Investigation EA85018: 1976–1985 Chevrolet Chevette

Status

CLOSED

Opened

Mar 13, 1985

Closed

Sep 4, 1987

Model years

1976–1985

Subject

Crankshaft pulley bolt

Component: Engine and engine cooling

Summary

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 NHTSA investigation looks into whether a safety defect exists. Opening one is not a finding. Outcomes can include a recall, closure without action, or further inquiry.

Model years covered

• 1981 Chevrolet Chevette5 complaints