Cutlass Supreme V8-307 5.0L VIN Y 4-bbl (1985)
Figure 1
The following information will supplement Dealer Technical Bulletin 86-T-13 dated January 27, 1986.
Intake manifold gasket deterioration as described in Dealer Technical Bulletin 86-T-13 may result in corrosion pitting of the aluminum intake manifold.
It is not necessary to replace the intake manifold for this condition. Use a 80% aluminum epoxy such as Devcon "F" or equivalent to fill the corrosion
pits in the aluminum intake manifold. Refer to service procedure below.
SERVICE PROCEDURE:
1.
Remove intake manifold.
2.
Thoroughly clean corroded area using a wire wheel to remove all aluminum oxide.
3.
Remove all remaining grit and dust with compressed air, or thoroughly wash in a solvent.
4.
Mix epoxy with hardener according to instructions. Apply with a two inch putty knife or similar flat straight edged tool. A heat gun can be used to
shorten curing time.
5.
After hardening, smooth surface down to its original machined surface using a single cut flat mill file. Observe the voids and fill if necessary.
Surface may be smoothed further using 320 grit sandpaper with a sanding block.
6.
IMPORTANT: Before reinstalling the intake manifold, it is essential that sealer, part number 1050026 or equivalent be applied to both sides of the
intake manifold gasket where it contacts the cylinder head and intake manifold. Refer to Figure 1.
Parts are currently available through GMSPO.
For warranty purposes use Labor Operation J0200. One (1.0) hour straight time is available without zone authorization, for the above service procedure.
