Are thinner piston rings better?
Modern, thinner rings have even more benefits than reduced friction, increased horsepower, and material strength. “They also increase ring seal because they’re more flexible,” Jones said.
How do you measure the tension on a piston ring?
A common method of testing the tension force of the piston and ring combination is to use a basic fish scale and simply pull the piston through the cylinder bore to obtain the maximum drag or tension force.
What does the oil expander ring do?
The expander can be thought of as a spring that is loaded when installed in combination with the upper and lower oil rings. The oil rings’ function is to scrape oil off the cylinder wall and push it inward to oil return holes or slots cut on the inside of the piston’s oil ring groove.
Do piston rings shrink?
Piston rings half more than halved in thickness since the 1980s. Here’s why they shrunk and why you shouldn’t be worried about it! The classic Hollywood line is you can’t be too rich or too thin.
Which piston ring is thicker?
Oil Rings
| Ring | Thickness (inches) |
|---|---|
| 1.5mm | 0.0589 |
| 1.2mm | 0.0471 |
| 1.0mm | 0.0393 |
| 0.8mm | 0.0314 |
What is a low tension piston ring?
In order to reduce frictional drag energy loss and increase fuel efficiency, gasoline direct injection (GDI) engines use thinner and lighter piston rings, called low tension piston rings. This huge increase in pressure creates more force on the low tension rings.
Do you GAP oil ring?
The oil rings only needed to be checked to ensure they were greater than 0.015 inches. The oil scraper ring does not need to be gapped.
Do you GAP oil control rings?
Moving to your final ring in the package – the oil control ring – life gets simpler. “On the oil ring rail supports you just want to make sure there’s at least a . 015-inch gap”, says Meagher.