior Member

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    I personally think the best parts to get for the head gasket is the head gasket kit from Toyota.
    Seems some people are having problems with other brands.

     
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  18. Raytheeagle

    Raytheeagle Senior Member

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    I'd recommend the engine water pump(y).
     
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  19. Radiospank

    Radiospank Member

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    Isn’t the water pump easily accessible? Just watched a video and it’s just under the intake resonator
     
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  20. Willy Toast

    Willy Toast Junior Member

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    I look forward to hearing how this goes. It looks like a pretty big job. If my rumble gets worse I may have to do the same one day.
     
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