|
You pretty much got it. The difference in pressure is very minor and we're generally not talking about a lot of air. But yes, the spring in the check would force the ball to go back to the seat and close as it cools close to ambient so in essence the inside of the gearbox would be slightly under pressure from ambient pressure outside the gearbox. The seals are typically enough to handle 7-10+PSI differential which is massive compared to what it would actually be experiencing. Barring worn out seals/shafts/housing/etc. Each individual cycle would be minuscule in water from the atmosphere (pulling a # out of my rear end, for a small gearbox like this probably only a ml or something, if that) but it adds up, especially if it's super moisture laden air. Larger systems (or by specific application) utilize desiccant breathers as well to remove moisture. e: Just to be clear, in this case the gearbox may actually cool slightly lower than ambient air temp due to the water in the environment, which would actually make it worse. It's still very small for pressure differential though. The main goal is to stop the the air from the immediate environment getting into the gearbox as much as reasonably possible. slidebite fucked around with this message at 23:32 on Apr 29, 2022 |
#
¿
Apr 29, 2022 23:26
|
|
|
|
| # ¿ May 18, 2024 11:54 |
|
|
That might be an option and is done in some tough applications, but it's generally not practical or even really needed. If you've got a gearbox in a wet location you might be able to get a breather away from immediate "splash" but probably not away from a high humidity unless you pipe it really far away and deal with any physical obstacles in the way. But, the solution already exists and is simple. Valved breathers are a very basic, proven technology with at most 2 moving parts: A very light spring and a ball. Regarding an under-pressure, it's a very small pressure differential. Many only have one moving part (like a lightweight rubber "flap") I see where your mind is going with this, but in practice (and millions of these are in service and have been for years) it's just not an issue. The small amount of head of the oil in the gearbox is probably causing a higher pressure differential on the seals than just atmosphere on its own. If the seals start to fail enough to draw in atmosphere you'll likely be leaking lubricant as well. Here is what a basic "normal" one without a desiccant setup looks like (they are all similar in principal): https://youtu.be/nvdVxP5BdMA
|
|
#
¿
Apr 30, 2022 00:52
|
|
|
MrYenko posted:Wrong thread. Agreed. I'd love to see more photos of that. And looks better than a C3 
|
|
#
¿
May 15, 2022 17:54
|
|
|
Don't think it's a pulley. The thinner pieces almost look like chunks of a bellhousing or something. Little round barrel shaped thing in the center almost looks like the rolling element from a cylindrical bearing, but I don't think so, and there should be tons more. Whatever it is, someone didn't have a good day.
|
|
#
¿
May 20, 2022 16:38
|
|
|
I'll take impaired or otherwise prohibited drivers for $1000 Alex.
|
|
#
¿
May 30, 2022 20:51
|
|
|
Jesus that escalated quickly
|
|
#
¿
Jun 7, 2022 05:40
|
|
|
Did the arm snap as well right where it's seated? Yeah, that could have ended really poorly. Glad it worked out OK comparatively speaking.
|
|
#
¿
Jun 10, 2022 14:51
|
|
|
Holy poo poo. Those strut towers... and basically every other fastener under the hood attached to the body. That's a parts car.
|
|
#
¿
Jun 16, 2022 05:31
|
|
|
God drat, that's Machiavellian. I love it.
|
|
#
¿
Jul 18, 2022 15:07
|
|
|
I genuinely thought they were mandatory like at 2000. Color me surprised. To contribute,  
|
|
#
¿
Jul 29, 2022 15:18
|
|
|
nitrogen posted:Horrible mechanics failure from helping a friend with brakes: I do not miss drum brakes.
|
|
#
¿
Jul 30, 2022 16:40
|
|
|
https://i.imgur.com/0NhP2kQ.mp4
|
|
#
¿
Sep 6, 2022 04:55
|
|
|
STR posted:Nissan.
|
|
#
¿
Oct 8, 2022 15:54
|
|
|
That sounds like a great idea that they thought long and hard about
|
|
#
¿
Nov 14, 2022 18:01
|
|
|
Any resulting farts smelling like artificial orange would be an interesting twist
|
|
#
¿
Nov 16, 2022 16:47
|
|
|
What is it?
|
|
#
¿
Nov 16, 2022 22:46
|
|
|
What do you expect? It's a cheap econobox 
|
|
#
¿
Nov 16, 2022 22:57
|
|
|
Well that's certainly something
|
|
#
¿
Dec 9, 2022 01:07
|
|
|
That truck driver is hosed
|
|
#
¿
Dec 23, 2022 00:57
|
|
|
I could literally watch morons destroying their own cars all day. 
|
|
#
¿
Dec 25, 2022 01:32
|
|
|
I HATE IT SO MUCH I'VE KEPT IT FOR 25 YEARS
|
|
#
¿
Jan 7, 2023 17:34
|
|
|
Took me a sec to realize what I was looking at and then said out loud "wtf were they thinking"No. 6 posted:Looks like it became a shovel job
|
|
#
¿
Jan 11, 2023 07:07
|
|
|
Not saying its a good idea, but I have a bit of respect for that.
