Question about 1995 Jeep Grand Cherokee

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BLOW-BY? Bieng told, I have a blow-by issue! Oil leaking from the dip-stick! 95 Jeep GC Laredo!

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  • sir_nubian May 08, 2009

    My apologies...........I have the 4.0 I6

  • sir_nubian May 08, 2009

    I shall do that! Appreciate the "direction"! Will return with the outcome!

  • jeepDick May 26, 2009

    oil leak thru dip stick port. could it be that the piston rings are shot I just bought this engine 'cause I blew the last one and the oil was shooting out the dipstick and filler ports

  • Dave  C
    Dave C May 11, 2010

    Which engine is it?

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Okay blow by is in the combustion chamber ... now if you wanna see whats happening disconnect the coil or pull the fuel fuse so it wont run but tries to start ... when you turn the key .. now put a pressure spark plug gauge to test the compression one by one to each cylindar record the results if you low pressure you can add a little oil in the spark plug hole and a 1/3 pint and put the gauge back on and try to start look for differences ..now think if a test was low and you add oil in the cylindar and test it again and its higher compression the piston rings are wearing . if you get the same low reading with or with out oil the valves are not sealing ..have a Blast !!! Im me if you need ....

Posted on May 08, 2009

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This is a very common problem on these engines. Most don't have a PCV valve, they have a PCV tube with a metered orifice in the valve cover. You need to take the PCV tube off and clean it out thoroughly with aerosol carb cleaner and get piece of wire or a drill bit and clean out the orifice. If the engine has a lot of miles on it, I will drill a much bigger orifice and install a bigger tube with a PCV valve from any other car that happens to fit what I've fabricated. This has the advantage of providing a lot more flow when the engine is working hard. A good shop should be able to do this for you, if you print this post, they should know what I mean. Many shops have been doing this for years on these because they are so bad.

Posted on May 08, 2009

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Hello;
Try changing the PCV Valve. When the valve clogs up, pressure is exerted on the crankcase and blows out the easiest place like the dipstick tube.
Thanks;Rich
RPM Northwest

Posted on May 08, 2009

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the book covering this (FSM) is free to read.
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http://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#service


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26147818-kvl5e4kdfcykuopgofwmpgkg-5-0.jpg
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26147818-kvl5e4kdfcykuopgofwmpgkg-5-1.jpg

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