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EightBit posted:Is that a lawnmower plug? It doesn't exactly look like it belongs there. I hope you are being sarcastic, but the plug got mashed by the piston.
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Jan 13, 2013 04:18
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I assume he's talking about the fact that it's a visually different plug, with bronze/gold colored stuff on it. I think they just are cheap and mixed brands of plugs.
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Jan 13, 2013 04:21
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EightBit posted:Is that a lawnmower plug? It doesn't exactly look like it belongs there. :lemons:
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Jan 13, 2013 04:23
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Also, LeMons. Spending money defeats the purpose. Lawnmower plugs it is! 
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Jan 13, 2013 04:24
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General_Failure posted:Yep. I have a spark plug air adapter for that too although I feel a lot safer with a bit of rope because there is a mechanical reason for the valves not vanishing into the barrel. I have managed to successfully helicoil a spark plug thread on a 4 cylinder 250cc motorbike using this method and grease on the tap to avoid the shavings going in. I felt like some sort of master mechanic samurai. My 'rope' was a very narrow strip of rag about 200mm long, it was enough to completely fill the bore.
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Jan 13, 2013 04:25
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'The rope trick' is commonly used on jetski engines as it can be a pain in the rear end to pull flywheels and PTO couplers. Sure, there are special tools but PWC mechanics aren't exactly the fancy type. It's generally frowned upon as the higher class mechanics believe it puts undue stress on the piston, the rod, and possibly the crank. Perhaps the crank could go out of phase even. I've always thought that was BS, but amazingly I started using the special tools instead of the ole rope once I had a fancy stroker engine with a spendy crank.
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Jan 13, 2013 04:29
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Those looked like mower plugs to me too. What can I say! Besides mowers I've never had plugs with threads that short on anything.
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Jan 13, 2013 04:38
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General_Failure posted:Those looked like mower plugs to me too. What can I say! Besides mowers I've never had plugs with threads that short on anything.  The one on top is one of the ones currently in my SBC  (And the one on the bottom is one that was in until it met the piston, from being too long. Vortec application only, durr.)
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Jan 13, 2013 04:43
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Slavvy posted:I don't understand the almost mythical fascination with reverse thread; do people think they're cool by saying X bolt is reverse? I can't remember the last time I've seen a reverse thread anything on any vehicle, tierods excepting. I know they exist but come on, honda are not citroen or jaguar, they won't arbitrarily throw reverse thread in just to gently caress with you. Carteret posted:Lugnuts on most Army trucks. Thank CHRIST most of them were labeled with "R" if they were reverse. That and split rims with run flats. Changing a Tire was a half a day affair it seemed. The driver's side wheel lugs on my '65 Plymouth Fury were left-hand thread. The ends of the lugs were struck with a capital "L".
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Jan 13, 2013 05:46
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So I went to a Stomach Cancer fundraiser/track walk at Sonoma/Infineon Raceway/Sears point this morning and our pace car was Kyle Busch's Nascar truck. We try and keep an eye on him as he goes around the track, and heading into turn 10 there's a big cloud of white smoke, which follows him all the way into the pits. When we walk around to that area there's a huge spill trail for about 200 feet. Obviously we check it out once we get back, and immediately something was amiss, as the hood was drooling: There was no opening the hood, but on the dash was a hand-written piece of paper that said "DO NOT START, LEAKS OIL"  "Leak" might be a bit of an understatement. For his sake I hope it just blew an oil cooler line, but nobody was able to give us a definitive answer.
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Jan 13, 2013 10:04
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kastein posted:Same, anything spinning that fast that close to my feet gets very careful installation. The sample problems in physics texts are getting more interesting.
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Jan 13, 2013 18:40
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I'm going to have to dock myself 10 points for not showing work, 10 for using imperial units, and 5 for an answer with the wrong number of significant figures. I forget if I've already posted this one here... #6 cylinder of a friend's 2001 jeep 4.0L engine.  It'd been getting what sounded like a bit of piston slap for a while, he already had a new motor lined up to install so it wasn't a priority, not a daily driven vehicle. Then on the way to Pennsylvania (from southeast Mass) the knocking got worse and worse and worse until it started running funny. They pulled over and determined the engine was shot, parked it in a commuter lot and he put his camping gear in another friend's jeep and rode the rest of the way down. Towed it home with a uhaul on the way back, tore the engine down and found this. Near as anyone could tell, it dropped a skirt (causing the piston slap) which resulted in the piston slowly disintegrating, the rings blowing out and the piston melting/breaking into pieces. The HG, head, and/or cylinder jacket may have also failed, resulting in that amazing mocha in the #5 cylinder... Still drove onto the trailer.
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Jan 13, 2013 20:50
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It's kind of a shame, that engine could have been saved, possibly with some judicious overboring, if it had been looked at when it started the piston slap. Now it looks completely knackered.
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Jan 13, 2013 21:01
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EightBit posted:It's kind of a shame, that engine could have been saved, possibly with some judicious overboring, if it had been looked at when it started the piston slap. Now it looks completely knackered. If this thread has taught me anything about 4.0s, it's that they are never completely knackered. You can probably just remove the rod from #6, seal it back up, and nobody would be the wiser.
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Jan 13, 2013 21:12
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If it wasn't for the fact that the oil and coolant became best friends (his words) I'm sure it could have been overbored or something. I'm pretty sure the jacket is cracked in #6. 4.0s are literally $100 each up here and dozens are crushed every day, if not more. It wasn't a significant loss, there are at least 15 rebuildable ones (or even just bolt in and go) at my local pick n pull on any given day and most of them don't sell before getting crushed. In 10 or 20 years there might be a shortage, but right now losing one to a piston disintegration isn't a big deal.
