| The Real Bev <bashley101@gmail.com>: Nov 06 07:58AM -0800 On 11/05/2017 08:05 PM, Frank wrote: >> never done? > I've never painted a car. I suppose some day I'll give rebuilding an > automatic transmission a shot, but I've been lucky so far. After an unfortunate shifting incident in Arkansas, we hobbled in to a local repair shop in Fort Smith and had the pleasure of watching the guy rebuild the motorhome trans by hand. He had Parkinson's, but it disappeared while he was working. I swear he looked like a machine programmed to pick gears up and put them down in exactly the right place. > I've done things ring and bearing jobs but everything is holding up > better nowadays. In life there are always tradeoffs :-( -- Cheers, Bev "Qui custodiet ipsos custodes?" --Juvenal |
| The Real Bev <bashley101@gmail.com>: Nov 06 08:02AM -0800 On 11/05/2017 05:27 PM, Frank wrote: > could be partially starved for oil even if it was full of clean, clear > oil. > The heat riser could be designed out of EFI engines. It's amazing how far one can be thrown when it's discovered that its stuckness is the cause of the engine overheating. -- Cheers, Bev "Qui custodiet ipsos custodes?" --Juvenal |
| Ed Pawlowski <esp@snet.net>: Nov 06 11:24AM -0500 > Not to denigrate the GOOD engineers out there - but he sure thinks > like a typical engineer - - - One with no practical experience and a > "god complex" only exceded by orthopedic surgeons. Intelligent people question Arrogant people think the know everything. |
| The Real Bev <bashley101@gmail.com>: Nov 06 08:25AM -0800 On 11/05/2017 08:48 PM, RS Wood wrote: > grow over time. I don't really understand why, but it does. It gets almost > imeasurably larger over time, until you finally feel it while braking at > speed. My mom had a heavy foot, but I don't think she was given to braking hard. My mom drove the car to work (7 mile round trip) on surface streets. I first noticed it at around 50K miles. She had the car "serviced" (as in "screwed") by the dealer 4x/year. He replaced all the rubber at 20K. Would he have removed brake deposits too? >> lady on the phone who told me the time. > I have a few Rolex watches (most received as gifts). > They suck at keeping time. Friends in Santa Rosa had one in their half-refrigerator-size safe. The fire popped it open and everything inside burned/melted, including what might have been a Rolex; why else would you keep a watch in a safe? > Life is one thing but the *primary* factor in brake pads is friction. > I buy $35 PBR pads with FF or GG friction ratings which last 30K miles or > so and the dust isn't objectionable. I'm a lousy housekeeper. I regard dust as a protective coating. What kind of people find brake pad dust objectionable? What kind of people even notice it? > c. Decent life (the only way to know is to ask owners) > Friction Coefficient Identification System for Brake Linings > <http://standards.sae.org/j866_200204/> TMI here! -- Cheers, Bev "Qui custodiet ipsos custodes?" --Juvenal |
| RS Wood <rswood@is.invalid>: Nov 06 04:34PM > Not to denigrate the GOOD engineers out there - but he sure thinks > like a typical engineer - - - One with no practical experience and a > "god complex" only exceded by orthopedic surgeons. On page 10 of that example the Master's Thesis covers the set of piston rings, where nothing said is the least bit complex. The author talks about the compression and oil ring, and that each has its purpose. He talks about the location of the piston ring. And that the first ring takes 75% of the pressure. The paper suffers enormously from lack of English language skills, which is to be expected in a paper from Europe, where, for example this is a verbatim sentence: "The choice of the number of rings should be the result of careful analysis, with one hand, depends on to the gas that passes into the crankcase should be the minimum, on the other, the number of rings determines the mass of the piston, engine height and friction losses." But that's as "technical" as the paper gets with respect to piston rings, which makes the paper essentially a summary of piston rings that anyone who isn't even an engineer could easily do. Then the guy shows a diagram of piston rings in action, with a few typos (so the paper isn't all that well reviewed), and then he talks about how bad it is to have burnt oil. The only slightly technical thing in the paper is a chart of clearances for the sealing and scraper rings that he clearly crobbed off the net somewhere and where he doesn't discuss any of the engineering tradeoffs involved. On page 34 he defines a temperature for each of three rings (finally spelling the word "scraping" correctly) and then he shows a trivially simple picture showing, essentially the same thing (so why does he do it?). That's it for page 34, so we move on to page 49 and page 50 for the last discussion of the piston rings. On page 49, he seems to be covering the same thing, in effect, as he did on page 34, starting with the verbatim sentence "The piston rings take a very important place when cooling the piston." Um. OK. Tell us something we didn't know before we read the paper please. He then chooses a heat for the piston crown that is high, saying the rings won't work at that temperature based on his