Engine - Exhaust Smoke After Extended Idle
Number 86-6 (Gasoline) - 58 Date 9/86Subject: 2.5L L4 ENGINE EXHAUST SMOKE AFTER EXTENDED IDLE
1986 FIERO MODELS WITH 2.5L ENGINE (VIN CODE R)
A condition of blue exhaust tailpipe smoke may occur during drive away, after an extended idle, on 1986 Fiero models with a 2.5L engine and manual transmission.
This condition is the result of excessive oil accumulation on the exhaust valve stems and only occurs after a prolonged idle period followed by a rapid application of the throttle.
To correct this condition replace all the exhaust valve springs with spring, P/N 3735381, and shield, P/N 10007818. As in any service procedure diagnostics are the key to an effective repair. Verification that existing intake valve seals are present and correctly installed and that casting porosity is not present should precede this procedure.
Use applicable labor operation number and labor time.