Owners of the Jeep Liberty equipped with a 3.7 liter engine have complained of head gasket failure due to overheating. The overheating is caused by a loss of coolant that is related, among other things, to engine oil conditions. A common complaint of 3.7 owners includes finding a "brown sludge" in the Liberty's oil filler neck where healthy oil should be. The radiator often develops a crack in the drivers side upper tank. It is usually small and almost not discernible to the naked eye. Over time antifreeze will leak from the Jeep and into the motor, destroying engine bearings and causing the head gaskets to fail. If not intercepted early, the entire motor may need replaced. The average cost to repair a head gasket on the Liberty is $990-$1,200 in parts and labor. Show accountCircle Steve V November 5, 2020 How many miles and did vehicle see regular maintaince . accountCircle Mike August 26, 2022 Howard! Driver or passenger side on the 2 blown Liberty head gaskets? accountCircle Howard August 8, 2022 I have had 2 Jeep Liberty’s, my brother one. One was 05, other 2 were 2010. All these Jeeps had a blown head gasket!! I guess that’s why they don’t make them anymore. You can bet I won’t!! accountCircle Winston C. April 9, 2020 Some potential problems caused by a bad head gasket in a 2007 jeep liberty (kj) 3.7 L powertech v6 are coolant leaking, overheating engine and fouled spark plugs. The Questions and Answers on this page are the statements and opinions of their respective authors and not VehicleHistory.com. VehicleHistory.com does not research or authenticate any of the Answers provided. Hello all. I am a first timer jeep owner. I will be replacing both sides just to be safe. *This post will be edited on a continuous basis as I make progress on it* Parts to be replaced Tools required: 5/16" 1/4" socket Manual and supplemental instructions: Step one Disconnect negative battery terminal. Removal of air intake system Removal of accessory belt, alternator, and AC compressor: Alternator removal: AC Compressor Removal Removal of Spark Plug Coil Packs: Using a pair of pliers, carefully compress spring on the hose running from the
coolant reservoir to the radiator. The coils are held in place by one 10mm nut. Disconnect wire from coil pack. (Not sure if coil pack location matters, so just as a precaution, I am marking which one came from which cylinder). Time Checkpoint: 55 minutes Driver Side Exhaust Manifold Removal SEE POST 6 Remove heat shield which is held on by 4 10mm nuts. Bottom nut closest to the firewall requires a small 1/4" drive and 10mm deep well socket. Passenger Side Exhaust Manifold Removal SEE POST 6 Same as driver side. Can reach bottom 10 mm nut for heat shield from underneath car if necessary. I highly recommend a 10mm impact socket to break the nuts free. I rounded one off by not doing so but was able to beat a 3/8" impact socket on. Separate exhaust pipe at catalytic converter flange This is simple. Take a small sawzall and cut the 4 bolts (2 each flange). Be aware of the tension spring flying off Intake Manifold Removal 7 10mm studs and one 10mm nut. Remove 10mm bolt holding the check engine oil tube to exhaust manifold. Remove 4 5/6" nuts from the fuel rail. Wiggle that manifold out of there. Time Checkpoint: 3 hours 15 minutes Fuel Rail Removal Disconnect fuel rail from fuel line on the driver side of the engine. Undo security clips on injector electrical connectors. Remove electrical connectors. Using a flat blade screw driver, rotate and pull the clips that secure the injectors to the fuel rail. Gently wiggle the fuel rail off of the injectors. Remove wire harness over valve cover Back out the 10 10mm screws holding it on. Gently pry valve cover off. DO NOT PRY ON THE VALVE COVER GASKET. Crankshaft damper (Harmonic Balancer removal) Need to rent a harmonic balancer puller from autozone or advance auto, etc. To remove the crankshaft bolt, I used an impact wrench followed by a breaker bar. Need to stick a 1" wrench in the harmonic balancer to keep it from rotating. Oil Filler Removal Held on by 3 8mm bolts and 1 8mm stud. Power Steering Pump Held on by 3 13mm bolts. (13mm socket with extension to go through the holes in the pulleys) Timing Chain Cover Removal Held on by 14 bolts and one stud. Need to remove the serpentine belt tensioner (2 bolts) and power steering pump (3 bolts). If I recall correctly, the timing chain cover bolts are 15mm. Remove in order shown
Cylinder Head Removal The first step in this is to remove the timing chain off of the sprocket. On the driver side, I had to remove the camshaft sprocket to get enough slack. Caution: It is imperative that the crankshaft timing mark is aligned with the TDC mark on the timing chain cover and that both V6 marks are at the 12 o'clock positions. Mark the chains in several spots Once you get the sprocket and chain out of your way, the head is held on by 8 15mm bolts and 4 10mm bolts. Cylinder Head Torque Sequence
For install Tighten 1-8 to 20 ft lbs. Then check in the same sequence to make sure the torque is correct. Tighten 9-12 to 10 ft lbs. Turn 1-8 90 degrees. Turn 1-8 90 degrees for a second time, then torque 9-12 to 20 ft lbs. Torque Sequencing and Specs Timing Chain Cover: Tighten to 40 ft lbs Oil Filler: 9 ft lbs Is it worth fixing a head gasket?If your head gasket leak has caused this problem you are almost always better off replacing the whole engine as a new head gasket will stop the leak but bearing damage has probably already been done.
How long does it take to replace a head gasket?Replacing the gasket can take anything from six hours to a few days, depending on the severity of the failure. A blown head gasket is one of the biggest failures your car can suffer, and to fix it properly takes time.
How much does a head gasket cost for a Jeep Liberty?Jeep Liberty Head Gasket Replacement Cost Estimate. The average cost for a Jeep Liberty head gasket replacement is between $1,468 and $1,665. Labor costs are estimated between $753 and $950 while parts are priced at $715.
How much to replace a head gasket in a Jeep?The Best in Auto Repair
The average cost for a Jeep Wrangler head gasket replacement is between $1,515 and $1,716. Labor costs are estimated between $763 and $962 while parts are priced between $752 and $754. This range does not include taxes and fees, and does not factor in your specific model year or unique location.
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