For 1 5mm and 1 16 ring sets the top rings are positive twist ductile iron barrel faced plasma moly inlaid.
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.
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.
Phosphate coating provides the grey appearance to the mahle piston.
It is a good idea after installing all rings on the pistons to recheck each ring on each piston for correct installation.
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Should it be looking up or down.
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.
Only use suitable ring pliers to fit the piston rings starting with the bottom ring.
Install rings labelled top with the lettering facing upwards towards the piston crown.
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.
At hastings manufacturing we want using our product to be as easy as possible starting with the second you open the box.
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.
Over expanding the piston rings will cause lasting deformation and compromise their running behaviour.
Pistons have to put up with extreme pressures as their working conditions have become significantly tougher in recent years.
A steel napier second ring and industry leading cp 20 oil ring round out the package.
Compensated ring grooves assure proper ring loading and oil control.
But what about the top ring.
