In this video I have a look at a Acura MDX that was towed in and I was told that it was overhet several times. The last time they got it hot, it was so hot it would not start again. Let's see if we can make a quick diagnosis on this one using the Pico scope.
If an SMA Video has helped you out please consider giving using "Patreon" to help support us. The videos take real time to create and pull us away from real work that pays our bills. CLICK HERE: https://www.patreon.com/southmainauto
CHECK OUT OUR "SMA SWAG" STORE! Go on Teespring and get your very own SMA merch!
https://teespring.com/stores/the-sma-store
If you don't like Patreon feel free to use the "PayPal Me" link: https://www.paypal.me/SouthMainAuto
The South Main Auto Amazon Store:
https://www.amazon.com/shop/southmainautorepairavoca
AES Wave Automotive Diagnostic Tools: https://www.aeswave.com/cart.php?m=affiliate_go&affiliateID=2525b91fc8e906e8215984074c9d9e8f&go=https://www.aeswave.com/Miscellaneous-p9347.html
Thank you for all the continuing support!
--Eric & Vanessa O.
Feel like sending some swag to SMA because you love the videos but don't know where to send it?
Just ship it here:
South Main Auto Repair
47 S. Main St
PO Box 471
Avoca, NY 14809
Disclaimer:
Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained .
If an SMA Video has helped you out please consider giving using "Patreon" to help support us. The videos take real time to create and pull us away from real work that pays our bills. CLICK HERE: https://www.patreon.com/southmainauto
CHECK OUT OUR "SMA SWAG" STORE! Go on Teespring and get your very own SMA merch!
https://teespring.com/stores/the-sma-store
If you don't like Patreon feel free to use the "PayPal Me" link: https://www.paypal.me/SouthMainAuto
The South Main Auto Amazon Store:
https://www.amazon.com/shop/southmainautorepairavoca
AES Wave Automotive Diagnostic Tools: https://www.aeswave.com/cart.php?m=affiliate_go&affiliateID=2525b91fc8e906e8215984074c9d9e8f&go=https://www.aeswave.com/Miscellaneous-p9347.html
Thank you for all the continuing support!
--Eric & Vanessa O.
Feel like sending some swag to SMA because you love the videos but don't know where to send it?
Just ship it here:
South Main Auto Repair
47 S. Main St
PO Box 471
Avoca, NY 14809
Disclaimer:
Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained .
You need to use a pressure pulse sensor to see the pulses not a WPS sensor. It has worked great for me.
I have driven millions of miles and have never turned my engine into a briquette. Even with engines leaking water, antifreeze, oil, Oldsmobile diesels, and whatever. Sort of like a woman not knowing she is pregnant while having a baby. Braindead.
Love the scope videos thank you for sharing
Very good test!! Also works awesome with Radiator pressure tester.. just watch needle while cranking & pressure builds 🤑🤑🤑
good
I wish we could redo this test with a pulse sensor and see what we see. I’ve never used my wps on the radiator before. Interesting
Even though I love the videos, sometimes I feel you breeze over the "for dummies" part, So how did we tell by looking at a graph that goes from 0-5 PSI it need a head gasket?
The waveform looks like it shows every cylinder uniquely contributing to the overall pressure build. It looks like a six bar commutator with a unique signature. I'd say that's pretty skookum.
Is there a pressure cutpoint when cranking? Or should it stay below atmosphere? (0.00psi)
Looking at the trace the cylinder next to the number 4 has lower compression. Probably where your leak is.
Not sure how else to let you know but your shirts run much smaller than labeled. I ordered a 2XL and it fits much more like a L.
cool test most of time you can feel or see puffs out of rad.
That's a creative idea, look for early rise in coolant pressure. My first thought was normal pressure is ~10psi, however that only builds AFTER the coolant is warm enough to produce a tiny head of steam inside the closed space. So, we can run the system with cap off to burp for about 10 minutes, 0 psi while cranking, for sure. The backyard way to look for a gross leak would be to crank with coolant at the brim, cap off and watch for the bubbly fountain, ha ha. However if thermostat is closed, engine cold, it may take a while. I'm a little surprised you got a brisk pressure rise with thermostat closed….
