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oh really sunny boy - maybe you should learn before typing - today head bolts so they sell thousands are a one time use - oh thats right they also stretch with temps
Every fastener stretches otherwise it would break gramps. Even a grade 12 allen head bolt stretches and the one time use thing is a myth. Perfect example is Ti rods on the engines I work on. Pankl torques them to size them, I torque them to check bearing clearances and finally they get torqued on final installation and yet in the manual they're referred to as one time use torque to yield. When I did engine work at Ford the one time use head bolts could safely be used 3 times. Nothing high tech about a shovel, the valve covers are probably just crap and not flat rather than some mysterious stretchy studs created in a secret lab.
Yup they were by design made that way, shovel engine will swell almost .100" when hot. Why guys alway roached the rocker box gaskets going gorilla when cold tightening then as the engine heats up spitting the paper gaskets out as the torque increased exponentially. had to learn that one the hard way myself, worse case they warp the rocker box boss the nut seats on or pull the threads out of the head end.
Evo motors used the same principle from the cases up with the long studs, remember all the weeping base gaskets and pulled stud problems they had ?
Harley doesn't have exclusive rights on thermal expansion, Every engine on the planet changes dimensions at operating temperature.
This isn't going to be a perfect restoration, rather a cleaning, repair/rebuild and repaint. A factory resto would be impossible and I couldn't afford it. Just want a clean shovel to go with my Evo's, Twin Cam and M8. Besides, a lot of the newer, younger riders have never seen a kicker before.
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Yeah they do, just pointing the why behind this particular application.
I dont buy it and its not meant to be a slap in the face, I just question everything, otherwise myths and urban legends get passed along and taken as gospel with no explanation. "Did you hear shovel heads have special stretchy studs unheard of anywhere else to stop them from leaking oil?" To say the studs on the shovel cylinder heads were chosen for their special properties based on countless factors such as someone riding one in Alaska or Russia vs Death Valley and that the studs were put through rigorous testing and development to accommodate these very different environments makes me burst out laughing.
Let's just say they're grade 3 studs on a good day and they eventually still leak. A flat rocker box with a cometic gasket and allen head bolts would be better than what the factory put out as far as sealing goes.
YOUR WRONG dont care what you worked on or when or how many - some of us learned this taking bikes back apart over and over again if we did or or it showed up not done right
I me am done have shovel rocker leak to fix tomorrow can take pictures if some one needs
I dont buy it and its not meant to be a slap in the face, I just question everything, otherwise myths and urban legends get passed along and taken as gospel with no explanation. "Did you hear shovel heads have special stretchy studs unheard of anywhere else to stop them from leaking oil?" To say the studs on the shovel cylinder heads were chosen for their special properties based on countless factors such as someone riding one in Alaska or Russia vs Death Valley and that the studs were put through rigorous testing and development to accommodate these very different environments makes me burst out laughing.
Let's just say they're grade 3 studs on a good day and they eventually still leak. A flat rocker box with a cometic gasket and allen head bolts would be better than what the factory put out as far as sealing goes.
MLS gaskets were the best thing ever come up with for the old bikes, but that doesn't change the stud used, it enhances the intended design. You're kinda over reacting to the bit in question here.
I'm in the auto building industry, several decades now. Fasteners are very serious business and designed for specific application and specifications. Elongation and deliberate stretch are very real going back to early aircraft engine designs. One shot fasteners are the thing on most everything for decades now. Isn't myth or internet repeated fairy tales. Why most serious engine hardware is replaced once used today, the base properties changed when torqued and ran through heat cycles. It's deliberate metallurgy and physics not redneck hearsay. Idea was build in some give to help not chew the old garlock gaskets up through the heat cycles, radial aircraft engines used similar tech year back with about as much success not leaking.
Owners and backyard mechanics usually screwed that pooch over tightening slathering on gasket sealers allowing the gskets to squish out on the corners under the stud holes.
Nobody said **** about shovel cylinders by the way, we're chatting about cast alum heads and rocker boxes not cast iron, huge expansion factor difference. Shovel head bolts and base studs are as grunt proof you get, why you see rounded base nuts and head bolts or pulled thread bosses in the heads or the cases, they don't stretch and I've never seen one break.
Tedd has been selling communist nuts a bolts for years only couple bucks cheaper then Colony but same jack a$$ that also effs the bike up will only buy those
Funny thing is the block was full of oil where it drained down over the years due to the check ball issue that has plagued Shovels for years. Last I heard that problem has still never been resolved. I'll pull the oil pump to see if the walls are scarred up and gears broken from trash going through it. Good thing is the numbers inside the case match the numbers outside the case. The clutch basket was stuck to the hub. It finally broke loose and it was just old oil that glued them together. Oil pump, oil tank and starter is todays goal. Feel free to jump in and tell me what to check. It's been more than a decade since I played with a Shovel. I can do most of this with my eyes closed.
YOUR WRONG dont care what you worked on or when or how many - some of us learned this taking bikes back apart over and over again if we did or or it showed up not done right
I me am done have shovel rocker leak to fix tomorrow can take pictures if some one needs
It's you're not your and what specifically am I wrong about? I guess the bike you're working on must have allen bolts otherwise it would never leak.
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