Mahle Piston Rings Which Way Up

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. 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. Over expanding the piston rings will cause lasting deformation and compromise their running behaviour.

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It has no markings but has a bevel in the inner edge.

Mahle piston rings which way up.

Mahle s grafal skirt coating reduces drag scuffing friction and cylinder bore wear. They must be lighter must have lower oil consumption and must be absolutely safe and reliable. Pistons have to put up with extreme pressures as their working conditions have become significantly tougher in recent years. At hastings manufacturing we want using our product to be as easy as possible starting with the second you open the box.

Compensated ring grooves assure proper ring loading and oil control. 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. Phosphate coating provides the grey appearance to the mahle piston.

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. Barney145 view public profile. 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.

Should it be looking up or down. It is a good idea after installing all rings on the pistons to recheck each ring on each piston for correct installation. But what about the top ring. In addition the second rings are reversed twist taper faced cast iron.

Install rings labelled top with the lettering facing upwards towards the piston crown. For 1 5mm and 1 16 ring sets the top rings are positive twist ductile iron barrel faced plasma moly inlaid.