Pinpointing Pesky Exhaust Leaks with ease.

[@keithdefazio9613]

Don't forget to shift that motor back and forth with a prybar just in case that small leak is not evident immediately. And small cracks at the oxygen sensor bung are not to be overlooked while doing this. Oh and John is an awesome dude. Great video as always

[@smms1276]

HOW BOUT A GARDEN HOSE, PHILY FULL OF WATER??

[@ScannerDanner]

Sweet! Great tip. Love it and great suggestion by Keith of New Level Auto to flex the engine mounts with a prybar.

[@TrainedbyTechs]

Hey Guys & Gals! This is Brin. I wanted to share another technique that I've used when I suspect that a less than obvious exhaust leak is causing a biased rear o2, rear fuel trim concern or a catalyst fault. I watch rear o2 sensors while I plug the exhaust. If the rear o2 is biased lean at lower exhaust back pressure, (i.e. idle or low loads), I'll plug the exhaust to increase back pressure and watch the rear o2 sensor. If the rear sensor starts to consistently shift positive with the exhaust restricted/back pressure increased, you most likely don't have an exhaust leak causing your concern. I would recommend trying this several times to prove out your suspicions.

[@guayaco-dm3vu]

This is an Excellent test for exhaust leaks guys..it was taught to me by Keith a while ago and works everytime. It has mostly help me find that pesky p013c codes. You can also use regulated shop air and blow back into exhaust with the cone from smoke machine to do it..

[@CubasAutomotive]

I read this in ether the ATG books or a Quick Tip book by Joe Glassford. I haven't gotten the opportunity to test it out yet, but neat to see it here in action.

[@hassansmw5634]

Got to the point quickly and clear demonstration, this is a life and money saving tip. Thank you for this you are the best!!

[@alcap6145]

Yup! I did this. Got a shop vac from home depot, then put hose on the exhaust side, and taped the other end to the exhaust tailpipe. Then sprayed down the exhaust joints with soapy water and found my leak right away! Great info.....and this defe works! I had my doubts. Don't worry or doubt this trick. IT WORKS! thanks 😊

[@ecwurban]

That's freakin awesome! So much better than burning your hand trying to feel air!

[@movingupautodiagnostics8645]

Thank you so much for this tip. Love the channel guys.

[@jwilkers1]

I've been using this since I saw the video a few months ago and I've found several exhaust leaks with this technique. Great tip for pinpointing leaks. 👍

[@nickayivor8432]

Good morning Trained by Techs,have a great day, take care, happy Christmas 🎄 and happy new year 🎉 Trained by Techs Great tutorial thank you From Nick Ayivor from London England UK 🇬🇧

[@halopersin]

Awesome video guys! Thanks for a great tip. Definitely showing this in class.

[@D6Spanky]

Great job! I subbed! I was just telling some of the youtube guys that I need to find an exhaust leak but I don't have a smoke machine and they sent me the link to this video! Love thinking outside the box!

[@jmdiagnostics2869]

D6Spanky thanks Spanky you are welcome.

[@JOHNPHUFNAGEL]

That's a great tip I have always stuffed a rag in the tailpipe and listened for the leak or used my hand and felt for leaking exhaust, but this seems a lot faster and easier

[@High_Tech_Mountain]

Awesome! Thanks for the tip & the videos of course!

[@gerryjamieson1861]

A timely video and well explained. My 2005 Dodge Grand Caravan 3.3 L engine has thrown a P0420 code about a month after I replaced both upstream and downstream 02 sensors. This quick test can potentially save me hundreds of dollars. I'll post back my findings. Thanks

[@NewLevelAuto]

Been waiting 2 years for this. What did you find?

[@autorepairbymike1356]

Great tip. I've been using a smoke machine but this will actually save a little time.

[@TrainedbyTechs]

Mike Agostino I was doing the same with poor results. Smoke machines provide low pressure and volume and often does not show a leak. This is a simple method that seems flawless to me - Brian Culotta

[@autorepairbymike1356]

I'll be using this way from now on.