|
|
#
¿
Jan 14, 2023 01:14
|
|
|
Christ, if he overloaded a 3500 that badly, what would be suitable for carrying it? 
|
|
#
¿
Feb 5, 2023 22:25
|
|
|
Jesus christ
|
|
#
¿
Feb 6, 2023 00:24
|
|
|
Elviscat posted:For a couple years, I would pull over and add oil to my Ranger every time the "CHECK GAUGE" light would blink, and the oil pressure would swing to 0 when I was making a sharp right-hand turn. My brand new work issued 2023 Silverado with the 2.7 Turbo (still can't wrap my head around a 4 cyl full size), the oil pressure gets to the bottom of the pressure gauge at low RPM. Coworkers does the same thing, so I guess it's normal. The warning light does not come on though but I was a little concerned when I first saw it.
|
|
#
¿
Feb 13, 2023 15:57
|
|
|
I have waaaaay more faith in that pin than I do on that drop platform on the top truck being towed.
|
|
#
¿
Mar 5, 2023 16:10
|
|
|
I don't know who's dumber, the guy doing the sliding or the Tesla owner who thought it best to get people to leave their protective cage milliseconds before a slow speed impact. Imperador do Brasil posted:Guy is an idiot but I also really hate videos with “watch til the end” and then there’s no payoff. I was hoping someone would pull the moron out of his car before he killed someone. He was just bouncing like a pinball off the snow and other cars. Why, yes, thank you good editing sir! I would never have seen that thermonuclear explosion otherwise!
|
|
#
¿
Mar 8, 2023 15:37
|
|
|
Holy poo poo there are some good ones there for sure. I loved this especially. https://youtu.be/3HKp2tRKo38?t=98 And the last one 
|
|
#
¿
Mar 21, 2023 15:00
|
|
|
Or "shop" is his stupid as gently caress buddy
|
|
#
¿
Mar 22, 2023 01:56
|
|
|
 I don't know what I expected but that wasn't it
|
|
#
¿
Mar 26, 2023 21:24
|
|
|
It's a tradition. Like AISS, car game, substance abuse and diabetes. If the post bothers you, take a fraction of a second to scroll past the post or put Chips on your ignore list for a few days. It's not a big deal. Others enjoy it, you might not. That's fine. Or, Imperador do Brasil posted:The sheep game is a traditional fun bonding activity for us automotive idiots and it’s really easy to scroll past one post in a thread.
|
|
#
¿
Dec 21, 2023 16:00
|
|
|
I loved Richard Dawson, as that was my era (although even a little old for me, more re-runs) but drat yeah, the repeated kissing of the female contestants in the 70s, looking back with the lens of today is a little https://youtu.be/-NX6yqCTRO4?si=uYktg2bHFbTKKMTx There was quite the mix from the ladies with a totally into it to more of a resigned "whelp, I should just get this over with" vibe.
|
|
#
¿
Dec 23, 2023 15:50
|
|
|
St_Ides posted:I recently found out that the Jeep Renegade disables its starter when it's below -30C and no block heater has been plugged in. Whaaat? For real?
|
|
#
¿
Feb 5, 2024 06:57
|
|
|
It's not like life stands still when there is polar vortex over Canada/Northern US for a week with -30 and colder in many places. Sure there will be some no starts and some cracked parts from improper antifreeze mix/winter prep, but it's absolutely commonplace with many places at -40 or colder for many days on end, if not weeks a couple times during winter. Nobody would argue it's good for the engine, but with proper antifreeze mix and oil weight as most do in those areas (60/40) it's not the end of the world. Diesels used to be notorious to start and often kept running for days but that's not as common anymore.
|
|
#
¿
Feb 5, 2024 15:38
|
|
|
You mean a turbo volute isn't supposed to be another combustion chamber?
|
|
#
¿
Feb 12, 2024 14:58
|
|
|
wesleywillis posted:I'm not sure I'd trust a civil engineer to evaluate any car mods. CommieGIR posted:Basic safety inspections would go a long way, even ignoring engine/performance mods. 
|
|
#
¿
Feb 28, 2024 14:56
|
|
|
tater_salad posted:Actually only the non / low expansion stuff should be used for this. 
|
|
#
¿
Mar 14, 2024 06:19
|
|
|
MrLogan posted:There are even people who still smoke cigs in TYOOL 2024 As he pulled up, noticed a guy outside the office smoking. Approached the door and smoking guy said "Oh, you must be Mr. Guywithappointment! I'm Joe, the advisor." Chatted for a minute and basically said something like "if you make such bad decisions for yourself that you still smoke in this day in age, I cannot trust you to make good decisions with my life savings." and left.
|
|
#
¿
Apr 18, 2024 19:47
|
|
|
|
| # ¿ May 18, 2024 11:54 |
|
|
Maybe he did? I don't know. Sounds assholish, especially since it obviously has nothing to do with someones slave to drug addiction, but I also get where its coming from... assuming it even happened.
|
|
#
¿
Apr 18, 2024 20:07
|
|