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Jan 13, 2013 21:17
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 No Tracker alternator belt, thats a bad alternator belt. You're grounded  
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Jan 14, 2013 02:25
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14 INCH GRANDPA posted:
I can't see what happened...
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Jan 14, 2013 02:26
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Looks like it escaped. And left behind an electrifying pun 
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Jan 14, 2013 02:33
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Thats my point. Theres 2 belts in there, or was. The pulley just barely visible is the power steering idler. I have to get it off to get to the alternator belt which snapped, and we cant find anyone in the shop with hands small enough to even get to the adjuster bolt.
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Jan 14, 2013 02:40
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Time for a few feet of ratchet extensions? Or possibly remove the fan shroud and/or that goofy coolant tube?
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Jan 14, 2013 02:43
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Well yeah, thats what I'm going to have to do but I'm only getting 0.6 flat to change it 
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Jan 14, 2013 02:44
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Hmmm. Any chance you can get the new belt onto the crank pulley and most of the way onto the alt pulley, then disconnect the ignition coil and use a screwdriver plus a helper to bump the ignition and pull the new belt onto the alt pulley? I've only ever done that with v-belts, and only in dire circumstances (getting the new air compressor belt onto my M54A2 180 miles from home after it broke down on the way back from buying it, couldn't afford a $4/mile gate to gate tow) but it might work.
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Jan 14, 2013 02:52
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I wouldn't expect that to work with a ribbed belt. Also, before you dig into that mess, you made sure all the relevant pulleys actually turn, right?
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Jan 14, 2013 02:54
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Yeah, the alternator only rides on the alt and the crank. That I can get. The power steering belt is the bitch and a half to get the bolts out because the fan and that coolant pope are in the way. Alternator spins freely, I'm just raging at the amount of clearance 
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Jan 14, 2013 03:05
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I'm not sure what a coolant pope is, but it's a rather funny mental image. Looks like I'm never buying a Tracker.
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Jan 14, 2013 03:10
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It bends over the small hoses and eventually causes them to weep.
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Jan 14, 2013 03:11
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kastein posted:I'm not sure what a coolant pope is, but it's a rather funny mental image. I have that Tracker and have been putting off changing the belts. This isn't helping. 
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Jan 14, 2013 03:17
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Not catastrophic, but we had problems with road wheel caps on a few M1A1 Abrams during movements last year. There was a problem with the plastic on the new caps on our road wheels, and they kept fracturing and dumping lubricant everywhere. Had to wait hours for replacement caps and POL to fix a whole bunch of broken caps: Leaking cap on the left, broken in the middle. EBB fucked around with this message at 03:21 on Jan 14, 2013 |
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Jan 14, 2013 03:17
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Plastic caps? On MY battle tank?
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Jan 14, 2013 04:52
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Not for long, apparently. 
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Jan 14, 2013 04:53
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AB posted:Not catastrophic, but we had problems with road wheel caps on a few M1A1 Abrams during movements last year. There was a problem with the plastic on the new caps on our road wheels, and they kept fracturing and dumping lubricant everywhere. Had to wait hours for replacement caps and POL to fix a whole bunch of broken caps: So the bearings are lubricated with a liquid, not a grease? I don't know anything about how tanks work!
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Jan 14, 2013 06:50
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Slavvy posted:So the bearings are lubricated with a liquid, not a grease? I don't know anything about how tanks work! Ah-ha! Quick men, shoot for the caps! Seriously though? Those plastic caps really have the potential to cripple one of those things. Seems a bit of a poor design choice.
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Jan 14, 2013 06:55
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General_Failure posted:Ah-ha! Quick men, shoot for the caps! Seriously though? Those plastic caps really have the potential to cripple one of those things. Seems a bit of a poor design choice. "They'll never think to find cost-reduction here!" Seriously though, maybe they have some other kind of protection when they're deployed. AB could tell us I'm sure.
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Jan 14, 2013 07:00
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Deceptor101 posted:That piston really is completely gone: It reminds me of a coyote shaped hole in the side of a cliff.
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Jan 14, 2013 08:56
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PainterofCrap posted:Plastic caps? On MY battle tank? They will probably use it as enough of a failure to decommission it and use another. They've got thousands of extra tanks right now, and still making more. Plastic caps? On MY pork surplus? http://security.blogs.cnn.com/2012/10/09/army-to-congress-thanks-but-no-tanks/comment-page-4/
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Jan 14, 2013 17:54
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EVERYWHERE 
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After reading the head gasket torque discussion I will be going home and double checking my bolts. 
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Jan 14, 2013 19:01
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Boat posted:I have that Tracker and have been putting off changing the belts. This isn't helping. Did it today. Take off the upper radiator hose, then the 2 12mm bolts for the power steering idler. Then thdres 2 10mm bolts holding 2 lines by the alternator, which has a 12mmat the top and a single 14mm at the bottom. Wasnt too bad actually once the hose was moved.
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Jan 14, 2013 21:15
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Slavvy posted:"They'll never think to find cost-reduction here!" The side skirt armor doesn't drape down far enough to protect those caps. We parked the vehicles to avoid further damage since the maintenance guys could get to us quick with spare parts (and lubricant and a custom wrench because tracks suck to fix). Didn't break or throw track, so it was a good day. If we had, break out the sledgehammers and rope. 
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Jan 15, 2013 03:03
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   Some guy on a local site says he hit a pothole and broke his coilover.
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Jan 17, 2013 03:41
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Sure looks like a horrible mechanic failure to me. The upper end of that appears to have tapered threads and a perfectly square face, so I think the nut came off rather than the stud breaking.
kastein fucked around with this message at 04:45 on Jan 17, 2013 |
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Jan 17, 2013 04:43
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