Pressure / Vaccum Test: Common & Costly Mistake!!

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How do you do a pressure and vacuum test? Start with avoiding this mistake when repairing your engines at home! This oversight with Mityvac's could end up costing you hundreds, if not thousands of dollars in small engine repair bills! This short video will save you time, money and frustration.
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Any links to products are likely to affiliate links and I may earn a small commission from qualifying purchases with no additional costs to you. Thank you!
00:00 Pressure and Vacuum Test Tutorial
00:16 Mityvac Index
00:30 What is a pressure and vacuum tester?
00:49 What brand of pressure and vacuum tester to get?
01:25 Vacuum test on a 2 stroke
02:06 The most common mistake with a pressure and vacuum tester.
Buy yours here: www.amazon.com/Mityvac-MITMV8...
#stihl #husqvarna #echo #Honda #diagnosis #mityvac

Опубликовано:

28 июн 2024

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Комментарии : 61

@VintageEngineRepairs Год назад

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

@elliejackson6907 4 дня назад

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 4 дня назад

Thanks :) great idea!!

@khndenmark 11 месяцев назад

Thank you for your willingness to share useful information

@VintageEngineRepairs 11 месяцев назад

You’re welcome, thanks for the kind words!

@jcondon1 11 месяцев назад

Good tip. I was using the vacuum scale wrong!

@VintageEngineRepairs 11 месяцев назад

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

@philliphall5198 11 месяцев назад

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

@VintageEngineRepairs 11 месяцев назад

You’re very welcome :)

@Big_Johns 11 месяцев назад

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

@VintageEngineRepairs 11 месяцев назад

Thank you John! I appreciate it :)

@Big_Johns 11 месяцев назад

Anytime brother

@BrucesShop 11 месяцев назад

Great video Tom.

@VintageEngineRepairs 11 месяцев назад

Thanks Bruce!

@dennishurlbert6143 11 месяцев назад

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 11 месяцев назад

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

@b.c.goldprospecting1724 11 месяцев назад

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

@VintageEngineRepairs 11 месяцев назад

Thank you :) easily done!!

@tinkeringtaylor3053 11 месяцев назад

Well explained Tom 👍👍

@VintageEngineRepairs 11 месяцев назад

Thanks Nev :)

@justinf1343 2 месяца назад

Great video. Thanks for sharing.

@VintageEngineRepairs 2 месяца назад

Thank you :)

@doglegjake6788 7 месяцев назад

Excellent video

@VintageEngineRepairs 7 месяцев назад

Thank you :)

@niconine268 Месяц назад

Nice couple of uses there for this tool 👍🏼

@VintageEngineRepairs Месяц назад

Thanks, I hope it helps :)

@robcole332 17 дней назад

As usual another great video sir

@VintageEngineRepairs 17 дней назад

Thank you :)

@haneyoakie14 11 месяцев назад

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 11 месяцев назад

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

@SPACEMIKEB Месяц назад

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

@VintageEngineRepairs Месяц назад

Good call :)

@jjrotogeek 11 месяцев назад

excellent info brother and great hat! LOL

@VintageEngineRepairs 11 месяцев назад

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

@jjrotogeek 11 месяцев назад

@@VintageEngineRepairs I want one

@TheGreasyShopRag 11 месяцев назад

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 11 месяцев назад

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 :)

@GuysPlayingWithTools 11 месяцев назад

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 11 месяцев назад

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

@GuysPlayingWithTools 11 месяцев назад

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

@steveriggenbach90 11 месяцев назад

I’ve used and trusted the mityvac for years.

@VintageEngineRepairs 11 месяцев назад

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

@steveriggenbach90 11 месяцев назад

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

@VintageEngineRepairs 11 месяцев назад

Always worth checking :) thanks for sharing!

@williamemerson1799 11 месяцев назад

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

@VintageEngineRepairs 11 месяцев назад

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 11 месяцев назад

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 11 месяцев назад

@@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 11 месяцев назад

@@treecycle4631 👍🍺

@niconine268 Месяц назад

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

@VintageEngineRepairs Месяц назад

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

@johnkosheluk1041 11 месяцев назад

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 11 месяцев назад

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.

@alfredprestwick7774 11 месяцев назад

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 11 месяцев назад

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!