Question about 1983 Jeep CJ5

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Oilleak(notrearmainseal)jeep304 bad oil leak on 1980 jeep cj5 304. repaced rear main seal. did not solve problem.valve cover and intake gsk. are good. cannot find where it is leaking.

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  • Eldric Venne
    Eldric Venne May 11, 2010

    Most likely leaking out of the back of the intake. Is it oily on the transmission bell housing?

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  • 34 Answers

Loose or cracked oil galley plug

Posted on Jul 17, 2009

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Oil leak on driveway coming from front of engine


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

    Nov 02, 2012 | Toyota Cars & Trucks

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    Replace rear main seal in engine


    To do this job, you pull the trans, and frywheel. Rear main seal is fairly UNcommon. Most oil leaks wind up manifesting in the rear main seal area. Check other areas first, like valve cover and intake gaskets.

    Jan 16, 2011 | 1995 Jeep Grand Cherokee

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    I have an oil leak in my 1993 jeep grand cherokee laredo,and I would like to find out the price to repai it.


    Need to know what type of leak? Motor oil or Transmission oil ?
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    Mar 26, 2010 | 1993 Jeep Grand Cherokee

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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

    Mar 05, 2010 | 2001 Nissan Frontier Crew Cab

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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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    Oil leak in my 92 jeep cherokee


    The most likely place for an engine to start leaking oil (when it's coming from the top and not the bottom) is around the valve covers -- the gasket goes bad. Next most likely is camshaft seals.

    Sometimes just tightening the valve cover botls will stop it or at least reduce it.

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    Oil leaks


    clean off the area where you suspect the leak is then run and check. The only way to change rear main seal (and have it actually work) is by removing crankshaft. I have seen this attempted at least a hundred times and never seen one yet that didn't leak. Some of the new oils for "older engines" have a seal softener in them tha usually will help but don't expect results for months...it took years for seals to harden & wear.

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    rear main seals dont just stop leaking it sounds like its your valve cover gaskets leaking and running down

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    Oil leak


    if its leaking from the top then its the valve cover gaskets. if its underneath the either the oil pan gasket or the rear main seal.

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