NHTSA safety investigation
NHTSA Investigation EA85018
Engineering Analysis · General Motors, LLC · ENGINE AND ENGINE COOLING
An investigation is not a finding that a defect exists.
NHTSA opens an investigation to examine whether a safety defect may exist. An open investigation is not a determination that a defect exists, and many investigations close without a recall. Investigations can, however, lead to one.
What NHTSA is examining
The agency's own description of the inquiry, quoted as published
CRANKSHAFT PULLEY BOLT
SUMMARY: GM ADMITS THERE HAS BEEN A PROBLEM AND HAS DESIGNED A MODIFICATIONKIT INTENDED TO PREVENT PULLEY BOLT FAILURES BY KEEPING THE PULLEY INPROPER ALIGNMENT WITH THE CRANKSHAFT AND THEREBY REDUCING THE BENDINGSTRESS ON THE BOLT. GM DOES NOT BELIEVE THE PROBLEM IS SAFETY RELATEDAND WILL CONDUCT A SERVICE CAMPAIGN.ANALYSIS:THE HIGHEST FAILURE RATES HAVE OCCURRED ON VEHICLES EQUIPPEDWITH AC AND PS WHICH USE A TRIPLE SHEAVE PULLEY. THE MODIFICATION KITSHOULD REDUCE THE FAILURE RATE ON THESE VEHICLES.STATUS: GM LAUNCHED A SERVICE CAMPAIGN IN FEBRUARY 1987 APPLICABLE TO185,000 T BODY VEHICLES EQUIPPED WITH TRIPLE PULLEYS. (PRODUCT CAMPAIGN84C27)EA CLOSED 9/4/87===
An investigation is a separate record from a recall and from a manufacturer communication. A manufacturer campaign to repair a safety defect or a failure to meet a federal safety standard.
Investigation details
Identifiers, dates and outcome as recorded by NHTSA
- Action number
- EA85018
- Investigation type
- Engineering Analysis (EA)
- Status
- Closed
- Manufacturer
- General Motors, LLC
- Component
- ENGINE AND ENGINE COOLING
- Opened
- Mar 13, 1985
- Closed
- Sep 4, 1987
- Associated recall campaign
- None recorded
Vehicles named in this investigation
15 model years across 2 models
Being named here means NHTSA included the vehicle in the scope of its inquiry. It is not a statement that these vehicles have a defect.