Question about Mitsubishi Montero

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1996 Mitsubishi Montero LS 4x4. 3.0 Liter V6 with 210,000 miles on it. It leaks and burns oil, other than that, it is in good mechanical shape. What could be causing the leak.

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  • mick lumtin May 11, 2010

    hi there

    depending on how it burns oil if it blows smoke on start up or after it idles for a while it will be valve stem seals or valve guides wich is in the top end of the engine.

    if it blows smoke when driving or at about 3000rpm in neutral it will be rings or in the bottom end.

    the leaks could be from front or rear seals in the engine maybe rocker cover gaskets but if it does have an issue with the rings it may have blow by past the rings in that case the oil is actually pushed out rather than leaking out.

    i would check out how it is blowing smoke first and go from there.i hope this helps

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6 Suggested Answers

mjvgamer
  • 7 Answers

SOURCE: how to change the fuel pump on a 1994 Mitsubishi Montero LS 3L V6

just for you REMOVAL & INSTALLATION
See Figures 1 and 2
WARNING In almost every case, replacing the Mitsubishi electric fuel pump requires removal of the fuel tank. Please refer to the fuel tank removal and installation procedure at the end of this section.

  1. Lift or move aside the carpet in the rear cargo area.
  2. Remove the oval cover plate from the access hole.
  3. Disconnect the fuel pump harness connector at the rear of the fuel tank.
  4. Start the engine, allowing it to run until it runs out of fuel. This relieves pressure within the fuel system.
  5. Turn the ignition switch OFF and disconnect the negative battery cable.
  6. Remove the fuel filler cap.
  7. Drain the fuel from the fuel tank into suitable container(s), each with an airtight lid.
  8. Carefully, and using two wrenches on the fittings, disconnect the high pressure fuel line and the main fuel line from the pump. Remove the high pressure fuel hose at the body-side main pipe connection, unfasten the pump-side connection. Wrap each joint in a rag before loosening; some pressure may remain within the system.
  9. Remove the fuel pump retaining nuts and carefully remove the pump from the tank.
The fuel pump may still contain liquid fuel. Drain it into a suitable container with an airtight lid before performing any tests or inspections.
To install:
  1. Carefully install the pump into the tank and install the 6 retaining nuts onto the studs. Tighten the nuts evenly and in a crisscross pattern to 12 ft. lbs. (16 Nm).
  2. Reinstall the high pressure and supply line to the pump.
WARNING Take great care when connecting the threaded high pressure lines. Start the threads by hand, then, while holding the hose side to keep it from turning, tighten the flare nut to 27 ft. lbs. (37 Nm).
  1. Connect the pump wiring harness.
  2. Connect the negative battery cable. Turn the ignition key to ON but do not start the engine. You should hear the pump running. Allow it to run for about 10 seconds to build line pressure, then start the engine.
  3. After the engine has run smoothly for a minute or two, shut the ignition off and check the work area for any trace of leakage. Attend to any fuel leaks immediately, remembering that the system has repressurized and must be handled safely.
  4. Reinstall the cover on the access hole and replace the carpet in the cargo area.
0900c152800547c3.jpgFig. 1: Components of the fuel pump and fuel tank 0900c152800547c4.jpgFig. 2: Components of the fuel pump-all models similarTESTING
When diagnosing engine problems, particularly a "no start" condition, the fuel pump function should be checked. Because of the difficulty in reaching the fuel pump connections, Mitsubishi automobiles have a conveniently located test connector under the hood. V6 Monteros have the connector taped to a wiring harness inside the right front kick panel, near the ECM and relays.
This connector bypasses all of the controls in the system (ignition switch, pump relay, etc.) and sends voltage directly to the pump. When power is applied to the pump you should be able to hear it running, although the in-tank pumps require you remove the fuel filler cap and listen at the filler.
To use the test connector, make certain the ignition is OFF. Great damage may be caused if the system is tested with the key on. Locate the test connector in the engine compartment (on later Monteros it is located under the right-hand side of the dashboard)-it is generally on a short lead out of a wiring harness and looks like a plug that isn't connected to anything. Once found, use a jumper wire to connect the test terminal to the positive battery terminal. Listen for the fuel pump; if it runs, you know the pump motor is good. While the pump is running, gently squeeze one of the fuel lines and confirm that the pump is delivering fuel pressure. If it does not run, the pump itself is most likely defective OR the connector to the pump is faulty.
When the pump is removed from the tank, it may be checked by applying battery voltage (+) to the connector and grounding the housing. Only run the pump for one or two seconds during this test; the pump can be damaged by running without liquid.
CAUTION Make certain the pump has been drained of residual fuel and is free of fuel vapors. Connecting and removing the test leads will cause sparks which can ignite any vapor in the area.

