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How Piston Rings Work on a 4-Stroke Engine

Model: (Various brands) Various
Part: Hydraulic pistons

In this video tutorial, see how piston rings work on a 4-stroke engine. In this case, there are 5 rings: 2 are similar to those on 2-stroke pistons, where the first ring simply retains the exhaust gases; the second ring assists the first, and there is an additional scraping edge that removes oil from the cylinder; additionally, there is a third ring which is the oil scraper and consists of three parts: the first is a very thin band, the second is the spring, and the third is another ring (together they form the oil scraper). The operation is simple: the first ring moves oil from the cylinder into the spring, which then moves through holes in the piston and into the piston itself; the last ring simply moves oil from the cylinder bore to the sump.

Updated on 21 May 2026 by ScegliAuto

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How to Open the Bonnet on the Lancia Y

To open the bonnet on this vehicle, follow these simple instructions: first, open the driver's door and locate the lever positioned just below the dashboard, marked with an image of the vehicle with the bonnet open. Pull this lever towards you until you hear a "click" indicating the bonnet is released. Next, exit the cabin and stand in front of the bonnet to disengage the safety catch and complete the opening. To do this, slightly lift the bonnet, locate the yellow lever underneath, and pull it to the left to fully release and open the bonnet.

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by ScegliAuto

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