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Unread 04-30-2013, 08:44 PM   #46
lucdog
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Surprised no one has said anything about the lack of oil in the rockers on cylinder 6. Im far from a expert on this, but I think I would crank the engine over, paying close attention to the rockers on #6 cylinder and the push rods. Check for lift with your dial indicator, and possible bent pushrods.

My though is if the exhaust valve isn't opening,( or isn't opening far enough and the intake is, there isn't any place for the air to go except into the crankcase when the piston comes up on the exhaust stroke.

Like Jon, this also may be a WAG, I'm not sure.

Bill

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Unread 05-01-2013, 10:20 AM   #47
Big-Jon
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1977 CJ5 
 
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@lucdog -- I don't have a cat on my jeep. I have them stupid 2pc headmen headers and 2 cherry bombs. This set up will get replaced as soon as I get ahold of a stock exhaust manifold. My # 3 cylinder had a lifter that wasn't getting oil. So when I took my head off I checked the push rod tub. It wasn't bent, but it was very dirty and gummed up. I also found some holes on the bottom of my head that where either blocked totally or gummed up pretty bad. I wish I would have taken pictures before I started cleaning it up. I will try and get some pics of everything tonight.
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Unread 05-01-2013, 03:56 PM   #48
Skerr
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Quote:
Originally Posted by Jon In Tucson View Post
Total WAG:
I worked on a '85 CJ-7 not too long ago that would idle fine as could be but under any acceleration blow oil out the dipstick. Also had a noticeable loss of power in acceleration. It turned out to be a plugged catalytic converter. Any chance of some sort of exhaust blockage? God bless.
Jon In Tucson
Exhaust blockage!? Hmmm... I didn't check that. The entire system is "new", less than a year old. It hasn't even started rusting yet. There is no CC, only the muffler, which is a big, round one. I'm gonna say no problems there. There is no loss of acceleration. Engine runs very good. Thanks, Jon.
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Unread 05-01-2013, 04:47 PM   #49
Big-Jon
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Here are some pics of my engine and push rods. The guy that I took my head to said he would clean it and redo my valve seats and guides for 80 bucks.
dsc_0125.jpg   dsc_0126.jpg   dsc_0127.jpg   dsc_0128.jpg   dsc_0129.jpg  

dsc_0130.jpg   dsc_0131.jpg   dsc_0134.jpg   dsc_0135.jpg   dsc_0136.jpg  

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Unread 05-01-2013, 07:40 PM   #50
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Big-Jon... I think $80 is a great price for the work you described. I hope the work you are doing is all that is needed to get your engine straight. Keep us posted.
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