How to Replace Knock Sensors on a Toyota 3.3L 3MZ-FE

[@rrmech11]

This is the best KS video out there. Excellent Excellent Jack.

[@oldmoon68]

One of the best video I seen regarding this engine, appreciate making the video , learning a lot for my 2004 Highlander thank you

[@johnlee4897]

Ended up being a mini overhaul of the whole engine not just knock sensors. Great tips on those cracked, brittle and warped hoses and connectors. How much does it it make you mad that manufacturers (including Toyota) insist on using plastic parts and sealant substituting for gaskets? Great job as always, Jack. Good for another 200,000 miles.

[@gackal1982]

thank you so much! by far the best video i've seen related to this repair, your work and craftsmaship is flawless, i think is worth mentioning that the lower air plenum gasket to be replaced as well.

[@TaurusAdventures]

I’m here coz I found a sienna for sale going for cheap, with “only knock sensor need replacement”. Looks like you just changed my mind 😂. Thanks for all the mechanics posting such videos. Helps a lot of people like me.

[@jackhfletcher]

Haha yeah… there’s a reason it’s selling for cheap. And I guarantee you it’s more than “only knock sensors.” It’s gonna need more work.

[@dunken27]

Absolutely first class video. Legend for taking the time to show us all. Thank you for this 🙌

[@jackhfletcher]

Thanks for the comment! I’m glad you liked the video!

[@dunken27]

@@jackhfletcher having to do this whole job on mine soon...i will come back to this video for sure..cheers fella

[@ShouYe-zq6eb]

Thank you. This is a extremely helpful video.... I have a 2006 Toyota Solara with 3MZ-FE engine with exact same issues. I changed the knock sensors on bank 1 and 2 with valley plate leaking fix. It was very long and tedious job but with the help of your video, I was able to pull it off. Thank you!

[@subbiesalaki]

Very nice video and very comprehensive on steps, torque value, etc. I have ES330 w/ 3MZFE. I found it surprising that Lexus ES330 Thermostat housing pipe is made of aluminum instead of plastic. For now, I am just doing the spark plugs and VCG at 248k miles and will wait until the valley plate is actually leaking before I mess with them :P

[@neduk8r]

I got the P0328 engine code. Your video was the most helpful. Yes all my connectors were dried and cracked and guess what? I had the same coolant crystals. THANK YOU!

[@ShouYe-zq6eb]

I ended up overhaul the knock sensors (Rock Auto as Jack recommended), sensors connectors, intake gasket, fuel nozzle O-rings, thermostat. It gets expensive but they are maintenance items you have to do it. All the OEM parts came out about $500. Hopefully this helps... currently I have 232K miles on my car.

[@emmanuelcarrion5168]

What knock sensor harness did you order ? Im about to do the same job

[@MelissaDanapas]

Best KS video out there Thanks.

[@jayasuriyafamily]

Very valuable video. Thanks.

[@FreeWill-is-Love]

Thank you, Sir. Extremely Helpful! Excellent video. Well done.

[@jackhfletcher]

Thank you!

[@produceguy77]

This video was top notch. I had to get this done about 3 years ago. I can't remember which sensor it was, but I bought the "OEM" sensor on ebay. I'm now learning that alot of those, even though they say denso on them, are fakes. I'll get my next one from rock auto Anyway I had a coolant leak from the radiator hose at that time. What's the name of the hose that sits on top of the knock sensors? I'm trying to find it on rock auto and can't figure out what it is called. Probably the best how to video I've ever seen. 5 stars

[@jackhfletcher]

It’s called a water bypass hose. I don’t think Rock Auto has it. I would just get it from the Toyota dealership. It’s only about $25. But if you Google “2006 Toyota Sienna water bypass hose” you’ll find it online. Thanks for watching and leaving a comment. I’m glad you liked the video!

[@chu30cho]

You are the Man thanks so much

[@frankyrx8459]

Great job, nice and clean work.

[@ShouYe-zq6eb]

Hi Jack the video is very helpful... Are you planning do 3MZ-FE timing belt change video in the future? There are couple videos out there in youtube are pretty good but there is no torque spec, tools and replacement parts # as this video. Thanks.

[@jackhfletcher]

It’s funny you mention that because I’m about to post that video! I’m still working on editing the video but I hope to have it posted by next weekend.

[@sgreywall]

@@jackhfletcher I will second that request

[@jackhfletcher]

I just posted the timing belt video if you guys want to go check it out!

[@luckyme5122]

Awesome job

[@jackhfletcher]

Thank you!

[@nickarnold9557]

Thanks for posting this. Exactly what I needed to see. This is beyond my skills unfortunately, and I’m thinking that the cost on this job with all the recommended work you did as well, basically mechanically totals the vehicle. I’m guessing this is going to be $4-5k, and the car probably isn’t worth that. Tough decision time.

[@jackhfletcher]

Most shops in my area (Houston, TX) are charging around $150 per labor hour. My shop is $135 per hour. We would normally charge around 6 hours to replace the knock sensors. If you tackle everything you saw me do in the video (valley plate, valve covers, spark plugs, etc) it could easily reach 10 hours. The trick is finding someone who will actually take his time and do a good job. For example, a lot of guys don’t properly clean the valley plate, etc.

[@sgreywall]

Very professionally done, how much difference when dealing with the same engine in a Lexus RX 330 ?

[@jackhfletcher]

Basically no difference at all.

[@ro6721]

Did the fill neck piece need silicone as well?

[@GoingOrbit]

I had to do the timing cover on a 2013 ford explorer. Talk about not trying to smear the silly cone 😒

[@dunken27]

Quick question anyone...What is the I.D of that Bypass Hose above the Sensors in the gully??

[@carljhonson4]

I've been so scared of doing this for a long time now. Mine is around 200k miles now and it's getting worse and worse by the day. It started around 160k.

[@jackhfletcher]

It’s a lot of work, but you’ll be happy once it’s done! I hope you find everything you need here.

[@tedslife7086]

Might be a good time to replace your 4 oxygen sensors too..lol

[@tinleo333]

What was the lubricant you use for the hose? 38:35

[@jackhfletcher]

Sea Foam Deep Creep. You could also use soapy water.

[@tinleo333]

Thanks@@jackhfletcher

[@WhatRYouAimingAt]

Where’s your shop located brother?

[@jackhfletcher]

Katy, TX

[@tedslife7086]

Go through the glove box and cut the wires

[@Martin-db4pu]

*Promo SM*

[@billlaing4936]

Why the fuck would they put that sensor there beyond me

[@defafa9249]

No way that car is a Toyota

[@jackhfletcher]

Because…?