The 325I first requires the coolant to be drained. Please dispose of or recycle the old coolant, thanks. Then the radiator hoses can be taken off and inspected. Remove the fan and fan clutch as an assembly, it is a left hand thread and requires a 36mm thin open end wrench and a holding tool for the pulley. If you do not know the age of the timing belt, replace it and the tensioner at this time, I would replace it for the peace of mind, it is relatively cheap insurance and if you do it now you wont have to wonder if you did it or if it has been replaced. The next steps are for replacement of the timing belt with the water pump. Remove the six bolts holding the crank pulley on and remove the pulley. Remove the distributor cap and rotor and the covers for the timing belt. Turn the crank to line up the timing marks and/or bring cylinder#1 to TDC and line up the cam pulley with its timing mark, it is at the 4 o'clock position on the head. Remove the tensioner and the belt. Remove the water pump, there are 3 bolts, clean off the old gasket and install the new pump. Replace the timing belt and tensioner, making sure to roll the motor over(by hand, not with the starter) and triple check the timing marks. Reassemble it in reverse order and fill with water/coolant mixed 50/50 with the bleeder screw at the thermostat housing open, close it when it stops bubbling air out. If you do not feel comfortable with this operation then may I suggest a Robert Bentley repair manual, I recommend them highly. Go to Amazon. Com for yours.
Sunday, April 19th, 2009 AT 5:33 PM