Mahle Piston Rings Which Way 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.

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. Do not over expand the piston rings. Only use suitable ring pliers to fit the piston rings starting with the bottom ring. Compensated ring grooves assure proper ring loading and oil control.

But what about the top ring. Barney145 view public profile. Mahle s grafal skirt coating reduces drag scuffing friction and cylinder bore wear. Install rings labelled top with the lettering facing upwards towards the piston crown.

Should it be looking up or down. Pistons have to put up with extreme pressures as their working conditions have become significantly tougher in recent years. It has no markings but has a bevel in the inner edge. Over expanding the piston rings will cause lasting deformation and compromise their running behaviour.

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. A steel napier second ring and industry leading cp 20 oil ring round out the package. In addition the second rings are reversed twist taper faced cast iron. They must be lighter must have lower oil consumption and must be absolutely safe and reliable.

It is a good idea after installing all rings on the pistons to recheck each ring on each piston for correct installation. 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.