Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSOLDSMOBILE1989DELTA 88 V6-3800 3.8LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSSPARK PLUG - REVISED DESIGN
1989 Oldsmobile Delta 88 V6-3800 3.8L
Spark Plug - Revised Design
1989 Oldsmobile Delta 88 V6-3800 3.8LSECTION Spark Plug - Revised Design
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NUMBER: 91-T-82
CORP.REF.NO: 106501R
DATE: April 1991
SECTION: 6D
SUBJECT:
NEW DESIGN SPARK PLUG FOR 3800 AND 3800 T.P.I. (VIN C & L) ENGINES
MODELS/YEARS:
1989-91 EIGHTY-EIGHT, NINETY-EIGHT, TORONADO
This bulletin is to inform technicians of a change in the service replacement spark plug for the 1989-91, Eighty-Eight models, and 1989-90 Ninety-Eight and Toronado models with the 3800 (VIN C) engine, and 1991 Ninety-Eight and Toronado models with the 3800 T.P.I. (VIN L) engine.
When servicing vehicles listed above, technicians may use the new service replacement spark plug R45LTS6, service package number 5614224.
Engines produced after March 1, 1991 will have the new R45LTS6 spark plug installed. When replacing spark plugs in vehicles with the old design spark plug number R44LTS6, all spark plugs may be replaced with the new service spark plug R45LTS6.
NOTE: Do not mix the two spark plug numbers in a vehicle.
As service stock of the R44LTS6 spark plug is exhausted, stock will be replaced with the new spark plug R45LTS6.
Parts are currently available from GMSPO.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.