Pressure / Vaccum Test: Common & Costly Mistake!!

[@VintageEngineRepairs]

If this video helped you, please consider clicking on the THANKS button above to support my channel 🙌

[@saneauto]

Everything I do wrong &/or fail to do right in my videos becomes glaringly obvious when I watch any of your masterpieces. I especially need to refilm and reedit every repair video especially my first 30 seconds intro and my CTA at the end.

[@VintageEngineRepairs]

We’re all always learning and improving :) thank you for the kind words!

[@Big_Johns]

Well put together video Tom, you're mastering it like a champ. 👍

[@VintageEngineRepairs]

Thank you John! I appreciate it :)

[@Big_Johns]

Anytime brother

[@dennishurlbert6143]

Triple digits temps in my area, man , thanks for taking the time to inform, and yes bought one finally on your advice, I made my own and it worked but not as slim and refined. Update on the plastic spark plug barbs…they worked great and hardware stores carry a large variety of barbs. Thank you! Take care,be safe.🙏

[@VintageEngineRepairs]

So pleased all round Dennis! Glad you’ve had great success from the videos I share, it makes them worth doing!!

[@b.c.goldprospecting1724]

Thank you Tom, good information is hard to find, as a 2 stroke tech I must admit I have made this mistake.

[@VintageEngineRepairs]

Thank you :) easily done!!

[@elliejackson6907]

HI, Just had a look at your comment on reading vacuum. I can see how some people could get confused with the readings on the gauge. However, that problem only applies to people who still use the imperial PSI scale. It is so much easier using metric scale. All you have to remember is 50kPa. if we think of normal atmospheric pressure as 0 kPa then we use 50kPa for pressure testing and -50kPa for vacuum testing. Simple ! BTW 50kPa is the same as 1/2 Bar also known as 1/2 atmosphere Cheers EJ

[@VintageEngineRepairs]

Thanks :) great idea!!

[@SPACEMIKEB]

Thanks! I just put a label on my Mityvac to remind me of this.

[@VintageEngineRepairs]

Good call :)

[@haneyoakie14]

Great info! I plan on adding a tool like this to my shop and I appreciate your input as which tools are a good value. As for the vacuum, that sucks. I couldn’t resist. Sorry. Not Sorry. 😊

[@VintageEngineRepairs]

LOL! A real dad joke 🤣 glad you enjoyed the video :)

[@steveriggenbach90]

I’ve used and trusted the mityvac for years.

[@VintageEngineRepairs]

Good on ya, yep, they’re fantastic. Can’t fault it!

[@steveriggenbach90]

@@VintageEngineRepairs that they are. Not sure if all lip seal are the same pressure and vacuum. I’d check the specs. Great point.

[@VintageEngineRepairs]

Always worth checking :) thanks for sharing!

[@williamemerson1799]

Good one! 👍🍻 What about the brands you'd stay away from?

[@VintageEngineRepairs]

Thanks for the reminder William! Less the brand rather what they offer. Many are sold as just pressure, stay away from those. Instead always confirm that the one you order actually says both. There are a number on eBay that don’t make it clear, or they use a picture that shows one that can do both, but the description says just pressure or vacuum! I have owned a cheap eBay one before and it was fantastic! I hope this helps :)

[@treecycle4631]

I initially brought one of the cheap ebay units that did both but it wouldn't hold either so must have had an internal leak. Now have the Mityvac and it works like a charm.

[@williamemerson1799]

@@VintageEngineRepairs I can testify to the quality of the Mity brand. My all plastic, vacuum only is probably around 45 yrs old and still works, although one of the o-rings needs replaced..Thanks.

[@williamemerson1799]

@@treecycle4631 👍🍺

[@BrucesShop]

Great video Tom.

[@VintageEngineRepairs]

Thanks Bruce!

[@robcole332]

As usual another great video sir

[@VintageEngineRepairs]

Thank you :)

[@niconine268]

Critical issue there on the correct use of & reading the vacuum side of things in inches hg the correct way

[@VintageEngineRepairs]

Thanks, yes, I see a lot of people reading it wrong, including professional mechanics!

[@justinf1343]

Great video. Thanks for sharing.

[@VintageEngineRepairs]

Thank you :)

[@tinkeringtaylor3053]

Well explained Tom 👍👍

[@VintageEngineRepairs]

Thanks Nev :)

[@michaelmounts1269]

great tool…invaluable for Mercedes’ diesels etc

[@VintageEngineRepairs]

Spot on! Absolutely right!

