MY '91 850 IS AT THE STEALER BECAUSE THE WATER PUMP WENT OUT. THE WATERPUMP,OIL PUMP,OVERFLOW TANK,FAN AND FAN CLUTCH HAVE BEEN REPLACED.THE OIL PAN WAS DROPPED. OIL AND ANTIFREEZE CHANGED. STILL THE ENGINE WILL NOT HOLD OIL PREASSURE BELOW 3000 RPM AND THE IDLE IS ROUGH FURTHERTHERE IS A SLOW COOLANT LEAK AT THE REAR OF THE ENGINE ALSOTHERE IS A SUCKING AND KNOCK ALMOST LIKE A VACUMN LEAK TRYING TO CLOSE SOMETHING.
DOES ANYBODY HAVE ANY IDEAS WHAT THE PROBLEM MAY BE?