Service manual

181 CID (3.0L) 4 CYLINDER GM ENGINE
SERVICE MANUAL NUMBER 26
90-861329--1 MARCH 1999 Page 3A-25
Cleaning and Inspection
1. Clean gasket material and sealer from engine block and cylinder heads.
2. Inspect sealing surfaces for deep nicks and scratches.
3. Inspect for corrosion around cooling passages.
4. Clean head bolt threads and engine block bolt hole threads, making sure no dirt, old oil
or coolant remains.
Installation
CAUTION
When using ribbed stainless steel head gaskets, apply a thin coating of Quicksilver
Perfect Seal to both sides of gasket. Too much sealer may hold gasket away from
head or block causing leakage. DO NOT use sealer on graphite composition head
gaskets.
1. Place head gasket in position over dowel pins.
2. Carefully set cylinder head in place over dowel pins.
3. Coat threads of head bolts with Quicksilver Perfect Seal and install finger-tight.
4. Torque head bolts to 90 lb-ft (122 Nm).
5. Install push rods, rocker arm assemblies and lifter restrictors in their original positions.
6. Torque rocker arm nuts to 20 lb-ft (27 Nm).
7. Install as outlined:
a. Intake/exhaust manifold.
b. Rocker arm cover.
c. Spark plugs.
d. Any components removed from front or rear of cylinder heads.
8. Follow procedures in SECTION 6A or 6B of this manual:
Seawater Cooled Models: Provide for adequate water supply to seawater pickup (see
SECTION 6A).
Closed Cooled Models: Refill closed cooling section (see SECTION 6B) and provide ade-
quate water supply to seawater pickup.
CAUTION
Ensure that cooling water supply is available before starting the engine.
9. Start engine, set timing, set idle speed and check for leaks.
Index