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Unread 09-21-2014, 05:04 PM   #1
Jeepfan1000
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Dipstick ring?? HELP!

Hey guys. I searched this thread and google to answer my questions but couldn't find a yes or no answer. I have a 78 cj7 with a 232, wich I guess is the same as a 258 for most things. Is there a rubber o ring or boot on the oil dipstick?? I've searched other threads and I can't find a yea or no but others posting other issues it could be. So before I go chasing buying a compression tester ( I just changed the pcv valve) I need to find and issue. At higher rpms the oil comes out of the dipstick tube. And the valve cover cap. I tried putting a diff valve cover cap on and it made the dipstick worse. Witch is how I found out about it I think the cap I have now is vented wich is why it comes out at the higher pressure. Any help would be appreciated. Thanks

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Unread 09-21-2014, 05:10 PM   #2
Jeepfan1000
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When I take the pcv valve out and run it smoke comes out of the whole. Kinda blueish?
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Unread 09-22-2014, 12:49 AM   #3
Matt1981CJ7
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What you have described is called blow-by. The PCV system is designed to vent normal amounts of blow-by back thru the intake.

Is your PCV hooked up like the diagram below?

When an engine gets worn and tired, the rings allow more blow-by than the PCV system can deal with, and oil starts leaking out of places like the dipstick and valve cover.

Matt
vac-pcv.png

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Unread 09-22-2014, 07:44 AM   #4
Jeepfan1000
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So I should do that compression test? My rear pcv breather is blocked, has a bolt in it.
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Unread 09-22-2014, 08:58 AM   #5
Cutlass327
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Remove the bolt. The PCV system is designed to use vacuum to pull the vapors out, but at higher RPM there is less vacuum, so it will also go back they the breather tube to the air cleaner for a backup system. Plus you need the fresh air in when the PCV is working.
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1978 CJ5 258/T177/D300, '86 D30/D44 WT axles, 'glass tub windshield frame, and fenders, 31x10.5 BFG A/T, TDK galv'd frame - DD and weekend toy

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Unread 09-22-2014, 11:49 AM   #6
Ken4444
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Quote:
Originally Posted by Jeepfan1000 View Post
So I should do that compression test? My rear pcv breather is blocked, has a bolt in it.
I'd like to see a photo of that!
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Unread 09-22-2014, 11:49 AM   #7
Jeepfan1000
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Okay I'm removing the bolt. But I have an aftermarket air filter that doesn't have a hookup for it. I ran around today looking for a cap with a filter but I can't find anything , anyone have suggestions where to look?
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Unread 09-22-2014, 11:51 AM   #8
Jeepfan1000
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Okay. I'll try and get a pic. I've never posted a pic on here so I'll figure it out and get back to you
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Unread 09-22-2014, 12:29 PM   #9
Ken4444
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Quote:
Originally Posted by Jeepfan1000 View Post
...I ran around today looking for a cap with a filter but I can't find anything , anyone have suggestions where to look?
Mr. Gasket makes several types for a reasonable price. You can usually find them in the "speed" section of the auto parts store. This page shows several of the ones they make:

http://shop.mr-gasket.com/engine-com...-breather.html

These are sold online by all of the usual vendors. I like Summit Racing, personally.
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Unread 09-22-2014, 06:00 PM   #10
Jeepfan1000
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The first pick is the bolt the PO put in there.
the next issue leaking oil cap
and the next is the cap I finally found on it. Thanks guys for the help! Though I finally found the part and the oil only leaks from the cap now, but smoke pours our of the filter breather I just got and you can smell it when you drive. I think this is why it was plugged when I bought it I'd almost rather have I plugged till I figure out the compression on the cylinders. Does this hurt it more?? ( let me know if pics are messed up, first time posting pics)
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Unread 09-22-2014, 06:01 PM   #11
Jeepfan1000
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Unread 09-22-2014, 06:02 PM   #12
Jeepfan1000
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http://s1378.photobucket.com/user/To...g.html?filters[user]=141465311&filters[recent]=1&sort=1&o=3
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Unread 09-22-2014, 06:05 PM   #13
Jeepfan1000
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Can't figure out this picture thing
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Unread 09-22-2014, 08:18 PM   #14
Unretarded
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It might blow oil out the dip stick again if you plug it.......the older cars had a road draft tube to get the smell out of the engine bay since they had no pcv valve..........

It sounds like massive blowby to me.........

Thats one of the things to look for when buying a older car........take the filler cap off and check for blowby........
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Unread 09-23-2014, 10:54 AM   #15
Jeepfan1000
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Yea I'm thinking the PO new and just wanted to unload the thing
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