[@paulabend614]

Awesome tip

[@victoraberdeen2634]

I technique I have used for years is to insert rubber cone into exhaust and employ the services of shop air via my trusty compressor.

[@picoboo5048]

That's awesome 😎. Thanks for the videos

[@robtemple3445]

I've been a subscriber for some time now, but for some reason this just showed up on my video suggestion feed. What a great tip! Also, for bubbles, I just use the kid's bottle of "Gazillion Bubbles" from walmart. It's (I think) 64 oz of bubble making solution for about 4 or 5 bucks. Put it in a spray bottle & "go to town"! Thanks for the great tip!

[@tommynewhouse931]

great tip ,thanks will have to try it ...

[@SmittySmithsonite]

EXCELLENT tip! One of those, "Why the hell didn't I think of this" tips! 👍 Subbed - thank Keith. 😎

[@joshstaton508]

Great tip thanks for sharing

[@gearheadautomotivel.l.c.5476]

That is a fantastic idea! I do a similar thing with soapy water on diesels but the blower is built in on those. 😁 Thanks for the continued great videos!

[@TrainedbyTechs]

What "blower" are you referring to?

[@gearheadautomotivel.l.c.5476]

@@TrainedbyTechs The turbo. When I worked at a shop, I'd have someone raise engine speed to build boost. If you're soloing, you can often use bidirectional controls to accomplish the same thing.

[@DylanRabier]

Good tip thx! 👍

[@robbob8050]

A leaf blower works good too.

[@How2Wrench]

Great tip. You just gained a sub from the How2Wrench crew...

[@TrainedbyTechs]

Thanks Shane

[@1hlyGOD]

Thanx for the tip

[@1b9e7n3z]

Amazing ideea,amazing what we doing when have lot of imagination and knowledge

[@PaulysAuto]

Genius, sharing this video...thanks for this guys!!!

[@arechj]

Excellent video! Thanks!!!

[@geologic740]

Good method. Thanks for posting.

[@Gmansour1971]

Great tip, thank you!

[@mjl6425]

Is there any chance of blowing out any engine seals if there are no leaks? I imagine if pressure keeps building it’s eventually going to blow something out. What’s your take on this?

[@NewLevelAuto]

Because we are not directly introducing into the crankcase ventilation , the volume of air being pushed through is low. We would never suggest using this method for long periods of time. Just a minute and some GOOD soapy water will find that leak fast!

[@TheAutoTech]

Never seen that technique, will definitely have to try that! Did you have a suspicion of an exhaust leak before doing this?

[@manuelsalvatierra2940]

Also tape the other exhaust with rag/bag if more than one exhaust share the cat

[@JoseSandoval-ic5xe]

Hi can an exhaust leak cause poor engine performance and engine vibration in a turbo engine?

[@TrainedbyTechs]

That would depend on where this exhaust leak is. If it's significantly downstream of the oxygen sensors and turbo, I would assume, not likely.

[@protechautoservice4683]

Hey guys, great tip, really like the new channel!! Just as a production tip, probably shouldn't face the windows while filming in the daytime, I could hardly see your face!! Other than than that good job, keep it up!!

[@milesaway1980]

My exhaust shop said to never do this because it's way more pressure than an exhaust system is designed to handle, and can blow out gaskets and seals. Thoughts?

[@TrainedbyTechs]

How much pressure does a shop vac provide?

[@milesaway1980]

@@TrainedbyTechs No idea on that one, but they chastised me pretty hard when I told them I'd done this test.

[@TrainedbyTechs]

I would suggest to them to watch this video and message us with any concerns. We know multiple people who perform this test without causing damage. The pressure and volume a shop vac provides is ideal for pinpointing leaks

[@milesaway1980]

@@TrainedbyTechs Agreed, I thought it worked fantastic.

[@smms1276]

👍 👍 SWEEET, THANK YOU

[@hajs386]

I would atleast try to block off the exhaust flange closest to the engine you could blow particles right back into the motor.

[@burtpilon1735]

Nice... smoker for sale lol

[@PhillipBailey]

I have a smoke machine but I know someone looking for one. Maybe I'll buy yours. 8-)