Leaks coolant from driver side of engine where steel water pump line bolts to engine. replaced 0-ring on driver side but not on water pump side. Could the steel tube that goes thru the engine have a hole in it causing coolant to leak? 1998 Dodge Caravan 3.0 V-6
If the o-ring on the water pump side had a bad o-ring could coolant flow out the driver side where it bolts to side of engine???
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Re: Water Pump leakes from steel tube.
Yes it could, it's a round "O" ring and where it decides to leak could spray anywhere. I seem to remember a bypass hose connection on that tube also, right above water pump, if that's right, have you checked that for possible leak? As far as tube having a leak under intake, yes I've heard of that too. Maybe a pressure test with engine off, will give you a better way of looking close for the source of leak.
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Timing beltAlternator brace from the
water pumpTiming belt rear coverWater pump mounting
boltsWater pump, gasket and
Install or connect the following:
New O-ring on the water inlet
pipe. Coat the O-ring with water or coolant. Do not allow oil or other grease to
contact the O-ring.Water pump to the engine
block, with new gasket. Torque the mounting bolts to 10 ft. lbs. (13 Nm)Alternator brace on the water
pump. Torque the brace pivot bolt to 17 ft. lbs. (24 Nm).Timing belt rear coverTiming beltRemaining components
Refill the engine with coolant.
Connect the negative battery cable, start the engine and check for
Place the water pump gasket (O-ring) on the block and install the pump. Tighten the mounting bolts evenly to 11 ft. lbs. (15 Nm).Install the timing belt covers, making sure they are properly seated and not rubbing on the belt or other moving parts.Install a new seal (O-ring) on the dipstick tube and lightly coat it with engine oil. Remove the plug and install the dipstick tube and dipstick; secure the mounting bolt to 82 inch lbs. (9 Nm).
Using a new O-ring, install the inlet pipe to the water pump. Attach the clamps and bolts to hold the pipe in place and tighten to 7-9 ft. lbs. (9-12 Nm). Connect the water inlet and water bypass hoses to the inlet pipe. Install the water pump pulley and temporarily tighten the four pulley bolts. Install the drive belts on all the pulleys and adjust all of them to the correct tension. With the belts in place and adjusted, the water pump pulley will now resist turning. Tighten the pulley bolts to 16-18 ft. lbs. (22-24 Nm). Install the front engine mount (mounting insulator). Confirm that the draincocks are closed on the engine block and radiator. Refill the engine with coolant. Reconnect the negative battery cable. Start the engine and check for leaks.
The water pump can be removed and installed without discharging the air conditioning system (if equipped).
Disconnect battery negative cable.
Drain cooling system. Refer to Draining and Filling found under Cooling System, Service and Repair.
Do not waste reusable coolant. If solution is clean, drain coolant into a clean container for reuse. WARNING: CONSTANT TENSION HOSE CLAMPS ARE USED ON MOST COOLING SYSTEM HOSES. WHEN REMOVING OR INSTALLING, USE ONLY TOOLS DESIGNED FOR SERVICING THIS TYPE OF CLAMP, SUCH AS SPECIAL CLAMP TOOL (NUMBER 6094). SNAP-ON CLAMP TOOL (NUMBER HPC-20) MAY BE USED FOR LARGER CLAMPS. ALWAYS WEAR SAFETY GLASSES WHEN SERVICING CONSTANT TENSION CLAMPS. CAUTION: A number or letter is stamped into the tongue of constant tension clamps. If replacement is necessary, use only an original equipment clamp with matching number or letter.
Remove upper radiator hose clamp and hose at radiator.
The thermal viscous fan drive is attached (threaded) to the water pump hub shaft. Remove fan/viscous fan drive assembly from water pump by turning mounting nut counterclockwise as viewed from front. Threads on viscous fan drive are RIGHT HAND. A Snap-On 36 MM Fan Wrench (number SP346 from Snap-On Cummins Diesel Tool Set number 2017DSP) can be used. Place a bar or screwdriver between water pump pulley bolts to prevent pulley from rotating. Do not attempt to remove fan/viscous fan drive assembly from vehicle at this time.
6. If water pump is being replaced, do not unbolt fan blade assembly from thermal viscous fan drive.
Remove fan shroud attaching hardware (two bolts at bottom-two clips at top).
Remove fan shroud and fan blade/viscous fan drive assembly from vehicle as a complete unit.
After removing fan blade/viscous fan drive assembly, do not place thermal viscous fan drive in horizontal position. If stored horizontally, silicone fluid in viscous fan drive could drain into its bearing assembly and contaminate lubricant.
Do not remove water pump pulley bolts at this time.
Remove accessory drive belt as follows: The drive belt is equipped with a spring loaded automatic tensioner. Relax tension from belt by rotating tensioner clockwise (as viewed from front). When all belt tension has been relaxed, remove accessory drive belt.
12. Remove four water pump pulley-to-water pump hub bolts and remove pulley from vehicle.
Remove lower radiator hose clamp and remove lower hose at water pump.
Remove heater hose clamp and heater hose from heater hose coolant return tube.
Loosen heater hose coolant return tube mounting bolt and remove tube from water pump. Discard the old tube O-ring.
Remove seven water pump mounting bolts.
Loosen clamp at water pump end of bypass hose. Slip bypass hose from water pump while removing pump from vehicle. Discard old gasket. CAUTION: Do not pry water pump at timing chain case/cover. The machined surfaces may be damaged resulting in leaks.
Clean gasket mating surfaces.
Using a new gasket, install water pump to engine as follows: Guide water pump nipple into bypass hose as pump is being installed. Install water pump bolts. Tighten water pump mounting bolts to 40 Nm (30 ft. lbs.) torque.
Position bypass hose clamp to bypass hose.
