lithium vs. moly grease, u joints, BMW R100GS
in [Tech]
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From: Mark on 27 Nov 2008 12:59 In article <bed1dc61-df33-439c-8d93-b70b7fed3ad4 @t3g2000yqa.googlegroups.com>, yefelnagrom(a)yahoo.com says... > > I would go for the moly grease, but graphite poses a special problem. > It can actually *cause* wear, if the oil that it is suspended in > departs the area > you're trying to lubricate. Sorry, meant to also say that moly is preferred, but it got lost in the edits. If a grease says EP on it, but not moly, I *suspect* that it's got graphite in it. For the relatively minor cost difference, why not use the best, especially if that's what's called for. Mark
From: . on 27 Nov 2008 20:03 On Nov 27, 9:59�am, Mark <bo...(a)devnul.net> wrote: > If a grease says EP on it, but not moly, I *suspect* that it's got > graphite in it. �For the relatively minor cost difference, why not use > the best, especially if that's what's called for. Back in the late 1970's, there was a *black* motor oil called "Arco Graphite". Owners found out the hard way what happens to engine parts when coated with graphite without an oil to keep it moving around. My problem with Arco Graphite came when the crankcase breather system got plugged up and the graphite bearing oil vapors came out the dipstick tube. It was aimed at the backside of the alternator wire harness plug where I couldn't see it, and it shorted out the field circuit so the battery was always dead... I replaced two voltage regulators and the alternator before I figured out that the Arco Graphite was causing the problem...
From: frijoli on 27 Nov 2008 20:34 .. wrote: > On Nov 27, 9:59�am, Mark <bo...(a)devnul.net> wrote: > >> If a grease says EP on it, but not moly, I *suspect* that it's got >> graphite in it. �For the relatively minor cost difference, why not use >> the best, especially if that's what's called for. > > Back in the late 1970's, there was a *black* motor oil called "Arco > Graphite". > > Owners found out the hard way what happens to engine parts when coated > with graphite without an oil to keep it moving around. > > My problem with Arco Graphite came when the crankcase breather > system got plugged up and the graphite bearing oil vapors came out the > dipstick tube. > > It was aimed at the backside of the alternator wire harness plug where > I couldn't see it, and it shorted out the field circuit so the battery > was always dead... > > I replaced two voltage regulators and the alternator before I figured > out that > the Arco Graphite was causing the problem... > > I had a car with cool stainless braided hoses. One of the hose came loose from the holder and slid up against the alternator fan causing a leak. I realized when the car burnt to the ground that gasoline was causing the problem. Nasty stuff! Apparently the plugged breather was the culprit? Clay
From: S'mee on 28 Nov 2008 17:02 On Nov 27, 6:28 am, "." <yefelnag...(a)yahoo.com> wrote: > On Nov 26, 7:47 pm, Mark <bo...(a)devnul.net> wrote: > > > 'Moly', or molybdenum di-sulfide is a 'dry lubricant' additive, not > > really a kind of grease. When metal to metal contact happens due to > > high loads, the moly lubricates and takes the wear - at least up to a > > point. Graphite is sometimes also used, > > I would go for the moly grease, but graphite poses a special problem. > It can actually *cause* wear, if the oil that it is suspended in > departs the area > you're trying to lubricate. oh really...gee you hear all sorts of BS from old krusty every day. I must have been imagining it when I used to use spray on graphite lubricants for load bearing sliding parts. Yep straight graphite isn't a lubricant...you lying sack of slime. -- Keith
From: ian field on 28 Nov 2008 17:19
"S'mee" <stevenkeith2(a)hotmail.com> wrote in message news:ed639286-e4e3-478a-8e70-c60bf1e6cdcb(a)w1g2000prm.googlegroups.com... On Nov 27, 6:28 am, "." <yefelnag...(a)yahoo.com> wrote: > On Nov 26, 7:47 pm, Mark <bo...(a)devnul.net> wrote: > > > 'Moly', or molybdenum di-sulfide is a 'dry lubricant' additive, not > > really a kind of grease. When metal to metal contact happens due to > > high loads, the moly lubricates and takes the wear - at least up to a > > point. Graphite is sometimes also used, > > I would go for the moly grease, but graphite poses a special problem. > It can actually *cause* wear, if the oil that it is suspended in > departs the area > you're trying to lubricate. oh really...gee you hear all sorts of BS from old krusty every day. I must have been imagining it when I used to use spray on graphite lubricants for load bearing sliding parts. Yep straight graphite isn't a lubricant...you lying sack of slime. -- Keith Its common to see "Lubricate with graphite" stamped on brass padlocks. |