It's amazing how this guy makes everything clear. I've never heard of this test before, but I understood everything from a single viewing. I guess some people are just born to teach.

This video deserves an award. Self disinterest, everything about the topic, applause.

As a handy home mechanic that will fix just about anything on a car from head gaskets to diagnostics,, i have to say,, i have lots of respect for good professional mechanics which are hard to find,, i could never do this for a living working at a shop. I can do it,, i just take longer than the book says. Thx for the post

"when the bearings disintegrate into your oil you'll think Tinkerbell lives there" lol

This is the video I have been seeking for WEEKS, thank you. I have an 88 Accord with a knock but upon researching knocking sounds, there are different problems that sound the same to me. My husband swears it's the bearings which we have a rebuild kit but he's working full time all week, I do not have the knowledge to tear that far into this car myself lol. I am worried there is a bad rod or crankshaft bearings bc I do not have the ear to distinguish the differences in these sounds, they sound pretty much the same to me. And my exhaust is loose, no cat, it rattles along with this knock but I notice the engine knock right upon starting it, the exhaust doesn't usually rattle at that same second. Anyway, I'm glad I found this video, it helped me understand this issue WAY BETTER than my husband just telling me. Thanks!!

I've been building engines for about 10 years now and it I'd all the videos I've seen, you're probably one of the only guys that explained to others what exactly a rod knock looks like.

That was incredible. Best explanation and test ever, bar none! I now have a way to test the knock in my engine which I feel confident will work. Thanks so much!

That is one of the most impressive ideas I've seen in a lot of years. The simplicity is amazing!

Thanks for your common sense approach to diagnosing this problem. I'll check out your other vids while I'm here. I'm glad I found you.

Best, most concise, and informative youtube video this watcher has seen.

This is quite clever and useful for a quick diagnostic with minimal invasion. I was just repairing an engine with a rodknock and it matches my experience as well. Thanks for the video.

Thanks for the very descriptive troubleshooting guide. I’ll be doing this tomorrow on my 1997 Accord.

Hell yeah this Video is helpful. Now i know a new skill. Thank you for sharing knowlege. Your video deserves a award man.

Superb diagnosis, explanation and demonstration.

I like the way how you explain things for like us who's not familiar with that. Thank you so much for taking your time making this video.

You reminded me of a lesson I had 30 years ago! Backyard Mechanic, Shade Tree Mechanic or Teacher. No difference!

Dang does this make sense or what. At last some explanation instead of just the sound of rod knock. this might have just saved me lots of time and money making a specific diagnoses. Thanks very much

Honestly one of the most well explained and professional video ever. You are awesome.

This video is amazing, the just right amount of humor, information, and visualization of what is going on. Though the image quality is ancient (as posted), WELL DONE all around!

Wow - I wish I had seen this years ago to really understand rod knock. Great presentation and information. Thanks!

That was explained perfectly! Gonna change my bearings tomorrow and this video gave me a load of confidence. Thanks!

Awesome technique and presentation. I've been working on cars/trucks over 50 years now and rebuilt a few engines and never heard or thought of this clever technique. Came across your video at perfect time. I have an F150 w/5.4 Triton in garage. o2 sensor failed and motor hydro-locked on gasoline attempting to start. Cam Phaser knock can sound similar. I have cams and timing components out and just tonight scratching my head trying to make decision how to proceed whether to replace faulty phasers and bad chain tensioners, only to find I have bent rod/bad bearing after the fact. Will sleep good tonight. Thanks Schrodingers Box!

Spot on demonstration, easy to understand, brilliant !

I 2nd that this guy deserves an award, you can apply this to just about any engine! Great idea!

Finally someone who goes straight to the point and just explain this perfectly. 👏👏👏

I have a feeling that I may have a knocking rod in our 11 HP Briggs Snapper RER. I will perform this test tomorrow and see what happens. Thank you, you are a scholar and a gentleman!

damn. i cannot believe how helpful this simple video is!!!!

My left ear enjoyed this video :D your channel has changed a lot since 2012! Keep it up!

So helpful! I don't know why you don't have over a million subscribers. I've learned more than what I would have on some other videos. It's about the methodology that you use and the logic that makes you such a knowledgeable mechanical engineer. When I get my next project car, I hope you are still around to tap your brain! Keep em coming! Thanks!

I love your videos. You explain what to do AND WHY. Thank you!

Looks like you did it again man. This is phenomenal! I wish I had thought of it, its such a common sense approach.