simulations, but that they work at a lower temperature. Um. OK. (This is basic high-school level stuff.) Lastly, on page 50, he tells us "Increase the high of the scrap ring in order to adjust to reality". He doubled the height from 3mm to 6mm and lo and behold, it worked where it didn't work at 3mm! (Notice the tolerances here ... we're talking *huge*.) He also added channels to the rings which is, again, high-school stuff. In summary, while I am not going to fault the guy for his poor English, I will fault someone for not reviewing the poor English - because it just means that this paper is not a reliable paper because it was clearly not reviewed. Worse ... this paper didn't say *anything* that any high-school student doesn't know, about piston rings. The changes he made were enormous, where all he simulated was that it didn't work before he made the enormous changes, and then it did work when he did. Let's get back to reality, shall we. I never said that the design of *anything* is super complex at the stage of designing the perfect system. I even said that a spark plug is complex at that level. But at the level of using the thing in fixing a car, you already have very limited choices since all you're doing is fixing a car. To say that fixing a car by replacing piston rings is scientifically complex is just pure bullshit. And it's even worse that you backed up that claim with a high-school level paper (yes, I know it's a thesis but that doesn't change the sophomoric level of the paper). As an engineer, I'd be embarrassed if I claimed that paper said anything that is even remotely related to proving that, in practice, the selection of replacement rings for repairing an engine in your driveway is in the least bit complex. I give up if anyone thinks that paper proved otherwise because I'm only using very basic logic here because that's all I do. |
| RS Wood <rswood@is.invalid>: Nov 06 04:34PM Ed Pawlowski wrote: > Dealer may be 1 hour at $75 That's a joke, right? I realize in *some* parts of the US, the dealer may be more than half what they are here, but it's closer to $200 and even an Indy is at $100 an hour here. In a sense, it makes even more sense to DIY here than wherever you are, since the price difference between you and me for the shop rate is enormous. |
| RS Wood <rswood@is.invalid>: Nov 06 04:37PM rbowman wrote: > Cheaper? No, you're wrong on that one. Let's give up on the FWD. If you think they're made for handling in the snow, then they'd come with snow plows on the front. OK. I'm joking, but they're not made for handling. They're just not. No logical person on this planet can argue that with another logical person. Since at least one of us isn't thinking logically, and since you think it's me and I think it's you, let's just give up, because both of us can be right on that but given that, we'll get nowhere. You think it's all about handling. OK. You keep believing that. |
| The Real Bev <bashley101@gmail.com>: Nov 06 08:37AM -0800 On 11/05/2017 08:48 PM, RS Wood wrote: >>>What doesn't last longer on a car nowadays? >> Sometimes things like power lock actuators and some electrical >> connections 88 Caddy driver's window/door controls stopped working long ago. Stupid motor-driven passenger-side mirror just unstuck itself from the mirror and would have required removing the entire dashboard and AC to replace. Whoever thought of the stupid electrical trunk-lid grabbing latch should have been flayed alive. Engine ran fine up to the 90K end, it was just the rest of the stuff that died. > I was watching a video by the MythBusters on how to get out of a car that > is sinking in a pond (pool in their case) where someone mentions to roll > down the windows ... heh heh ... They claimed that power windows would work long enough to allow them to be rolled down. Do they assume it would take minutes for the electrical system to short out? Is that reasonable? > When's the last time you saw a roll-down window? Our 70 Dodge pickup has them. What you can't get is the stuff that keeps the windows from rattling. For a while I thought I wanted a car intended for third-world repair capabilities -- everything possible manual, etc. And then I discovered the joy of pushing the tiny button on the key that unlocks the doors :-( -- Cheers, Bev "Qui custodiet ipsos custodes?" --Juvenal |
| RS Wood <rswood@is.invalid>: Nov 06 04:40PM rbowman wrote: >> When's the last time you saw a roll-down window? > About 12 hours ago when I parked the car. That made me laugh! Thanks. I think I'm only going to respond though, to the posts that aren't already in the dirt (the fwd is in the dirt, the warp is in the dirt, the piston rings is in the dirt, and the drilled rotors are in the dirt). But there was a lot more in this thread than those few topics. I learned a LOT from you all. Thanks. |
| Wond <gboot.phil@gmx.com>: Nov 06 03:52PM On Sun, 05 Nov 2017 22:00:52 -0800, David Farber wrote: > http://webpages.charter.net/mrfixiter/images/Electronics/Rickenbacker/Flakey-terminals.jpg > http://webpages.charter.net/mrfixiter/images/Electronics/Rickenbacker/Filter-caps.jpg > Thanks for your reply. Looks like the filter cap lead in the middle of the pic may not be soldered properly! |
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