911 Carrera 2 Coupe F6-3600cc 3.6L SOHC (1990)
Intake Manifold: Technical Service Bulletins
Camshaft Housing and Manifold - Revised Sealing
Group
1
Number
9403
Model
6 Cyl.
Part Identifier
1503
February 8, 1994
Subject:
Camshaft Housing and Manifold Sealing
ATTENTION: Service Manager / Service Technician
Models Affected:
911 Carrera 2/4, 911 Turbo 3.6
Concern:
Attaching the camshaft housing to the cylinder heads and attaching the intake manifolds. As of February 2, 1993 production, the attaching of the
camshaft housings to the cylinder heads has changed from studs/nuts to cap-head bolts (Allen bolts).
General Information:
For the normally aspirated engine the 8x55 bolts for the cam housing are microencapsulated for additional sealing. For the 911 Turbo 3.6, these same
bolts are sealed using high temperature RTV sealer. For both engine types, the 8x3O bolts of the cam housings are installed without sealer.
The intake manifolds of the normally aspirated engines are now attached using 6x35 cap-head bolts without additional sealing.
Repair Procedure:
1.
During repairs, the cap-head bolts can be installed in all 3.6 liter engines normally aspirated and turbo charged.
2.
When removing and installing one or more cylinder head(s), the cap-head bolts should be used for reassembly.
3.
It is not permitted to mix cap-head bolts with studs during assembly of the cam housings.
4.
The 8x55 cap-head bolts for the camshaft housing as obtained through the Parts Department are the same for turbos and normally aspirated