Posted on Jan 18, 2009

GM Elec
  • 1000 Answers

SOURCE: oil burning when start up.

There are a couple of things that can cause this.
1) Engine oil over filled.
2) PCV valve defective.
3) Engine valve seals damaged or broken.

Is this a high millage car?
Let me know.
Regards,

Posted on Mar 23, 2009

slfowler29
  • 51 Answers

SOURCE: oil pressure sending unit is leaking oil, what is

They make a special socket to fit those which you can get at an auto parts store along with a new unit.

Posted on Mar 25, 2009

66 chrgr
  • 1011 Answers

SOURCE: JEEP oil leak

your oils sending unit is leaking the part is not expensive,

Posted on Jun 29, 2009

GeoffW1
  • 3961 Answers

SOURCE: My toyota vienta 3VZ-FE 1996 - oil leak onto exhaust

Hi,

That engine will leak oil from

- cam cover gaskets (rear one drips on the exhaust)
- camshaft end seals
- distributor shaft o-ring (appears on top of transaxle housing)
- oil filter bracket to block o-ring seal (drips on front bank exhaust)
- crankshaft nose oil seal (have done with timing belt change)
- rear main seal (expensive, leave it be)

Posted on Jan 08, 2010

Testimonial: "thanks I will try them all, the oil filter bracket first."

drsinister69
  • 2317 Answers

SOURCE: mechanical or hydraulic lifters for my '99 montero sport??

Hydraulic

Posted on Mar 16, 2010

Testimonial: "thank you. i appreciate it"

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1 Answer

I have a 1999 mitsubishi montero sport ls with an automatic transmission. the transmission is stuck in low gear and you must drive it approx. 5-6 miles before the transmission starts shifting properly


have the autobox fluid level checked , as the age of vehicle is 15 years i would have the fluid changed unless you know for sure its been changed in the last 20k miles

May 16, 2014 | Mitsubishi Montero Sport Cars & Trucks

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Oil leak in 2001 mitsubishi montero sport


could be from a number of places have the engine thoroughly cleaned and then look for fresh oil drips starting at highest point of engine working way down

Apr 02, 2014 | 2001 Mitsubishi Montero Sport 4WD

1 Answer

My montero sport is burning oil what the cause.?


Could be worn piston rings letting oil into the top of cylinder from below, or worn valve stem seals or valve guides letting oil in from above.. A shop could do a compression test or a leak-down test and give you a good idea of the engine's health. Low compression on any of the cylinders means the rings or valves are not sealing well, and could let oil in to burn. Either of the tests could point to the problem, but a leak-down test is considered the more accurate test
How much is burning? If you are burning more than a quart every thousand miles, it is a problem that needs attention. Most car makers say a quart every 3 thousand miles is not a problem and may be considered normal, although owners may dispute that as they often do. Some engines just seem to lose no oil between oil changes, but most do use or lose a little oil between changes, it is normal. If your oil consumption is on the high end, have the test done. If your rings are good, a cylinder head job (for the valve work) is much less expensive than an engine rebuild.

May 29, 2012 | 1998 Mitsubishi Montero Sport

1 Answer

Oil pump not raing pressure


If this is a 3.0 liter V6 the oil pump is driven directly by the crankshaft. This pump is located directly behind the timing belt sprocket on the crank. To access it you'll have to remove bolts from the front portion of the oil pan and remove, for the most part, everything off the lower front portion of the motor. If you feel comfortable a good shade-tree mechanic you should be able to do this, expect a full weekend though. While doing this go ahead and replace timing belt and belt tensioner too. In truth I can't imagine this pump failing. They are very simple yet very rugged. Are you able to put another gauge on a oil line to test true oil pressure? Curious to what problems you are having?

Thanks,
Tom

Apr 23, 2010 | 1999 Mitsubishi Montero Sport

3 Answers

Lifter sound in the morning


check your oil for low level or you probably
need valve adjustment

Apr 04, 2009 | 1998 Mitsubishi Montero Sport

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