Valve timing
34
Engine M132
Introduction of the smart fortwo, Model Series 451
General
Engine M132 is equipped with mechanical cup tappets.
The mechanical stress on the cams and cup tappets
makes it necessary to check and adjust the valve clea-
rance.
The cup tappets must be measured using a micro-
meter.
Find and insert the appropriate cup tappet by refer-
ence to its markings.
The valve clearance is adjusted by exchanging the cup
tappets. These are available in various thicknesses.
P05.30-2151-00
1 Cylinder head
2 Camshaft bearing cap
3 Intake camshaft
4 Exhaust camshaft
5 Cup tappet
6 Intake valve
7 Exhaust valve
8 Valve spring retainer
9 Valve locks
10 Valve spring
11 Valve stem seal
12 Valve seat
SN_Typ 451_us.book Seite 34 Freitag, 30. November 2007 1:56 13
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