Crankshaft seal - quick easy question
#24
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So much bad information in this thread...
1. There is obviously oil behind the crank seal. If there weren't, we wouldn't need the seal. (Air cooled VWs didn't have "front" crank seals, and despite a slinger plate and spiral grooves cut into the pulley, still leaked from this among many other locations.)
2. Nobody said that this oil was at full system pressure. (Looking at you here, 18psi.)
3. Still, the inside of the crankcase can, at times, be under some pressure relative to atmospheric. (Blowby much?)
1. There is obviously oil behind the crank seal. If there weren't, we wouldn't need the seal. (Air cooled VWs didn't have "front" crank seals, and despite a slinger plate and spiral grooves cut into the pulley, still leaked from this among many other locations.)
2. Nobody said that this oil was at full system pressure. (Looking at you here, 18psi.)
3. Still, the inside of the crankcase can, at times, be under some pressure relative to atmospheric. (Blowby much?)
Last edited by Joe Perez; 10-27-2014 at 08:44 AM.
#26
You guys can't be serious.
1) rubber isn't gonna cut jack diddly into a forged steel crank. dirt/rocks getting in between the rubber and metal causing the groove is A COMPLETELY DIFFERENT STORY, and not in any way shape or form the same thing as the original statement.
2) yeah duhhhh....however these guys are hinting that "oil can push out the seals". which is not the case. it is there, but the seals keep it from splashing out, and just contain it inside, there is no oil pressure whatsoever behind there
3) yes, blowby gasses and all that. exactly what I was talking about. gasses pressure, but not oil pressure.
I feel like you both are trying to troll me with this retardation, and I feel like the n00bs are being completely misled. Mazda doesn't put oil or grease on the seals when installing them. So if you want to, It probably doesn't hurt and it probably helps get them in easier, but gimme a break about all this other nonsense
1) rubber isn't gonna cut jack diddly into a forged steel crank. dirt/rocks getting in between the rubber and metal causing the groove is A COMPLETELY DIFFERENT STORY, and not in any way shape or form the same thing as the original statement.
2) yeah duhhhh....however these guys are hinting that "oil can push out the seals". which is not the case. it is there, but the seals keep it from splashing out, and just contain it inside, there is no oil pressure whatsoever behind there
3) yes, blowby gasses and all that. exactly what I was talking about. gasses pressure, but not oil pressure.
I feel like you both are trying to troll me with this retardation, and I feel like the n00bs are being completely misled. Mazda doesn't put oil or grease on the seals when installing them. So if you want to, It probably doesn't hurt and it probably helps get them in easier, but gimme a break about all this other nonsense
#30
One of my racer friends used to cut the lip off the wheel bearing seals on his race bike in order to reduce the parasitic drag it caused. The big drag reduction technique was to run aluminum shavings through the water pump (NOT on the bike at the time) until it loosened up. Really. At 12k rpm even a loose water pump ran more than enough water through the engine.
No, this type of stuff is not for everyone.
No, this type of stuff is not for everyone.
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