I gallon antifreeze..1 qt. Flex Seal. Problem solved lady.
This sounds like a road kill project.
Hey Eric, I am continuing to watch your excellent channel brother. And remember. The next time your beautiful wife and awesome business partner accuses you of ever being immature, just tell her to get out of your Fort😀phil
If you overheat it often enough, it will cure itself.
I usually use a leak down tested and cooling pressure tester to identify what cylinder and what bank has the blown head gasket
Eric O, how did you adapt your Pico transducer to the Astro radiator test caps?
Interesting test. Would be interesting to see the same test on another known good car just to see how much pressure is built via a water pump itself.
yeah always wondered if you could see that. thanks for thinking out of the box!
I dont get how that is proof that the heads are blown, can you explain? 🙂
Wow steel belts showing at all 4 wheels, there lucky.
The word you mean to say is "irrelevant", not "redundant". Nice work.
Wow
Bad day in black rock when you get the your engine is smoked call from Mr.O,no need for a 2nd opinion i guess is the only good news news,lol
Isn’t the easy tell all route to troubleshoot a blown head gasket, to just look at the oil?
If you have anything else but oil in the oil…
I love that you have a Picoscope and are not afraid to use it!
MDX is a fine SUV, to bad someones mental health can cause these issues.
Adding a relative compression channel might show a correlation between cylinders being low on compression and the pressure transducer channel especially when the coolant is drained. Nice thinking Mr. O, keeping this in the back of my head!
Transmission is probably nuked too
great video EO i looked and listened to the waveform. At 1.31 of video you can hear the cadence change. You can see the pressure rise when cyl 6 is on compression. The trigger channel gives you relative compression for "free" at the bottom at it drops for a while and comes back. i think all the cylinders are compromised with cyl 6 being the worst. great use of you r tools all the best
So sad, folks that can least afford a loss like this. The inability or ignorance to perform simple maintenance results in the loss of transportation. Guess they will by another beater and do the same to it. Grast Video Eric, nice to see another way to diag a blown head gasket. I have stepped off my soapbox.
Am I the only one that wants the raw repair videos back, and less diagnostic stuff?
Just a hondoo. Time to recycle
I like that test Eric. Some people have to learn the hard way not to overheat their cars, especially Hondas.
Save big bucks on vehicle servicing, run till it breaks; then pay bigger bucks on new vehicle.
Doesn't the water pump create pressure?
Keep the videos coming. I've learned more watching your videos than anything else.
This one was definitely a "hot topic" but as usual you come up with an "Acura " diagnosis.👍😎
Could you do a quick scan?? Thanks
Parts that are probably nuked!! Catalytic converters. Expensive! Oxygen sensors. Spark plugs! Lower crank bearings!! Expensive. Warped heads more expensive stuff. Why drive it overheating?? Hate the car?
I automatically assume the head gasket blew when they over heat. It almost sounds like timing issues with that cranking. I always press the issue that when the needle goes in the read, the head gasket is dead. Also the head is WARPED because of it. Yes, dead engine. Replace engine.
Well at least they did not cool it off with ice cold water.
The slow ramp could be a mild head gasket leak or toasty cylinder leak. I would expect a larger leak. Need to compare to known bad. Hahah!
Another test would oil analysis at Blackstone Labs. They would see the antifreeze in the oil!
Rode hard, put away wet.
Nice capture… Pretty cool.
Needs a Windows update!, New driver behind windscreen.
Thanks for sharing and best regards from the UK.
Wow, significant pressure. I imagine the hoses would be bulging a minute after starting the engine.
Lots of shorty videos lately!!! i miss the hour long videos!
Another case of "Maybe, if I ignore the problem, it'll heal itself" syndrome. Oh well, it's worth $125 at the wreckers. The guy will get another car and croak that one too.