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Video Engine Management

Video Cylinder Head 1
Video Cylinder Head 2
Video Cylinder Head 3
Video Cylinder Head 4
Video Cylinder Head 5
Video Cylinder Head 6
Video Cylinder Head 7
Video Cylinder Head 8
Video Cylinder Head 9
Video Cylinder Head 10
Video Cylinder Head Repair
Video Cylinder Head Gasket

Video Exchange of Gases
Video Comb. Chamber Shape
Video Cam
Video Camshaft
Video Adjustable Camshaft 1
Video Adjustable Camshaft 2
Video Adjustable Camshaft 3
Video Cambelt
Video Cambelt (assembly)
Video Camshaft Timing Chain
Video Camshaft Timing Chain
Video Upright Shaft
Video Timing Diagram
Video Valves
Video Valve drive
Video Natrium Cooled Valve
Video Valve Spring
Video Valve Stem Guide
Video Valve Seat
Video Valve Seat Angle
Video Valve Stem Sealing
Video Valve Overlap
Video Valve Play Adjustment
Video Valve Contr. (desmo.)
Video Hydraulic Lifter
Video Operating Valves
Video Var. Valve Timing 1
Video Var. Valve Timing 2
Video Var. Valve Lift 1
Video Var. Valve Lift 2
Video Drawrod Engine

Video Engine Control 1
Video Engine Control 2

          A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Toothbelt mounting


The fitting of a new timing belt has become more and more complicated. Not only the large number of components which have to be removed for the change, or if the same belt is to be used again, the obligatory marking of the parts. The new belt may also have to run in a certain direction or it may be that wide or that tight, that it can hardly be fitted. Should the coolant pump be eccentrically mounted, there may possibly, be two different points where the tension is to be adjusted.


After being in operation for a longer period, the timing belt stretches a little, thus causing the valve-timing to be shifted in the "late" direction, this causes the camshaft to "chase" after the crankshaft. A cone between the camshaft-pulley and the camshaft, which can be moved, makes a compensation possible in the course of an inspection. So, the camshaft-pulley can be mounted anywhere on the camshaft. Picture 2 shows, how a camshaft pulley can be used when mounting a close fitting timing belt. The fixing bolt holding the pulley onto the camshaft is screwed out as far as possible, then the pulley is tilted enough for the timing belt to be slipped over it. Whether renewed or not, in the end the most important thing is the belt tension, which can be measured by the device shown in picture 3.

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2001-2015 Copyright programs, texts, animations, pictures: H. Huppertz - E-Mail
Translator: Don Leslie - Email:

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