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 Post subject: best central oil pickup?
PostPosted: Tue Jun 28, 2011 10:47 am 
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I seem to recall that some of the central oil pickups are prone to getting clogged due to the fine mesh they put over the pickup.

Can someone recommend one brand over another?

Thanks.

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PostPosted: Tue Jun 28, 2011 1:07 pm 
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The 'newer' ones can be modified to increase pick up area. Take off the mesh - cut tube as so :

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replace mesh further up the tube to cover the cut

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PostPosted: Tue Jun 28, 2011 1:52 pm 
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The factory ST ones don't fit all rod shift boxes anyway. You usually have to make your own.

The mesh is needed, not a good idea to remove it, it's a good way to lead to a broken pump drive.

If your worried about the mesh clogging, just be sure change your oil more often.

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Last edited by GT mowog on Thu Jun 30, 2011 10:18 am, edited 1 time in total.

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 Post subject:
PostPosted: Tue Jun 28, 2011 2:10 pm 
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GT mowog wrote:
The mesh is needed, not a good idea to remove it, it's a good way to lead to a broken pump drive.


I didn't say leave it off - you have to take it off to cut a chunk off the pipe - then solder it back on - better than having it hanging off the end of the tube like a spent condom.

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PostPosted: Tue Jun 28, 2011 3:38 pm 
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Just be careful to not cut the pipe too far back towards the bend - otherwise you're undoing the whole benefit of having a "centre" pickup after-all!

cheers,

Jacob

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 Post subject:
PostPosted: Tue Jun 28, 2011 3:42 pm 
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Wombat wrote:
I didn't say leave it off - you have to take it off to cut a chunk off the pipe - then solder it back on - better than having it hanging off the end of the tube like a spent condom.


8) my bad, so you did :P

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PostPosted: Tue Jun 28, 2011 6:55 pm 
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Some Minis and 1100's have a factory fitted centre oil pickup. :D

The Auto ones.

No it doesn't fit a manual. :D

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 Post subject:
PostPosted: Tue Jun 28, 2011 8:42 pm 
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I have an early centre oil pickup (see wombat's pic, + add mesh) in the 1412 and the later one (with horizontal entry) in the 1360.
I change my oil every 1500 miles, and I'm damned if I can tell any difference between them for fast road use. They both work. 8)

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 Post subject:
PostPosted: Thu Jun 30, 2011 10:17 am 
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GT mowog wrote:
The factory ST ones don't fit all rod shift boxes anyway.


They miss by this much

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 Post subject:
PostPosted: Thu Jun 30, 2011 2:07 pm 
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I have had to bend early Minispares ones at the bottom to miss reverse gear when engaged. Not hard to do, but needs checking before bolting the lot back together. Otherwise the mesh can get chewed.

Later one I bought fitted OK.

[edit] this was in 4 synchro remote boxes

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Last edited by drmini in aust on Fri Jul 01, 2011 7:10 am, edited 1 time in total.

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 Post subject:
PostPosted: Thu Jun 30, 2011 11:58 pm 
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Where exactly do these oil pick ups lead, straight to the pump?
It looks like they come out the side of the box.

I haven't really ventured below the crank yet :oops:


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PostPosted: Fri Jul 01, 2011 7:13 am 
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Above that flange inside the gearbox, there is a drilling through the top flange. An O-ring seals that to the block, and there is a further oil passage cast into the block which leads to the pump intake.
Pump is mounted at the rear end of the camshaft.

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 Post subject:
PostPosted: Fri Jul 01, 2011 11:01 am 
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What sort of pressure is there? same as the other side of the pump?


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 Post subject:
PostPosted: Fri Jul 01, 2011 11:33 am 
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Nope there is vacuum there, as the pump is well above the oil level and has to suck it up.

BTW the main reason for fitting these centre pickups is to avoid loss of oil pressure on hard RH bends, roundabouts etc. That happens because the standard pickup is in a stupid place, in RH front corner of box. On RH bends the oil migrates to the LH side of the box, which is pretty much empty of parts on all Mini boxes.
If you are a spirited driver and you can't afford or it's inconvenient to fit a centre pickup, my advice is keep the oil level ABOVE the full mark, at all times. Particularly so on rodchange boxes.
Low oil = no oil pressure on RH bends = stuffed big end bearings and worn crankpins. I've stripped a few low mileage engines that suffered for this reason.

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 Post subject:
PostPosted: Fri Jul 01, 2011 1:20 pm 
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drmini in aust wrote:

That happens because the standard pickup is in a stupid place, in RH front corner of box.


I agree 100% with the Doc here. It is stupid, considering the fix is damn easy!

This is where the stock pipe picks up from. The black / red smudge area is where the centre pick up pipe picks up from.

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