Question about 2002 Jeep Wrangler

1 Answer

Why is my oil pressure running high after my jeep overheated?

My jeep overheated on my way home, pulled over, and the radiator is cracked. Filled it up and headed out. Temperature was then fine on the ride home; however, the oil pressure kept pushing 80. I had to put the car in neutral in order for it drop. I am replacing the radiator; however, I would like to know why the oil pressure was running high?

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Filmmaker:

    Uploaded 5 video answers.

  • Expert
  • 141 Answers

One possibility is that water has mixed with the oil forming a thick chocolate milk like mix that when pumped through the system increases the pressure

Posted on Dec 10, 2012

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get to try the service completely Free afterwhich it costs $6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
csmock132
  • 4669 Answers

SOURCE: Oil pressure goes to high right away as soon a car is started on

Try replacing the oil pressure sending unit

Posted on Feb 27, 2009

  • 35 Answers

SOURCE: 2004 Grand Cherokee: oil pressure fluctuates

if you know for certain that the sending unit is correct and the guage is accurate, then yiu may have big problems.....while the engine is running open the oil filler hole.. is everything wet with oil? or does it look dry or just a little lubed? you can allways install an aftermarket oil pressure guage(crappy tire) if you get the same results with that then you may have a week oil pump....worst case scenerio... need an engine rebuild as the moter may have wear issues.does the pressure slowly drop as the motor warms up? at idle ? does it jump up when you step on the gas?

Posted on Mar 30, 2009

nick781984
  • 10 Answers

SOURCE: 1995 jeep cherokee overheating...oil getting into coolant system.

try changing head gasket and this may sort your prob. could poss be a cracked head though

Posted on Jul 29, 2009

  • 295 Answers

SOURCE: oil pressure gauge goes up when car started, but then down to 0

u Have a problem with the oil sending unit. The sensor is located beack right side of the engine block. Take out the switch and make sure u have good oil PSI. Should be 6 psi at idle and around 50 at 4000 RPM. If the presure is ok replace the switch they are very cheap about 20 bucks. Please rate.

Posted on Aug 12, 2009

duane_wong
  • 6826 Answers

SOURCE: Cracked Cylinder Head

I'd say moderately difficult: here are the instructions for replacing the head on a 2001 Jeep Cherokee Sport with 4.0 L engine:

REMOVAL & INSTALLATION 4.0L Engines

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Drain the cooling system.
  3. Remove or disconnect the following:
    • Negative battery cable
    • Crankcase Ventilation (CCV) hoses
    • Air cleaner assembly
    • Accelerator cable
    • Cruise control cable, if equipped
    • Transmission cable, if equipped
    • Control cable bracket
    • Valve cover
    NOTE: Keep valvetrain components in order for reassembly.
    • Rocker arms
    • Pushrods
    • Accessory drive belt
    • A/C compressor and bracket, if equipped
    • Power steering pump and bracket, if equipped
    • Fuel line
    • Combination manifold
    • Thermostat housing coolant hoses
    • Spark plugs
    • Engine Coolant Temperature (ECT) sensor connector
    • Cylinder head
    To install: WARNING
    Cylinder head bolts may only be reused one time. If reusing a cylinder head bolt, place a paint mark on the bolt after installation. If a cylinder head bolt has a paint mark, discard it and use a new bolt. NOTE: Refer to Section 1 of this manual for the cylinder head torque sequence illustration. The illustration is located after the Torque Specification Chart.
  4. Install the cylinder head with a new gasket. Coat the threads of bolt No. 11 with Loctite® F 592 sealant. CAUTION
    During the final tightening sequence, bolt No. 11 will be tightened to a lower torque value than the rest of the bolts. Do not overtighten bolt No. 11.
  5. Tighten the cylinder head bolts, in sequence, as follows:
    1. Step 1: 22 ft. lbs. (30 Nm)
    2. Step 2: 45 ft. lbs. (61 Nm)
    3. Step 3: 45 ft. lbs. (61 Nm)
    4. Step 4: Bolts 1–10 to 110 ft. lbs. (149 Nm)
    5. Step 5: Bolt 11 to 100 ft. lbs. (136 Nm)
    6. Step 6: Bolts 12–14 to 110 ft. lbs. (149 Nm)
    7. Step 7: Repeat steps 4, 5 and 6
  6. Install or connect the following:
    • ECT sensor connector
    • Spark plugs
    • Thermostat housing coolant hoses
    • Combination manifold
    • Fuel line
    • Power steering pump and bracket, if equipped
    • A/C compressor and bracket, if equipped
    • Accessory drive belt
    • Pushrods and rocker arms in their original positions
    • Valve cover
    • Control cable bracket
    • Transmission cable, if equipped
    • Cruise control cable, if equipped
    • Accelerator cable
    • Air cleaner assembly
    • CCV hoses
    • Negative battery cable
  7. Fill the cooling system.
  8. Start the engine and check for leaks.

Posted on Jul 19, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How do I check for a blown head gasket on my 1990


Pretty much same answer as I gave for 87 Reliant see below. Shops have equipment to do cylinder leakage test. Do basic stuff below before doing last test ...cylinder leakage...which costs $$$.

