NUMBER: 68-3
DATE: 2-28-68
GROUP: Engine
SUBGROUP: Cylinder Head

MODELS: Alpine, Imp, Minx, and Arrow
SUBJECT: Cylinder Head Bolt Tightness

Effective immediately, the cylinder head bolt torque loading figure has been reduced from 48 ft. lbs. to 45 ft. lbs.

Please correct the appropriate Service Manuals.

NOTE: Check tightness of bolts:

1. Cast Iron Head – HOT

2. Aluminum Head – COLD

J. J. Rivers
Manager – Service & Parts

Related posts:

1. Bulletin 67-32: Alpine V & Minx IV Modified Master Cylinder Main
2. Bulletin 67-44: Alpine V, Minx VI & Arrow New Oil Pressure Relief
3. Bulletin 68-12: Arrow & Alpine V Corrosion of Temperature Sender

NUMBER: 67-21
DATE: 2-7-67
GROUP: Engine
SUBGROUP: Engine Oil Leaks

MODELS: Imp I & II
SUBJECT: Engine Oil Leaks

Imp I Models

Recent investigation of reported oil leakage from the oil pan gasket revealed incorrect positioning of the ‘O’ ring seal after routine service.

When fitting a new element it is recommended that the following procedure is carried out:

1. Roll the ‘O’ ring part no. 9107066 over one end of the element.
2. Insert the other end of the element into the breather housing.
3. Insert bolt (with plain washer) through the breather.
4. Carefully locate the assembly in the crankcase and hold in position while tightening the bolt. This will ensure correct setting of the ‘O’ ring.

Imp II Models

Any restriction in the sealed crankcase breathing system will lead to excessive crankcase pressure build up and may in turn lead to severe oil leaks. It is recommended that the breather pipe running from the flame trap to the air cleaner be carefully checked for signs of kinking which could restrict full breathing. At the same time be sure that the breather outlet on the side of the oil filter neck is clean.

T.H. Bullard
Manager – Service & Parts

Related posts:

1. Bulletin 67-26: 1725cc Engine Oil Leaks
2. Bulletin 67-45: Alpine V Engine Vibration
3. Bulletin 67-28: Alpine V & Tiger 260 Windshield Water Leaks