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Clive J
Joined: 03 Nov 2007
Posts: 340
Location: UK
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 Posted: Sun Feb 19, 2012 11:40 pm Post subject: Oil circuit? |
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I’ll have a go:
Sump
Pump
Sender (original position)
Filter port out of crankcase, this is the OCA inlet, Relief valve (bouncing control valve for most engines, flows back to sump) This is from area under OCA or filter if OCA isn’t fitted.
If OCA or TOCA fitted through cooler. With early OCA (drilled bypass) and TOCA some (or all in case of TOCA) bypasses cooler.
From cooler or toca bypass into filter (outside)
next out of filter (centre) to feed oil gallery
Sender (new position) is on end of gallery
The gallery runs the length of the engine and taps off through multiple channels to feed up to mains and prop bearing, from there big ends, small ends, pistons
Off the gallery is also tapped the feed to the rockers on those engines, this runs through a transverse pipe and drips onto the valve springs (outlet above each spring) and from there into bottom of rocker boxes where it runs down push rod tubes back into sump (this was an area of much discussion during the mid noughties).
And off the gallery is the multiple feed down to the hydraulic lifters which we are learning so much about. From rod (socket) end of lifter it either drips away to sump (better with slotted end to rod) or feeds the:
hollow rods up into rockers to rocker shaft (nothing to valve guides apart from mist).
All over the moving parts any lost oil will return to the sump.
There you go, there is a good drawing in the later manuals, side view of crankcase. I suppose a schematic could be drawn.
What did I miss?
Regards, Clive
From: jabiruengines(at)yahoogroups.com [mailto:jabiruengines(at)yahoogroups.com] On Behalf Of Warren Butler
Sent: 20 February 2012 05:11
To: jabiruengines(at)yahoogroups.com
Subject: RE: [jabiruengines] Re: Ticking noise at start-up. Any ideas?
This question may be off topic a bit but I will ask it anyway. Much has been discussed about the ‘best’ oil pressure sender position.
Question: Can someone please explain to me the path taken by the oil from the sump, returning back to the sump, with key passage points en-route, such as sender, oil filter, oil cooler, rocker chambers, etc, etc.? That will help me get a better understanding of where the high and low pressure areas are.
Warren Butler
New Zealand
From: jabiruengines(at)yahoogroups.com <mailto:jabiruengines%40yahoogroups.com> [mailto:jabiruengines(at)yahoogroups.com <mailto:jabiruengines%40yahoogroups.com> ] On Behalf Of sroydsmith
Sent: Monday, 20 February 2012 5:58 p.m.
To: jabiruengines(at)yahoogroups.com <mailto:jabiruengines%40yahoogroups.com>
Subject: [jabiruengines] Re: Ticking noise at start-up. Any ideas?
Bernardo,
I moved my oil pressure sender off the engine entirely so it will not wear out with engine vibration. I plugged up the hole where the sender is "normally" located. I feed my sender via a line from the hole just below the "normal" hole. The hole provides pressure information AFTER the filter and the oil cooler.
There have been quite a few posts about this on the forum.
Steve
--- In jabiruengines(at)yahoogroups.com <mailto:jabiruengines%40yahoogroups.com> <mailto:jabiruengines%40yahoogroups.com> , "Bernard Melendez, Jr." <n45bm(at)...> wrote:
| Quote: |
Hi Steve,
What is you "more intelligent" location for the oil pressure sender? Got any pics? Thanks.
Bernardo
--- On Sun, 2/19/12, sroydsmith <sroydsmith(at)...> wrote:
From: sroydsmith <sroydsmith(at)...>
Subject: [jabiruengines] Re: Ticking noise at start-up. Any ideas?
To: jabiruengines(at)yahoogroups.com <mailto:jabiruengines%40yahoogroups.com> <mailto:jabiruengines%40yahoogroups.com>
Date: Sunday, February 19, 2012, 10:16 AM
 Needless to say, on my new engine I have the oil pressure sender in a more intelligent place. And I will never ignore a ticking sound again.
You live and you learn â€" or you don't.
Steve
[Non-text portions of this message have been removed]
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No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.1913 / Virus Database: 2113/4820 - Release Date: 02/19/12
[Non-text portions of this message have been removed]
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checkpoint2(at)comcast.ne
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| Posted: Mon Feb 20, 2012 11:39 am Post subject: Oil circuit? |
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I use the lower port for my true hobbs meter switch Bob Haas, Lighting.
From: James, Clive R
Sent: Monday, February 20, 2012 2:39 AM
To: jabiruengines(at)yahoogroups.com ; jabiruengine-list(at)matronics.com ; lightning-list(at)matronics.com
Subject: Oil circuit?
I’ll have a go:
Sump
Pump
Sender (original position)
Filter port out of crankcase, this is the OCA inlet, Relief valve (bouncing control valve for most engines, flows back to sump) This is from area under OCA or filter if OCA isn’t fitted.
If OCA or TOCA fitted through cooler. With early OCA (drilled bypass) and TOCA some (or all in case of TOCA) bypasses cooler.
| Quote: | From cooler or toca bypass into filter (outside)
|
next out of filter (centre) to feed oil gallery
Sender (new position) is on end of gallery
The gallery runs the length of the engine and taps off through multiple channels to feed up to mains and prop bearing, from there big ends, small ends, pistons
Off the gallery is also tapped the feed to the rockers on those engines, this runs through a transverse pipe and drips onto the valve springs (outlet above each spring) and from there into bottom of rocker boxes where it runs down push rod tubes back into sump (this was an area of much discussion during the mid noughties).
