Water pump and timing belt

You don't have to replace it but you have to take the belt off to remove the water pump for the extra $30.00 i would recomend changing the belt too, unless the belt has been changed less then 20,000 miles ago .

can be that timing belt is rongly fitted or feul lines is not fitted corect way around

if you have a coolant leak under the car at the end of the motor where the pulleys are then its an indication it is the water pump leaking,if it is the water pump is behind the timing cover and timing belt assembly.this means every thing between the engine block and the inner fender has to be rimoved to gain access to the water pump.when the water pump is changed you should change the timing belt and tensioner to eliminate any further possible problem happening behind the cover also change the thermostat as you said it overheated.my advice to you is if you are not very mechanically inclined to have an experiance person perform this job as if you don`t get the timing of the camshafts and crankshaft correct you can cause engine damage.

You are correct, the timing belts are set incorrectly. Google the correct installation steps and follow the procedure exactly. The usual issues are that the oil pump and cams are out of phase. The cam sprockets can and do move a tooth or two when loose. The top balance shaft gets out of phase as well (see the small belt).

To change the water pump on the 1.8 or 2.0 4cyl is a complex project. The water pump is driven by the timing belt which means you have to remove the timing belt cover. Once youve done that you will need to release the tension on the timing belt make sure you have aligned the timing marks on both the camshaft and crankshaft sprockets before loosing the timing belt and be sure you do not move them while the timing belt is off and be sure they do not move while putting the belt back on. The tensioner will have to be locked down either before or after taking it out if after you will need to compress the tensioner and stick a small drill bit through the holes that way when you install it back all you have to do is pull the bit out and the tensioner does the rest. Once the belt is loose then you can remove the water pump and install the new one.

been a long time but i think the 86 has a timing chain or gears so no you should not have to remove to change water pump

I would go to auto zone and get a diagram and the timing belt and do it yourself and the water pump (no it does not have to be changed everytime the timing belt is changed but if the car has over 60,000miles then it is best to change them both) it is not that hard especially if the car is not out of time just make sure you disconnect the negative side of the battery

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I think that would be the cam belt tensioner pulley.

hey if you changed all of that, i think the problem is the waterpump, my car had that problem and finally i found that that was leaking from the waterpump, but very carefull if you change it because if you move the timing belt the wont start. a mechanic charges around $225.00 to fix the water pump, the water pump is around 42.00 to 50.00 don't pay more than that.