I have a oil leak coming from the crankshaft the bolt is tight , I did install a new oil pump new waterpump timing belt truck runs fine but I can't seem to understand why oil is leaking from there any help would be appreciated thanks
You might want to replace your PCV valve if it hasn't been done recently. You shouldn't have any leaks from the oil pump since the seal was probably new when you replaced it. Pressure can build up inside the motor and if the PCV isn't working properly it creates pressure behind the engine oil seals. With the engine running, you can pull the dipstick and see if a piece of paper will stay vacuum stuck to the oil stick tube. The other thing to check is to see that the PCV hose pulls a good vacuum with the engine idling. Sometimes the line gets partially clogged and then vacuum into the engine isn't strong enough.