Service manual

181 CID (3.0L) 4 CYLINDER GM ENGINE
SERVICE MANUAL NUMBER 26
90-861329--1 MARCH 1999 Page 3A-29
3. Ream hole for oversize stud with Tool J-5715 for .003 in. oversize or Tool J-6036 for .013
in. oversize.
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a
a-Reamer Tool J-5715
IMPORTANT: Do not attempt to install an oversize stud without reaming stud hole.
4. Coat press-fit area of stud with Perfect Seal. Install new stud, using Tool J-6880 as a
guide. Gauge should contact head.
Valve Guide Bore Repair
IMPORTANT: Be sure to measure valve stem diameter of both the intake and exhaust
valve, as valve stem diameter may or may not be the same for both valves.
If .015 in. oversize valve stems are required, ream valve guide bores for oversize valves,
as follows:
1. Measure valve stem diameter of old valve being replaced and select proper size valve
guide reamer from chart below.
2. Ream valve guide bores, as shown.
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3. Remove the sharp corner created by reamer at top of valve guide.
Index