Camshaft Drive Belt (Turbo) - Revised Part & Adjustment
Subject:Camshaft Drive Belt
Model
944, 944 Turbo
Part Identifier
1524
Group 1
Number
8525
A new camshaft drive belt, Part #944.105.- .157.04 is being installed as of Oct. 30 ,1984 production, Engine #43FOO071, 43F2OO66.
Only this new version, which can also be installed retroactively, will be available after depletion of existing inventories. (944.105- .157.03)
Belt Tension Values
With the introduction of the new camshaft drive belt the tension value, of both the new belt (944.105.157.04) and the old belt (944.- 105.157.03) in new condition, was increased to 4.0 - 0.3 scale units. This initial higher value will assure the desired 2.7 - 0.3 scale units after about 2,000 miles.
Belt Tension Checking and Adjustment Values
Repair Information
Camshaft Drive Belt Checking and
Adjusting Procedure
The drive belt tension may only be checked and adjusted on a cold engine, ambient temperature about 20'C/68-F.
Checking
1. Turn crankshaft clockwise until TDC mark on camshaft drive gear is lined up with cast mark in camshaft drive belt housing, Check condition of the drive belt teeth while turning the crankshaft, and the tensioning roller for wear and damage.
2. TDC marks on flywheel and casting boss on bell housing must also be aligned.
3. Turn engine counterclockwise approximately 10' on the crankshaft, which is equal to approx. 1.5 teeth on the camshaft gear.
4. Prepare Special Tool 9201 for checking. Pull out lockpin on special tool and slide out the gauge pin completely. Align tell-tale needle with gauge needle.
5. Slide Special Tool 9201 on to camshaft drive belt. Push in gauge tip (arrow) slowly until lockpin engages and read value shown on the dial gauge.
Slide must have full contact on belt. The special tool must not be turned or moved on the belt throughout the entire checking procedure.
Adjusting
Turn eccentric ounterclockwise to lighten the tensioning roller.
Very Important!
Always loosen the nut on the tensioning eccentric when adjusting belt tension. If the tensioning eccentric is turned prior to loosening,the stud will be bent, resulting in the belt running at an angle and causing excessive wear.
2. Tighten mounting nut to the specified torque (45 Nm / 32.5 ft. lbs.), while holding the tensioning eccentric stationary.
3. Turn engine clockwise two full turns and align TDC mark on camshaft drive gear with cast mark in camshaft drive belt housing.
Turn engine counterclockwise approx. 10 crankshaft degrees, or 1.5 teeth on the camshaft gear, from aligned position.
4. Recheck tension of drive belt and,if necessary, correct.