12-07-2021, 09:49 PM | #1 |
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Join Date: Dec 2018
Location: greencastle indiana
Posts: 105
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oil leak
has anyone ever had an oil leak from the threaded hole for the z-bar pivot ball shaft? it appears to be worst when the engine is shut off and not under pressure while it's draining. thanks for your help on this!
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12-08-2021, 01:56 AM | #2 |
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Join Date: Mar 2003
Location: Colfax-California
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Re: oil leak
All of the Z bar holes I've seen are a blind hole and have no connection to the oiling system unless you have the pivot ball in the oil galley port and have somewhat cross threaded the pivot into the pipe plug hole
Last edited by kwmech; 12-08-2021 at 11:11 AM. |
12-08-2021, 08:04 AM | #3 |
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Join Date: Dec 2018
Location: greencastle indiana
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Re: oil leak
that's what I thought too! but it has oil leaking out of it because it doesn't thread all the way in leaving a couple threads exposed. I also pulled the pivot ball off an old 283 that has been setting on the passenger side for years and it had dark motor oil
on the threads and inside hole also. |
12-08-2021, 08:08 AM | #4 |
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Re: oil leak
it's in the same hole the 283 had it in, if it was in the wrong hole nothing would line up and or function properly.
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12-08-2021, 08:43 AM | #5 |
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Location: Vacaville , CA
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Re: oil leak
I would like to see pics if you'll post a couple.
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man R.I.P. FleetsidePaul |
12-08-2021, 10:15 AM | #6 |
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Location: greencastle indiana
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Re: oil leak
Ol blue, pm me your phone number and i'll send you some pic's this evening after I get home from work. I've tried to post pictures before and can't seem to get them to post on here. thanks
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12-08-2021, 11:11 AM | #7 |
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Join Date: Mar 2003
Location: Colfax-California
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Re: oil leak
It is supposed to thread all the way in and tighten down like a bolt. You're in the wrong hole.
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12-08-2021, 02:31 PM | #8 |
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Location: greencastle indiana
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Re: oil leak
there is only on hole to put in beside the oil dip stick hole. z-bar lines up and pivots correctly. it doesn't thread all the way in and tighten up to seal it off is the problem. i'll pull it out and shorten it up so that it does. I've just never seen one that leaked before, especially draining back down with the engine off and not under pressure from the oil pump. engine is a brand new rebuild with about 30 miles on it and that's definitely where it's leaking from.
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12-08-2021, 04:10 PM | #9 |
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Join Date: Mar 2015
Location: washington
Posts: 2,295
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Re: oil leak
Possibly you have a early Nova block. There are some rare exceptions to the SBC platform.
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12-08-2021, 05:36 PM | #10 | |
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Re: oil leak
Quote:
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12-08-2021, 06:39 PM | #11 |
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Join Date: Jan 2005
Location: CA
Posts: 5,982
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Re: oil leak
A 350 engine I'm rebuilding right now had only the rear hole (#1) drilled for the Z bar ball mount, so I drilled and tapped the front one (#2). The rear hole passes all the way through the block and exits back by the flywheel. The front hole is blind. If it were drilled too deep, it would break through into the water jacket. That third hole has a pipe thread for a plug.
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12-08-2021, 06:52 PM | #12 |
Senior Member
Join Date: Jan 2005
Location: CA
Posts: 5,982
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Re: oil leak
A 350 engine I'm rebuilding right now had only the rear hole (#1) drilled for the Z bar ball mount, so I drilled and tapped the front one (#2). The rear hole passes all the way through the block and exits back by the flywheel. The front hole is blind. If it were drilled too deep, it would break through into the water jacket.
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