Service manual

181 CID (3.0L) 4 CYLINDER GM ENGINE

SERVICE MANUAL NUMBER 26

90-861329--1 MARCH 1999 Page 3A-33

8. Check installed height of valve springs using a narrow, thin scale. Measure from spring

seat to top of valve spring, as shown. If measurement exceeds specified height, install

a valve spring shim and recheck. DO NOT shim valve springs to give an installed height

less than the minimum specified.

05037

72339

Checking Valve Spring Installed Height

a-Cut Out This Portion

b-Valve Spring Installed Height

Dipstick Specifications

All Engines

NOTICE

Unit Of Measurement: U.S. inches (millimeters)

1/2

(13)

25-7/16

(646)

3/4

(19)

26-7/8

(682)

72887

41092-1 MCM

a-Full

b-Add

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