Jeep Wrangler Sport 2010 Manual page 90

Fig. 117: CYLINDER BORE CROSS-HATCH PATTER
Courtesy of CHRYSLER LLC
1 - CROSS-HATCH PATTERN
2 - 40°-60°
1. Used carefully, the cylinder bore resizing hone, recommended tool C-823 or equivalent, equipped with
220 grit stones, is the best tool for this honing procedure. In addition to deglazing, it will reduce taper and
out-of-round as well as removing light scuffing, scoring or scratches. Usually a few strokes will clean up
a bore and maintain the required limits.
2. Deglazing of the cylinder walls may be done using a cylinder surfacing hone, recommended tool C-3501
or equivalent, equipped with 280 grit stones, if the cylinder bore is straight and round. 20-60 strokes
depending on the bore condition, will be sufficient to provide a satisfactory surface. Use a light honing
oil. Do not use engine or transmission oil, mineral spirits or kerosene. Inspect cylinder walls after
each 20 strokes.
3. Honing should be done by moving the hone up and down fast enough to get a cross-hatch pattern. When
hone marks intersect at 40-60 degrees (2), the cross hatch angle is most satisfactory for proper seating of
rings.
4. A controlled hone motor speed between 200-300 RPM is necessary to obtain the proper cross-hatch
angle. The number of up and down strokes per minute can be regulated to get the desired 40-60 degree
angle. Faster up and down strokes increase the cross-hatch angle.
5. After honing, it is necessary that the block be cleaned again to remove all traces of abrasive.
CAUTION: Ensure all abrasives are removed from engine parts after honing. It is
viernes, 1 de octubre de 2021 05:18:31 p. m.
2010 Jeep Wrangler Sport
2010 ENGINE 3.8L - Service Information - Wrangler
recommended that a solution of soap and hot water be used with a
brush and the parts then thoroughly dried. The bore can be
considered clean when it can be wiped clean with a white cloth and
cloth remains clean. Oil the bores after cleaning to prevent rusting.
Page 90 © 2011 Mitchell Repair Information Company, LLC.