Question about 2001 Jeep Grand Cherokee

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Oil leak where trans. meets engine. Is this the oil pan gasket? or the rear main seal?

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Could be either. It's rather cheap to change the oil pan gasket if you do it yourself. That would be my first route. If its the rear seal you have to pull the trans or engine to replace.

Posted on Nov 06, 2010

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Dear Sir,
Here is the oil leaking Problem Identifying Technique

Engine oil leaks from the valve cover gasket are common.

  • The intake manifold plenum gasket may leak and cause increased oil consumption/burning and a spark knock during acceleration; the gasket should be replaced.
  • External oil leaks from valve cover gaskets, intake gaskets (front or rear), and the rear crankshaft (rear main) seal area are common. The rear main seal is an unlikely source. Normally, the bearing cap mating surfaces (as well as the sealing surface between the oil pan and bearing cap) are the source for the leaks.
  • Engine oil leaks at the distributor can be misdiagnosed as leaks from theintake manifold seal, oil pan gasket, or rear crankshaft (rear main) seal. A revised distributor is available if oil is found inside the distributor.
  • If the oil filter casing shows signs of distortion from excessive oil pressure, theoil pump should be replaced.
  • Often misdiagnosed as a leaking oil filter gasket, the oil filter adapter can seep from between the adapter and engine block.
  • Carbon buildup on the top of the piston is common. As the buildup increases with mileage and over time, symptoms may vary from light ticking, to ticking/hammering, to hammering/knocking noises. Fuel injector cleaner often solves the problem.

  • I think it helps to analyse u r Problem

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    Rear engine oil leak....


    Oil leak can be attributed to several factors.
    1. Gasket failure.
    2. Uncontrolled Crank case pressure Failure.

    RECOMENDATION:
    Tighten both the valve cover and oil pan bolts.
    Replace the Positive Crankcase Ventilation Valve and vacuum line.,

    INFO: PCV
    This is a valve causes a negative vacuum on the engine while its running, As to say if it had a leak in a valve cover it should not be leaking while its running, only when the engine it turned off.

    Hope this tip guides you in the correct direction to solve this problem.

    R/
    David

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    I changed tranny filter and pan gasket, still leaks, possible inner seal? any suggestions?


    need to identify where leak is coming from wipe clean bottom of transmission and check trans lines ,dipstick tube, rear seal ,pan for leak or drip start van and let run drive around block than park and recheck trans for leak if leak by where engine and trans meet than front seal anywhere else fix and or replace front seal two choices first can try a trans leak additive follow instructions carefully or need to pull trans to replace seal

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    1984 F150 302 Had oil pan gasket and both valve cover gaskets


    you have several points to check!
    the dip stick tube has a "O" ring seal at the bottom where it fits to tranny.
    a reverse switch on tranny & the shifters selector shaft has a seal that may be leaking !
    there are the cooler pipes from cooler to tranny [in & out] plus pump seal to the torque converter [leaks out between engine & tranny bellhousing] & then there are the drive shaft or shafts seals
    so wipe it all clean & park it in a diffrent clean spot!
    some will only leak when its runnung due to tranny,s internal pressure!

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    Oil leak at the bottom of the oil pan. Still leaking after i tightend the pan bolt. What should i check next, can this cause other problems?


    Dear Sir,
    Here is the oil leaking Problem Identifying Technique

    Engine oil leaks from the valve cover gasket are common.
  • The intake manifold plenum gasket may leak and cause increased oil consumption/burning and a spark knock during acceleration; the gasket should be replaced.
  • External oil leaks from valve cover gaskets, intake gaskets (front or rear), and the rear crankshaft (rear main) seal area are common. The rear main seal is an unlikely source. Normally, the bearing cap mating surfaces (as well as the sealing surface between the oil pan and bearing cap) are the source for the leaks.
  • Engine oil leaks at the distributor can be misdiagnosed as leaks from the intake manifold seal, oil pan gasket, or rear crankshaft (rear main) seal. A revised distributor is available if oil is found inside the distributor.
  • If the oil filter casing shows signs of distortion from excessive oil pressure, the oil pump should be replaced.
  • Often misdiagnosed as a leaking oil filter gasket, the oil filter adapter can seep from between the adapter and engine block.
  • Carbon buildup on the top of the piston is common. As the buildup increases with mileage and over time, symptoms may vary from light ticking, to ticking/hammering, to hammering/knocking noises. Fuel injector cleaner often solves the problem.

  • I think it helps to analyse u r Problem

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    How to diagnose an oil pan leak


    If you have an automatic trans there should be a metal plate just after the rear seal of the motor. If you can remove the shield and see rust, good. If it has red oil, bad, its the trans. You will be able to see if the rear main of the engine is leaking by the oil on the torque converter and flywheel. You may just need to gently tighten the pan bolts which may loosen by themselves.

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