Spin water pump to be sure that pump impeller does not rub against timing chain case/cover.
Install a new O-ring to the heater hose coolant return tube. Coat the new O-ring with antifreeze before installation.
Install coolant return tube and its mounting bolt to engine. Be sure the slot in tube bracket is bottomed to mounting bolt. This will properly position return tube.
Connect radiator lower hose to water pump.
Connect heater hose and hose clamp to coolant return tube.
Install water pump pulley. Tighten bolts to 27 Nm (20 ft. lbs.) torque. Place a bar or screwdriver between water pump pulley bolts to prevent pulley from rotating.
Relax tension from belt tensioner. Install accessory drive belt.
CAUTION: When installing the serpentine accessory drive belt, the belt must be routed correctly. If not, engine may overheat due to water pump rotating in wrong direction. Refer to Illustration above for correct belt routing. The correct belt with correct length must be used.
Position fan shroud and fan blade/viscous fan drive assembly to vehicle as a complete unit.
Install fan shroud.
Install fan blade/viscous fan drive assembly to water pump shaft.
THE 2.4L AND 2.5L ENGINES.YOU HAVE TO SAFELY RAISE VECHICLE SUPPORT IT USING JACK STANDS.YOU HAVE TO REMOVE THE RIGHT HAND SPLASH SHIELD.THEN LOOSEN WATER PUMP PULLEY BOLTS LEAVE DRIVE BELT IN PLACE TO KEEP WATER PULLEY FROM TURNING WHILE LOOSEN PULLEY BOLTS.THEN YOU HAVE TO MOVE AC COMPRESSOR DONT DISCONNECT ANY REFRIGERANT LINES.JUST SET IT ASIDE THE ALTERNATOR AND ITS MOUNT ALSO HAS TO MOVED.THEN YOU ARE AT WATER PUMP.NOW THE 3.5L ENGINE WATER PUMP IS IN A TOUGH SPOT.YOU HAVE TO REMOVE ENGINE SPLASH SHIELD.REMOVE THE SUBFRAME BRACKET FROM THE RIGHT SIDE OF THE SUBFRAME ASSEMBLY. REMOVE THE INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM FROM THE ENGINE COMPARTMENT.REMOVE THE IPDMER UPPER COVER AND HARNESS COVER RELEASE THE TWO CLIPS.DISCONNECT THE ELECTRICAL CONNECTORS AND LIFT THE ASSEMBLY FROM THE CASE.REMOVE THE RADIATOR SHROUDS REMOVE THE DRIVE BELTS.REMOVE THE ENGINE COOLING FAN.REMOVE THE RADIATOR AND THE COOLANT RESERVOIR.REMOVE THE IDLER PULLEY AND THE POWER STEERING AND ALTERNATOR ADJUSTMENT BRACKETS.REMOVE THE FRONT ENGINE MOUNT.REMOVE COOLANT DRAIN PLUG FROM THE WATER PUMP SIDE OF THE ENGINE BLOCK.REMOVE CHAIN TENSIONER COVER AND THE WATER PUMP COVER FROM THE ENGINE FRONT COVER.REMOVE THE CHAIN TENSIONER.PULL THE LEVER DOWN TO RELEASE THE PLUNGER STOPPER TAB.INSERT A STOPPER PIN INTO THE TENSIONER BODY HOLE TO RETAIN THE LEVER IN THE RELEASED.NO CHAIN TENSION POSITION.MOVE THE PLUNGER INTO THE TENSIONER BY PRESSING THE CHAIN GUIDE AND PUSHING WITH A SCREWDRIVER.MAKE A GAP BETWEEN THE WATER PUMP GEAR AND THE TIMING CHAIN BY ROTATING THE CRANKSHAFT PULLEY 20 DEGREES COUNTERCLOCKWISE.REMOVE THE THREE WATER PUMP MOUNTING BOLTS.INSTALL 2 BOLTS SIZE M8 1.25 X 50 MM INTO THE WATER PUMP BOLT HOLES AND TIGHTEN THEM EQUALLY UNTIL THEY BOTTOM AGAINST THE CHAIN COVER.IT WILL BE NECESSARY TO ROTATE THE WATER PUMP SLIGHTLY TO ALLOW THE BOLTS TO DRIVE AGAINST THE REAR TIMING CHAIN CASE COVER INSTEAD OF THE BOLT HOLES.REMOVE THE WATER PUMP.CLEAN THE SEALANT FROM THE MATING SURFACE AND REPLACE THE O-RINGS.INSTALL THE OUTER O-RING WITH THE WHITE PAINT MARK FACING THE FRONT OF THE ENGINE AND THE INNER O-RING BLACK NEXT.APPLY A LIGHT AMOUNT OF OIL TO THE O-RINGS.TIGHTEN THE WATER PUMP BOLTS TO 62 - 89 INCH POUNDS.TIGHTEN WATER PUMP BOLTS EVENLY DONT OVER TIGHT OR YOU WILL DAMAGE WATER PUMP AND HAVE LEAKS.REINSTALL THE POWER STEERING AND ALTERNATOR ADJUSTMENT BRACKETS AND ANY OTHER COMPONENTS REMOVED FOR ACCESS TO THE WATER PUMP.REFILL THE COOLING SYSTEM.RUN THE ENGINE AND CHECK FOR LEAKS.YOU NEED TO BUY THE HAYNES REPAIR MANUAL.SO THE PHOTOS WILL HELP YOU WHEN REMOVING AND INSTALLING WATER PUMP.
That sounds like the heater bypass tube. On the end of the tube going into the water pump is an o-ring. Pull out the tube, clean it real good, put a new o-ring on it. Clean the hole well that it goes in. Then I will put a slight amount of silicone around the o-ring. That helps it go back together and fills any imperfections.
Hope this helps you.