Engine - Poor Performance/Oil Economy/Coolant Loss

Bulletin No. T 84-34 File In Group 6A
Number 51
Date Jan. '84
SUBJECT: HT4100 INTAKE MANIFOLD GASKETS

MODELS AFFECTED: 1982, 1983 AND 1984 ELDORADOS, SEVILLES, FLEETWOODS AND DEVILLES


Some Cadillacs equipped with HT4100 engines may exhibit conditions of poor performance, poor oil economy and/or excessive coolant loss. These conditions may result from leaks at the intake manifold to cylinder head seal (loose intake manifold bolts). To correct these conditions without removing the intake manifold, refer to Serviceman Bulletin 83-88, Group 6A.

When performing any engine procedure that requires intake manifold removal, a new "precrushed" intake manifold gasket kit (P/N 3634584) should be used.