Main point you are losing antifreeze/water. Check to see if you have water on the dipstick mixed in with oil. If so...probably a head gasket. If oil looks normal..... Before you do any test, tighten every hose connection. Check for loose connection into antifreeze reservoir. Sometimes there are small cracks on top which lets out pressure from cooling system. Look for leaks on water pump and radiator. Look at spot where you park the car...any liquid on floor? Not sure?..Put piece of cardboard under car to see if liquid is dripping from car. No leaks?...Start with a pressure test of the system. The pressure test is simply equipment that replace the radiator cap, a hand pump connected to it then air is pumped into cooling system. You watch the gauge to see if pressure is dropping. If pressure does not drop ..problem is most like a worn radiator pressure cap or stuck thermostat.. Do not buy the kind with button on cap to push down and release pressure. get original type and correct pressure. If overheating still, thermostat could be stuck, replace. Overheating of engine causes vapor lock, bubbles in fuel, which causes car to stall and kill. When cools off, fuel cools down and fuel will flow through fuel system again. Large amount of oil disappearing with overheating also sounds like head gasket or cracked head....Tighten up all bolts to gaskets, look for oil leaks on garage floor or driveway. If engine has developed a miss when running, pull plugs out and look for wet fouled plug. If antifreeze leaking into cylinder...plug tip will be whitish, if oil leaking into cylinder, grimey oil fouled. Do compression test on cylinder that is fouled and that will pinpoint if bad head gasket or cracked head. When doing compression test, radiator cap is removed and you listen to hear bubbles in radiator from the cylinder leaking into cooling system. 87 Reliant not worth pulling engine apart if head gasket or cracked head. Best oil treatment to reduce oil consumption is "Engine Restore" Used on my 58 Impala 348 tri power for 28 years. If I did not add it after oil changes it used oil and smoked....I swear by it for ANY engine after 100,000 miles.

Oct 19, 2014 | Cars & Trucks

3 Answers

2003 BMW 325I overheating


Water pump or head gasket?

Jul 14, 2014 | 2003 BMW 325i

1 Answer

We have a 2002 Jeep chereokee ltd v6 , it over heated we followed manual for what to do, stopped immediately and sat in neutral until the temp came down, temp didn't come, chime came on so as per manual...


The over heating may have been caused by the cooling fans not working or if you have a viscous fan hub it has failed and not drawing air through the radiator. The issue has happened by running the engine in an overheated condition and not immediately shutting down the engine. If a compression test was done to check for a head gasket or cracked head the failure would have been picked up earlier and the water in oil would not have happened.. I understand you following the manual but it takes time to cool an overheating engine so the correct answer is to stop the engine immediately the gauge goes into the red. The temp will still rise because of the latent heat in the engine and block but the damage is substantially reduced . The fault may have been a partially blocked radiator, compounded by the cooling fans not coming on early to cool the radiator. The only comment I would make is that the radiator guy should have done a coolant pressure test on the engine before replacing the radiator or run the engine to see if there was a rise in the radiator pressure indicating a head gasket failure.10k of driving is not a really good test

Sep 01, 2013 | 2002 Jeep Wrangler

1 Answer

2001 jeep grand cherokee over heating.building up alot of pressure.found crack in radiat5or and replaced it.changed thermostat and cooling sensor,still over heatd with alot of pressure.thought maybe i...


try to replace the radiator cap w/ new ones,then do not fully fill the water reservoir w/ water leave some space for the air to circulate when water boils.done this and still there's a overheating your need to replace your cylinder head gasket,frequent overheating damages the gasket.

Aug 14, 2012 | Jeep Grand Cherokee Cars & Trucks

1 Answer

1990 z71 keeps overheating, pull over and overflow will be empty when i just filled it, i remove the coolant cap and release the pressure, runs fine then gets overheated again!


1- simple test- with a COLD engine- remove radiator cap- start engine - idle till at temp- look in radiator- is it bubbling? if so - head gasket or cracked heat- if not-2
2- change upper and lower hose and your thermostat- hoses can crush restricting water and thermostats fail in closed position can do it to

May 27, 2011 | 1990 Chevrolet K1500

2 Answers

My 92 Ford Ranger 2WD 4 cylinder recently overheated. I pulled over and added water. Continued on, then it overheated again. After having it towed home, it will not start. It is turning over, just not...


When you added the water was the engine still hot? When you filled it, was the engine off, or running? Pouring cold water into an overheated engine, especially when the engine is not running, will crack the engine block-fatal. check for oil in coolant or coolant in the oil, check compression-if all are good, start checking for spark (ignition module) or fuel (sound of fuel pump when key is turned on)-good luck.

Mar 22, 2011 | 1991 Ford F250

1 Answer

What could be the reason for over heating? give me some parts i should look at


Possible reasons of over heating include, low water, thermostat, no thermostat installed, radiator stopped up inside with gunk or outside with bugs, broken or missing radiator shroud, missing lower air dam, fan not running if electric or fan not running because of oil filled fan clutch, intake gasket or gaskets stopped up, blown head gasket, cracked head, cracked block. I put these in order of simple to hard and mostly low price to high price. Hope this helps.

Oct 11, 2009 | 1993 Jeep Grand Cherokee

2 Answers

My 2000 Buick Century keeps overheating. We've changed the thermostat and radiator. Any other suggestions


If thermostat is new and you correctly filled radiator by filling while running and let level drop so all fluid goes into block and then fill up radiator again, then you either have faulty temp sensor or plugged exhaust.

Sep 10, 2009 | 2000 Buick Century

4 Answers

1995 jeep cherokee overheating...oil getting into coolant system.


try changing head gasket and this may sort your prob. could poss be a cracked head though

Jul 29, 2009 | 1990 Jeep Cherokee Limited

Not finding what you are looking for?
2002 Jeep Wrangler Logo

184 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

76630 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...