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  #1  
Old 01-21-2011, 11:05 AM
Splattman2004 Splattman2004 is offline
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Default Need help!

First off, I just traded a great running Durango for a 2001 Dodge Ram 2500 5.9L gas. I absolutely love this truck! My problems started out as a small squealing coming from the front of the motor, I figured a pulley. After leaving the house one day, I got a service engine light. I pulled into Advanced Auto and they checked it, something about engine running too cold for too long. I was told to replace the thermostat or water pump. Got it home and changed water pump, ran great for a little while. Now after the truck has been running for sometime, both the top and bottom radiator hoses are slam full of pressure, can't be squeezed! A few days later a mechanic friend of mine told me to change the thermostat so I did that day. Checked oil, it was fine. The very next day on my way home from work the truck started making a high pitched squeal, almost like the belt was going to snap. I pulled off the interstate and let it cool off, checked the oil and it was bone dry! How is this possible, fine one day gone the next?! If I drive with the heat off, the pressure builds up so much it makes the lower heater hose leak a bit. Truck has not overheat or ran low on coolant. Any ideas or help would be very much appreciated. Thanks guys!
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  #2  
Old 01-21-2011, 11:27 AM
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My first guess is that you have a blown intake plenum pan gasket. This is a common problem with the 5.2/5.9 engines and will cause excessive oil consumption but you'll almost never see it burning but it can lead to random misfires because it fouls the plugs. The repair is pretty simple - get an intake gasket set and install it (the new plenum pan gaskets are redesigned). This is also a great time to install a new cap, rotor and wires since the intake is out of the way. This link will take you to the diagnostic procedure to verify a bad plenum pan gasket. http://www.ramforumz.com/showthread.php?t=46305
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Old 01-21-2011, 11:38 AM
Splattman2004 Splattman2004 is offline
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Thanks RamTech! Would that gasket cause the excessive build up of pressure on the upper and lower radiator hoses as well? I have got to get this fixed ASAP> This is my only means of transportation. I really do appreciate you replying to my problem as quick as you did. I look forward to getting to know you guys and helping out anyway I can.
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Old 01-21-2011, 11:50 AM
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I can't see how it would. If you think the pressure is excessive, have the cap checked or replaced with one of the correct pressure rating. You might even want to have a CO2 test performed on the cooling system to rule out a leaking/blown head gasket or head problem as the source of the pressure. Having the exact pressure checked on the cooling system would also be a good idea. Has the temp gauge gone over the halfway mark at any point? A partially clogged radiator could also explain the pressure buildup with the heat off.
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Old 01-21-2011, 12:39 PM
Splattman2004 Splattman2004 is offline
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Nope, the temp gauge has been pretty normal. No overheating at all. That part didn't start until I changed the water pump. Is it possible to put a long bolt in where a short one goes and possibly closing off a water jacket or something? I have no idea. What is the correct pressure rating for this truck, my cap is rated at 16 pounds now. Thanks for all the help.
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Old 01-21-2011, 12:43 PM
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I'm pretty sure bolt placement wouldn't cause that. 16 lbs. should be correct for your truck but you do need to make sure the cap is venting at that pressure.
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Old 01-21-2011, 12:56 PM
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I will do that. And I will be doing the plenum gasket replacement this weekend. Thanks for all your advice. I will post results after the replacement is done and put a few miles on it. Thanks again
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Old 01-21-2011, 01:24 PM
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I'm guessing you can handle the removal on your own but you may find the install instructions useful.


INSTALLATION
  1. If removed, position new plenum gasket and install plenum. Tighten plenum pan mounting bolts as follows:
    • Step 1. Tighten bolts to 5.4 Nm (24 in. lbs.)
    • Step 2. Tighten bolts to 9.5 Nm (84 in. lbs.)
    • Step 3. Check all bolts are at 9.5 Nm (84 in. lbs.)
  2. Using a new gasket, install the throttle body onto the intake manifold. Tighten the bolts to 23 Nm (200 in. lbs.) torque.
  3. Apply Mopar GEN II Silicone Rubber Adhesive Sealant, or equivalent, to the four corner joints. An excessive amount of sealant is not required to ensure a leak proof seal. However, an excessive amount of sealant may reduce the effectiveness of the flange gasket. The sealant should be approximately 5 mm (0.2 in) in diameter.
  4. Install the front and rear cross-over gaskets onto the dowels Install the flange gaskets. Ensure that the vertical port alignment tab is resting on the deck face of the block. Also the horizontal alignment tabs must be in position with the mating cylinder head gasket tabs. The words MANIFOLD SIDE should be visible on the center of each flange gasket.
  5. Carefully lower intake manifold into position on the cylinder block and cylinder heads. Use the alignment dowels in the cross-over gaskets to position the intake manifold. After intake manifold is in place, inspect to make sure seals are in place.
  6. Install the intake manifold bolts and tighten as follows : INTAKE BOLTS SPECIFICATION 1 through 4 8 Nm (72 in. lbs.) in 1.4 Nm -12 in. lbs. increments 5 through 12 8 Nm (72 in. lbs.) All Bolts 8 Nm (72 in. lbs.) All Bolts 16 Nm (12 ft. lbs.) All Bolts Verify all bolts are tightened -to 16 Nm (12 ft. lbs.).
  7. Install closed crankcase ventilation and evaporation control systems.
  8. Connect the coil wires.
  9. Connect the heat indicator sending unit wire.
  10. Connect the heater hoses and bypass hose.
  11. Install distributor cap and wires.
  12. Hook up the return spring.
  13. Connect the accelerator linkage and if so equipped, the speed control and transmission kickdown cables.
  14. Install the fuel lines.
  15. Install the accessory drive bracket and A/C compressor.
  16. Install the generator and drive belt. Tighten generator mounting bolt to 41 Nm (30 ft. lbs.) torque.
  17. Install the air cleaner.
  18. Fill cooling system.
  19. Connect the negative cable to the battery.
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  #9  
Old 01-21-2011, 07:29 PM
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2001RAMSPORT 2001RAMSPORT is offline
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I have heard that it could be the plenum gasket also. My buddy replaced his and he had a similar problem but it was constant. Not day to day like yours.

Last edited by 2001RAMSPORT; 01-21-2011 at 07:33 PM.
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Old 01-21-2011, 09:52 PM
Splattman2004 Splattman2004 is offline
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Quote:
Originally Posted by 2001RAMSPORT View Post
I have heard that it could be the plenum gasket also. My buddy replaced his and he had a similar problem but it was constant. Not day to day like yours.
Are you referring to the pressure on the radiator hoses?
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