Question about 1991 Mercedes-Benz 190

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I have a 1992 190 MB with 2.3 liter 4 engine. I am removing the head and want to confirm the direction rotation of the motor. I assume it is clockwise when looking at engine for radiator (front). Directions for rotation #1 cyl to tdc specify not to rotate wrong way, but fail to say what is correct way. Thanks

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Rotate crankshaft clockwise and watch where the rotor turns, whether clock wise or counter clockwise

Posted on Feb 11, 2009


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How to change head gasket

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    To avoid confusion, ALWAYS replace spark plug wires one at a time.

    The most important thing to remember about the removal and installation of a distributor, cap or spark plug cable is that all wires MUST be labelled before they are disconnected. Keep in mind that these figures depict a firing order where the distributor cap terminals are relative to EACH OTHER only and they do not necessarily depict the tower positions in relation to the rest of the engine. This is true because any distributor which has been removed and reinstalled may have been installed with the No. 1 spark plug tower at any position (360 degrees) in relation to the rest of the motor, as long as the rotor aligned to the No. 1 tower when the No. 1 cylinder was at TDC of the compression stroke (valves closed, ready for the plug to fire). As long as the remaining wires were connected in the correct firing order sequence (depending on direction of distributor rotation) the engine will run. DO NOT EVER remove more than one wire from the distributor cap at a time unless you tag ALL wires and towers to assure proper installation.


    Fig. 1: 1.9L engine . Firing order: 1-3-4-2 . Distributor rotation: counterclockwise


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    Fig. 5: 4.3L engine. Firing order: 1-6-5-4-3-2 . Distributor rotation: clockwise

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