dimensions SKODA OCTAVIA 1997 1.G / (1U) 1.8 92kw Engine Workshop Manual

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Edition 08.96


Valve dimensions

Dimensions for inlet and exhaust valves
Note:
Inlet and exhaust valves must not be reworked.It is only permissible to grind them in.
Dimension Inlet valve Exhaust valve
a mm 26.80 ... 27.00 29.80 ... 30.00
b mm 5.95 ... 5.97 5.94... 5.95
c mm 104.84...105.34 103.64...104.14 °45 45
Instruction for scrapping exhaust valves
Important! Worn exhaust valves filled with sodium must notsimply be disposed of as normal scrap.
The valves have to be sawn into two parts with ahacksaw between the centre of the stem and the
valve disc. They must not come into contact withwater when carrying out this step. Once the valves
have been cut in this way, place not more than teninto a bucket filled with water. Then, stand back as a sudden chemical reaction takes place in which
the sodium in the valves combusts.
Valves which have been treated in this way canthen be disposed of with normal scrap.
Inspecting hydraulic bucket tappets
Notes:
Always replace bucket tappets complete(cannot be adjusted or repaired).
Irregular valve noises during starting are
normal.
After installing new bucket tappets, wait
about 30 minutes before starting the engine(otherwise, valves may strike the pistons);
after this, rotate crankshaft twice.
After carrying out work on the valve gear,carefully crank engine at least 2 revolutions
to ensure that no valve strikes a piston whenthe engine is started.