© MAHLE

Recognizing MAHLEPistonsFinding Information

Today’s Example- Dodge Sprinter

Ideal Conditions: Brand New Piston!

GRAFAL® Skirt Coating

GRAFAL® Coating

– Reduces Scuffing

– Reduces Friction

Ni-Resist / Armored Top Ring Groove

Ni-Resist Top Ring Groove

– Armored

– Gallery Cooled Design

Identifying A MAHLE Ring Cooled Design

Gallery Cooling Inlet

Understanding MAHLE Markings

Metric Diameter

Minimum Skirt Clearance

MAHLE Production Number

Manufacturing Codes

Front Of Engine Indicator

MAHLE Production Markings

Casting Number

Piston Number

– Inside Of Piston

– Bore Size Range

– Piston Type

– Mold Number

– Mold Modifications

Are Aftermarket Pistons Different than OE?

Sometimes!

– Gasoline replacement pistons are usually reduced compression ht.

– Diesel are more and more same as OE

Oil cooled

Profiled pin bores

Special coatings

Profiled shapes

19MAHLE Industries, Incorporated, RDN, Wolfgang Rein, Feb-2008 © MAHLE

Thermal Expansion: Piston w/o Profile

Room Temperature Operating Temperature

23MAHLE Industries, Incorporated, RDN, Wolfgang Rein, Feb-2008 © MAHLE

Piston Deformation

Temperature

Exhaust Valve Larger Deformation

ATS TS

[mm]

Temperature+Inertia+Pressure+Sideforcemax

[mm]

ATS TS

28MAHLE Industries, Incorporated, RDN, Wolfgang Rein, Feb-2008 © MAHLE

Improving Pin Bore Strength by Adjustmentsof the Pin Bore Geometry

29MAHLE Industries, Incorporated, RDN, Wolfgang Rein, Feb-2008 © MAHLE

Increase of lifetime

Due to Single Ovality in the Pin Bore

Using the Web http://www.motorenteile.mahle.com/eLIZA/mahle/query/engine/byParams

Pistons/Cylinders/Kit sets

Piston and pin dimensions in mmKH-comp heightUH-dome heightVT-valve recessMO-comb chamber diameterGL-total lengthAA-distance between pin bosses

Piston/Cylinders/Kit sets

Piston ring mounting-shown in listing ring width in mm

Cylinderbore in mm

Piston with rings,pin and clips-part number

Piston/Cylinders/Kit sets

Liner part number

Assembly part number

Piston head configuration

Piston/Cylinders/Kit sets

Liner dimensions in mm

Practice

Summary

MAHLE 224-3364

Dodge Sprinter / Mercedes Benz

Phosphate Coating

Oval Profiled Piston Pin Bore

GRAPHAL® Coated Skirt

Ni-Resist / Armored Top Ring Grove

Cooled Top Ring Design

Comes With Rings Installed

Contact Information

http://www.mahleclevite.com/askclevite.asp

http://www.mahle-aftermarket.com/C12570B3006C0D49/CurrentBaseLink/W26MNK9W508STULEN

http://catalog.mahleclevite.com/

Questions??

Bill.mcknight@us.mahle.com

800-338-8787-7895

419-689-2611