I'm just a newbie to this stuff and your channel, and you just helped me add another piece of knowledge into my diagnosing toolbox. love your channel and your explicit explanations and demonstrations.

Really good explanation, thanks, I only had a vague understanding of what rod knock was before, now it makes complete sense!

This clarifies for me the source of the knocking. Excellent tutorial, can't be any better. Thanks.

This video is as good and informative as the old army video explaining fluid coupling of a torque converter. Two thumbs up 👍👍 and a like 👏!

Very well explained and demonstrated!Thanks!🤗

thank you so much I always learn a whole lot watching your videos. Today not only did I learn something new, I saved 100$.

Very well done. You put and often over-explained issue into perfectly simple words. Thanks . And stay out of Schrodingers Box!

Excellent presentation. Thanks Mr. Mechanic

best explanation I ve ever seen .now I understand what happened to my little 1.2 Renault car

omg where has this video been??? I WAS gonna scrap my car but now I want to try to tackle this. Great job buddy this is so valuable!

Absolutely awesome video. You couldn't have made that any more simple to understand.

Hey that was a good video and it was well explained.

On the position of ''tumble'' Great testing method Nice & very interesting practical video

Best video on KZfaq bar none.

very good video. my mechanic told me the noise from my engine was rod knock and proceeded to quote me a price for repair. i did your test and it passed. looking at removing pan now and checking cam bearing. good work!

Nice video, thank you for taking the time to publish it.

this was an informative video. I learned more in 5 mins than I would of learned reading a manual. Thanks for uploading. 1988 Nissan 1.6L loud tapping noise on #2 cylinder? I'll try this tomorrow. Thanks again. Keep posting, I'll keep viewing.

ever so grateful for this video , wonderful talk through on this ! thank you so much !

Thank you very much , that was really very helpful .

Great explanation and diagnose of rod knock! Thanks!

That's a neat idea and might especially be useful to me as I try to figure out if my short block is junk. thanks

Much thanks -- I'm going to try this later in the week on a Toyota 3SFE that I suspect of rod knock.

You are one of the best mechanics that youtube can get....!

I love your video sir. don't have enough words to thank you.

Short precise and well explained there. Thanks

Thank you sir for this video . Excellent job on explaining very informative. Thank you

Man you are King, what a great explanation, very cool.

Excellent testing idea

Thanks for your videos, Very much appreciated.

Thanks you, It help me fix my detroit series 60

That was very nicely explained. I really appreciate it. I have subscribed to your page and hope you have more. Thanks again.

Very detailed explanation.

great simple quick explination

Excellent video and explanation

I recall appreciate your videos. I am currently enrolled in school to become a mechanic and it is very difficult to understand sounds of motor problems from text books. These are some of the best videos on the Tube. Keep up the great work and I wish you much success.

EXTREMELY Helpful Thanks!!

I know what I'm doing this weekend, good job,Great idea

Great video! Learned something new today :)

Nicely explained, thank you very much!

Thanks for video perfect test to confirm terrible news. my ford 302 had an issues on #8 i wonder if there's a trend that the damage occurs on the furthest cylinder from the oil pump. (would have been smarter to test furthest to closest and save some time). thanks again for the time and effort you put in. I watch the adds through and click there links hoping you get a few more cents from the corporate machine.

Thank you very much! I did indeed find this very useful!

Very great video. Super helpful. Just so scary to check your own pride and joy.

Thank you. Excellent video.

Great video. Thanks for posting it.

Awesome vid!

Excellent test

Excellent vid! Thanx for this.

keep up the good work!! I am tired of those crappy video making hacks all over KZfaq

Very nice to explained with practical thumbs up 👍

bro i will spread your mastery to those worthy. great old timer type trick

Thanks for the Video! It was helpful!

Found it very helpful, Thanks

NICE! thats a good little trick!

good explanation man! good job well done

Great video. Thanks for the help.

Damn. Awesome video. Keep them coming! I wish we could have head that engine fire up to confirm its running noise. Lots of confusion on KZfaq about that.

Excellent explanation

GREAT explanation !!!!!! Thanks!!!

u rock dude! Another great vid! thanks!

Wow very helpful video .. Thanks

great vid man

Great video brother

thank you so helpful you have saved me a lot of effort isolating the cylinder

Good video man!

Entertaining and informative!

I have both cylinder heads off for a valve job, might as well see if it was knocking too, neat trick using the downstroke

Great video!

BRILLIANT IDEA -- THANKS ALOT

Great explanation