Mahle Piston Rings Which Way Up

Rings with a groove in the outside diameter and a pip mark or dot on the side must be installed with the groove toward the bottom of the piston and pip mark towards the top of the piston.

Mahle piston rings which way up.

For 1 5mm and 1 16 ring sets the top rings are positive twist ductile iron barrel faced plasma moly inlaid. Only use suitable ring pliers to fit the piston rings starting with the bottom ring. A steel napier second ring and industry leading cp 20 oil ring round out the package. Install rings labelled top with the lettering facing upwards towards the piston crown.

Do not over expand the piston rings. Bevel on the bottom on the second ring is the norm it is a reverse torsional ring and acts like a scraper more than a compression ring. Pistons have to put up with extreme pressures as their working conditions have become significantly tougher in recent years. Compensated ring grooves assure proper ring loading and oil control.

Should it be looking up or down. At hastings manufacturing we want using our product to be as easy as possible starting with the second you open the box. The manley s first and second rings have no bevels in the outer edge cylinder wall but has slight bevel in inner edges piston ring groove the second ring matte black cast has a dot marked so it is looking up. The combination of mahle s patented hv385 thermal spray face coating and sae 9254 high alloy steel base material creates the ultimate in performance piston ring technology.

It has no markings but has a bevel in the inner edge. But what about the top ring. They must be lighter must have lower oil consumption and must be absolutely safe and reliable. Phosphate coating provides the grey appearance to the mahle piston.

In addition the second rings are reversed twist taper faced cast iron. Over expanding the piston rings will cause lasting deformation and compromise their running behaviour.