Cherokee L4-150 2.5L VIN U 1-bbl (1984)
Cylinder Head Bolts: Customer Interest
Cylinder Head Bolts - Improperly Hardened/Broken
MARCH 1984 000 170
CHEROKEE/WAGONEER 70 SERIES
13E
ENGINES
Attention: Workshop, Parts Department
BROKEN CYLINDER HEAD BOLT
Information
Some bolts used on the spark plug side of the cylinder head in 2.46L four-cylinder engines, were improperly hardened and may break under the bolt head
or in the bolt thread area. The engines with suspect bolts are coded as follows:
Four-Cylinder - 310U06 through 310U14
Fig. 1 Bolt Tightening Sequence and Torque Specifications
Whenever a broken bolt is found, all of the bolts on the spark plug side of the head (Fig. 1), should be replaced with new bolts, 400 6593. Four-cylinder
engines require five bolts.
Be sure to follow the bolt tightening sequence and torque specifications indicated in Figure 1 when replacing the bolts.
Fig. 2 Engine Code Location
NOTE:
The engine code is stamped on a machined surface on the distributor side of the block (Fig. 2).
Filing Instructions
Record this I.S. Note on page B-19 and file it in your M.R. 244 binder.
