EL Camino V6-229 3.8L VIN 9 (1984)
Valve Guide Seal: All Technical Service Bulletins
Intake Valve Seals - Abnormal Oil Consumption
Number:
83-I-38
Section:
6A (VI)
Date:
Dec., 1983
Subject:
INTAKE VALVE SEALS FOR 3.8L ENGINES
Model and Year:
1978-84 MONZA, MALIBU, MONTE CARLO AND EL CAMINO
TO:
ALL CHEVROLET DEALERS
This revises Bulletin 83-I-38 issued January, 1983 and reissued February, 1983. Previously issued copies should be destroyed.
LARGER DIAMETER SEAL
SMALLER DIAMETER LATE TYPE SEAL
A new smaller diameter intake valve seal went into production approximately December 1, 1982, on 3.8L engines (see illustration). The new seal will
reduce the possibility of the seals lifting off the valve guide, which could result in abnormal oil consumption or detonation.
If either of these conditions is encountered, the new seals, P/N 25518390, should be installed. The seals should also be installed on the above engines
whenever engine coolant (ethylene glycol), which can deteriorate the valve seal, is present in the engine oil or internal coolant loss is suspected. Since
the cylinder head valve guide outside diameter was reduced to accept the new seal, it will be necessary to rework the valve guide to the new smaller
diameter prior to its installation.
This can be done by removing the cylinder head and using a valve guide cutting tool such as the KL1440, or equivalent, which will reduce the valve
guide outside diameter to the new dimension, and is available from the following address:
*K-Line Industries, Inc.
315 Garden Avenue
Holland, MI 49423
Toll Free 1-800-253-2648
(Michigan Only 1-800-632-4595)
NOTICE:
An exchange program for badly worn or used tools (less pilot) is also available through K-Line Industries. Price of rebuilt tool (P/N
1443ADRT) is $17.50 plus postage. This price is based on manufacturers ability to rebuild returned unit.
Instructions for Machining Guides
1.
Remove cylinder head and valve assemblies as outlined in the service manual.