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
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