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Old 08-20-2014, 08:57 PM   #1
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never ending..

Ok so I am still having oil come out through the dipstick. I have replaced the pcv and breather as well as the checked and tightened all the bolts around my oil pan and the valve cover. Also I have a new oil cap.
Story behind the engine, the jeep is a 1990 and the engine is a 4.2l remaned from 1986. With about 3500 miles on it. I just put some etc sealant around the base of the dipstick and now waiting for it to dry. Any other suggestions to help vent that crankcase some??

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Old 08-20-2014, 09:51 PM   #2
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Did you check the other line or the fitting for that line that goes into your valve cover?

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Old 08-20-2014, 10:01 PM   #3
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Did you check the other line or the fitting for that line that goes into your valve cover?
Oops yea sorry I replaced all the rubber lines going back to the intake manifold just for safe measure. The rubber gaskets for the pcv valve is also new along with the or for the breather air filter.
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Old 08-20-2014, 10:18 PM   #4
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Hmm, I just read another thread with the same issue and that's why I asked. That thread post had a clogged brass fitting, they cleaned it out and no issue.
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Old 08-20-2014, 10:19 PM   #5
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Do a compression test to see if your piston rings are not sealing correctly in the bores.

Measure intake vacuum at idle.

Both will provide some needed information about the condition of the engine.
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Old 08-20-2014, 10:21 PM   #6
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Do a compression test to see if your piston rings are not sealing correctly in the bores.

Measure intake vacuum at idle.

Both will provide some needed information about the condition of the engine.
Ok thanks I'll get that taken care of tomorrow.also it only seems to leak when I go for a drive.
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Old 08-21-2014, 01:57 AM   #7
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Check the vacuum source that draws the PCV. Make sure it actually has a vacuum. My MJ had a crusted blocked port on the throttle body. Had to clear it out with a drill bit. No more leaks after that. X 2 on doing a compression test.
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Old 08-22-2014, 04:13 PM   #8
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Check the vacuum source that draws the PCV. Make sure it actually has a vacuum. My MJ had a crusted blocked port on the throttle body. Had to clear it out with a drill bit. No more leaks after that. X 2 on doing a compression test.
Vacuum pressure is there found my radiator was low,so replaced the radiator and then. Realised I have a blown head gasket...so that's the job for tonight.
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Old 08-23-2014, 06:09 PM   #9
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Vacuum pressure is there found my radiator was low,so replaced the radiator and then. Realised I have a blown head gasket...so that's the job for tonight.
All d o be from midnight to 4 am. Now have to let some of that moisture burn out if the exhaust, new plugs then tune the carb and for sanity reasons a compression test.

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Old 08-23-2014, 06:55 PM   #10
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Hmm, I just read another thread with the same issue and that's why I asked. That thread post had a clogged brass fitting, they cleaned it out and no issue.
I agree because that was exactly what was wrong with mine, the idiot PO clamped the hose on there wrong after the pcv valves busted and was making my oil come out the dipstick. That was my first guess is that the hose is plugged
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Old 08-23-2014, 10:45 PM   #11
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In the pics it look like you don't have a dust cover between then engine and the Trans.
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Old 08-23-2014, 11:07 PM   #12
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In the pics it look like you don't have a dust cover between then engine and the Trans.
You are correct for the time being. I had issues finding the right starter and flywheel at first as the remanned engine didn't say the year so I thought the starter gears were it engaging all the way so u was removing space. Good thing is its only about 10 mins to listen it up and slap it back on
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Old 08-24-2014, 07:43 PM   #13
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Have you go it back together? hows it run now?
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Old 08-24-2014, 08:03 PM   #14
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Have you go it back together? hows it run now?
Yup it's back together but I'm not happy...
It runs ok starts up fine but did a compression test and double checked it multiple times and here are the results...
Piston 1 110
Piston 2 148
Piston 3 90
Piston 4 is 5...
Piston 5 148
Piston 6 is 5
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Old 08-24-2014, 11:11 PM   #15
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Yup it's back together but I'm not happy...
It runs ok starts up fine but did a compression test and double checked it multiple times and here are the results...
Piston 1 110
Piston 2 148
Piston 3 90
Piston 4 is 5...
Piston 5 148
Piston 6 is 5
So time to pull the engine and rebuild. The head and possible do the rings while i am at it.. so much for a remanned engine...
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Old 08-25-2014, 05:06 PM   #16
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I've seen some come in the shop so bad with Boring tool ridges in the cylinders from over boring or just not honing, that we sent them back, those where the Cheap remans. that some folks wanted us to install for them, and we told them to send it back we Will Not Put That In, Your PO may have put some thing like that in to sell it and now the rings are gone. But that low sound like a hole in a piston, or bad Valves. Try putting some oil in the cylinders and recheck Compression to see if its valves or rings.
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Old 08-25-2014, 05:18 PM   #17
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I've seen some come in the shop so bad with Boring tool ridges in the cylinders from over boring or just not honing, that we sent them back, those where the Cheap remans. that some folks wanted us to install for them, and we told them to send it back we Will Not Put That In, Your PO may have put some thing like that in to sell it and now the rings are gone. But that low sound like a hole in a piston, or bad Valves. Try putting some oil in the cylinders and recheck Compression to see if its valves or rings.
I put oil in both cylinders 4 and 6.with oil cylinder 4 went up to 30 psi.6 still stayed at 5.it will have to be about a month until I can pull it and start tearing it down as I will be heading up to va for work

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