[@alfredprestwick7774]

Since a crankcase experiences both pressure and vacuum, would it not seem wise to test the seals in both conditions, rather than just only vacuum? I realise that if the seals do seal under vacuum, then they will likely seal even better under pressure, but since while doing the test we are actually not only testing seals, but also the head gasket, (if present), base gasket, de compressor sealing. So for the sake of flicking the switch on the pump, why not just do both, so that all potential leak paths have been tested in both directions.

[@VintageEngineRepairs]

Yep! I always do a pressure and vacuum test every time. Pressure for the things you mentioned and the vacuum to test just the seals :) thanks for watching!

[@doglegjake6788]

Excellent video

[@VintageEngineRepairs]

Thank you :)

[@bushratbeachbum]

Really disappointing to find American Amazon links again. I've been thinking about getting the kit you have but keep forgetting and going back to a video to see which one it is, only to find it's much more expensive than first seems when converting to aud. We don't have to adopt everything from the us. If you're based in Western Australia, aud would make more sense to me. Otherwise, great video as always dude. Cheers!

[@VintageEngineRepairs]

Sorry mate, the links will all be to the USA, which also takes people to about 10 different countries automatically. However Australia isn’t in there because Amazon Australia is totally seperate. It’s not about adopting to the USA, it’s about being most accessible to the majority. I’m glad you enjoyed the video anyway.

[@bushratbeachbum]

@@VintageEngineRepairs all good mate. Mitty Australia have them listed on their website for the same in aud as the one on Amazon in usd!! HUZZAH!!!!

[@VintageEngineRepairs]

Awesome mate!

[@stanleybennett8879]

👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍✌✌✌✌✌✌✌✌✌✌✌✌✌✌✌🌏🌏🌏🌏🌏🌎🌎🌎🌎🌎🌎🌍🌍🌍🌍🌍🌍🌏

[@VintageEngineRepairs]

Thanks hahaha :)

[@niconine268]

Your tutorials, knowledge & manner of teaching are top tier. So precise & accurate

[@VintageEngineRepairs]

Thank you!! I really appreciate it ❤️

[@jcondon1]

Good tip. I was using the vacuum scale wrong!

[@VintageEngineRepairs]

Thanks James! Lots of people make the same mistake :) you’re not alone haha. I appreciate you watching and commenting!

[@GuysPlayingWithTools]

Great video. It's hard to wrap my head around the jacket when it's 100+ in the shade here. I know it's winter there but It's hard to think it might be cool ANYWHERE 🙂

[@VintageEngineRepairs]

Haha it’s FREEZING here at the moment! Thanks for watching :)

[@GuysPlayingWithTools]

@@VintageEngineRepairs I am sitting at the beach, it's a lot of things... but it's not cold. 🙂

[@cwill2429]

Thanks for sharing

[@VintageEngineRepairs]

You’re welcome!

[@farmerjackson709]

My word I have been doing it wrong all along 😮

[@VintageEngineRepairs]

Glad the video helped you!!

[@jjrotogeek]

excellent info brother and great hat! LOL

[@VintageEngineRepairs]

Thanks Brother my buddy’s daughter made it for me! All 100% hand made :)

[@jjrotogeek]

@@VintageEngineRepairs I want one

[@philliphall5198]

Thank you for sharing information and advice It’s the best one on the market period 😊

[@VintageEngineRepairs]

You’re very welcome :)

[@khndenmark]

Thank you for your willingness to share useful information

[@VintageEngineRepairs]

You’re welcome, thanks for the kind words!

[@niconine268]

Nice couple of uses there for this tool 👍🏼

[@VintageEngineRepairs]

Thanks, I hope it helps :)

[@TheGreasyShopRag]

I'm one of the regular users that doesn't pull full vaccuum on those seals. I know Echo generally calls for around 14 inches of mercury. Husky uses a lower number in their training. When I do a vaccuum test I sometimes feel like I'm walking on thin ice. At least twice I know I had a decent seal before I performed the test and wrecked the seal when the outer lip rolled in. Good video, I agree the Mity Vac is a decent tool.

[@VintageEngineRepairs]

Hey Scott! Thanks for sharing your knowledge and experience :) funnily enough I was looking at a husky manual for their 372xp and it says 0.8 bar / 11.6psi / 23.6 inhg! Maybe they dropped the vacuum in newer saws? Either way I appreciate your comment and sharing your knowledge :)

[@johnkosheluk1041]

Yea I have 1 I am a stihl mechanic the problem with that is the pressure release is on the bottom if you put it on the bench you can hit it

[@VintageEngineRepairs]

Yep that can happen! I think it’s designed for when you have greasy, dirty hands - the release is very easy to press and access. If it was small and out the way it would be annoying.