And off the gallery is the multiple feed down to the hydraulic lifters which we are learning so much about. From rod (socket) end of lifter it either drips away to sump (better with slotted end to rod) or feeds the:
hollow rods up into rockers to rocker shaft (nothing to valve guides apart from mist).
All over the moving parts any lost oil will return to the sump.
There you go, there is a good drawing in the later manuals, side view of crankcase. I suppose a schematic could be drawn.
What did I miss?
Regards, Clive
From: jabiruengines(at)yahoogroups.com [mailto:jabiruengines(at)yahoogroups.com] On Behalf Of Warren Butler
Sent: 20 February 2012 05:11
To: jabiruengines(at)yahoogroups.com
Subject: RE: [jabiruengines] Re: Ticking noise at start-up. Any ideas?
This question may be off topic a bit but I will ask it anyway. Much has been discussed about the ‘best’ oil pressure sender position.
Question: Can someone please explain to me the path taken by the oil from the sump, returning back to the sump, with key passage points en-route, such as sender, oil filter, oil cooler, rocker chambers, etc, etc.? That will help me get a better understanding of where the high and low pressure areas are.
Warren Butler
New Zealand
From: mailto:jabiruengines%40yahoogroups.com [mailto:mailto:jabiruengines%40yahoogroups.com] On Behalf Of sroydsmith
Sent: Monday, 20 February 2012 5:58 p.m.
To: mailto:jabiruengines%40yahoogroups.com
Subject: [jabiruengines] Re: Ticking noise at start-up. Any ideas?
Bernardo,
I moved my oil pressure sender off the engine entirely so it will not wear out with engine vibration. I plugged up the hole where the sender is "normally" located. I feed my sender via a line from the hole just below the "normal" hole. The hole provides pressure information AFTER the filter and the oil cooler.
There have been quite a few posts about this on the forum.
Steve
--- In mailto:jabiruengines%40yahoogroups.com <mailto:jabiruengines%40yahoogroups.com> , "Bernard Melendez, Jr." <n45bm(at)...> wrote:
| Quote: |
Hi Steve,
What is you "more intelligent" location for the oil pressure sender? Got any pics? Thanks.
Bernardo
--- On Sun, 2/19/12, sroydsmith <sroydsmith(at)...> wrote:
From: sroydsmith <sroydsmith(at)...>
Subject: [jabiruengines] Re: Ticking noise at start-up. Any ideas?
To: mailto:jabiruengines%40yahoogroups.com <mailto:jabiruengines%40yahoogroups.com>
Date: Sunday, February 19, 2012, 10:16 AM
 Needless to say, on my new engine I have the oil pressure sender in a more intelligent place. And I will never ignore a ticking sound again.
You live and you learn â€" or you don't.
Steve
[Non-text portions of this message have been removed]
|
_____
No virus found in this message.
Checked by AVG - www.avg.com
02/19/12
[Non-text portions of this message have been removed]
__._,_.___
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selwyn
Joined: 12 Mar 2008
Posts: 102
Location: Australia
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| Posted: Wed Feb 22, 2012 2:24 am Post subject: Re: Oil circuit? |
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Clive,
Only bit I would change is "hollow rods up into rockers to rocker shaft (nothing to valve guides apart from mist)."
There is a gallery in the rocker from the pushrod "seat" to the upper end above the valve stem so that most of the oil feed ends up emerging from the rocker above the valve stem. The system does not actually have a feed to the rocker shaft as the gallery is cut around the bore of the rocker and covered over by the bush. There is an modification to drill a small hole through the bush to provide an oil path from the gallery directly to the rocker shaft.
I could get into the hydraulic lifter discussion but my thought is that it is a bit sterile. Some people have passionate views on the advantages of mechanical vs hydraulic but there are millions upon zillions of these things happily going up and down in cars so I can't see why they wouldn't work in a humble Jabiru. I believe the Jabiru ones come out of a Chev, pretty basic engineering and not terribly touchy.
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Kit 66 VH-ELZ |
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ednan1(at)AOL.COM
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| Posted: Wed Feb 22, 2012 2:27 am Post subject: Oil circuit? |
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I'm not interested in the Lightning anymore. tks
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Clive J
Joined: 03 Nov 2007
Posts: 340
Location: UK
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| Posted: Wed Feb 22, 2012 3:48 am Post subject: Oil circuit? |
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Thanks Selwyn I stand corrected though the mod is what I have would
expected it to be like. I right in thinking nothing much goes to the
valve stem?
Regards, Clive
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selwyn
Joined: 12 Mar 2008
Posts: 102
Location: Australia
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| Posted: Fri Feb 24, 2012 4:59 pm Post subject: Re: Oil circuit? |
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Hi Clive. Sorry, I didn't mean to sound corrective, just that I've seen enough of these things in bits to learn a few details.
Without modifying the rocker shaft bush most of the oil flow would end up issuing from the top of the rocker as that is the low resistance path. The rocker shaft would be lubricated from the dribble and splash effect. Drilling a hole in the bush provides a direct path to the rocker shaft but this would be relatively restricted by the fit of the bush on the shaft so most oil probably still ends up coming out the top of the rocker. Just to be clear, by "the top of the rocker" I mean the upper tip of the rocker as it sits in the engine. The gallery exits here, not on the inner face which contacts the valve stem.
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