Hot answers tagged

10

tl dr - Have no fear of Vaseline and o-rings O-rings are made out of many different materials. I would suggest that those o-rings which are made to work in the automotive realm are made to be resistant to things such as oil, gasoline, and other petroleum products. This would include Vaseline. While Vaseline and other petroleum products may degrade real ...


7

No. As far as I can tell, there is no reason that Vaseline might gradually degrade the rubber O-ring on which it has been applied. O-rings that are manufactured for automotive purposes do tend to be made in a rather durable fashion so as to be able to withstand whatever sort of fluids that might accidentally get spilt during car maintenance. If you are ...


6

The piston rings prevent the two from mixing freely. Note that it isn't possible to have the two perfectly isolated from each other. There will be a little bit of oil that gets burned during consumption, and some exhaust gases will find their way into the crankcase. As these rings wear, the amount of oil lost to the combustion chamber increases. If a ...


4

Lower "cold side" of the Carnot cycle leads to better theoretical efficiency, sure, but have you calculated how much? 10-20 K colder intake with the same 1000 K combustion temperature affect final efficiency by 1%. And that efficiency is 70% in any case, so you can guess that there are so many more parameters lowering the final efficiency to 25%, that the ...


3

Oil Scavenging Rings There are several rings on a piston. Depending on the application and use of the piston it may have up to five ring grooves near the crown. Here are some points of interest. The top ring is always the compression ring. It does prevent some oil from getting involved in the combustion process but it is not it's primary duty. The ...


2

Absolutely. The great thing about having the zerks is when you put fresh grease in, the old grease comes out. With the old grease comes any dirt and grime which may have collected. This should keep your heim joint in good stead. Most heim joints are completely rebuildable, meaning you can take them apart, clean them, regrease, then put them back together. ...


2

Yes the piston rings. The small metallic bands on the piston head.... From the bottom...As the piston rises and drops (compresses) it pulls oil up to help with lubrication. If the rings were not in place it would flood the chamber. Also the rings do expand slightly with heat as does all metal. The top has a "headgasket" preventing oil and water from ...



Only top voted, non community-wiki answers of a minimum length are eligible