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Def90



Member Since: 17 Jan 2015
Location: Kent
Posts: 258
United Kingdom 2015 Defender 90 Puma 2.2 SW Corris Grey
2.2 TDCI Vacuum pump question
Hi anyone with in-depth knowledge of the vacuum pump on a 2.2 TDCI

The vacuum pump fitted to the rear of the Ford 2.2 TDCI engine part number ford BK3Q-2A451-DA or LR LR029681
has two outlets, one is 9.89mm and is connected to the brake servo, the other is 7.89mm and has a blanking plug fitted to it.


Click image to enlarge

Can the smaller 7.89mm outlet that has a blanking plug fitted to it be used for a secondary vacuum supply whilst still using the other larger outlet for the brake servo?


Click image to enlarge

Thanks in advance
Post #915490 4th Aug 2021 6:21pm
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Dinnu



Member Since: 24 Dec 2019
Location: Lija
Posts: 3409
Malta 2012 Defender 90 Puma 2.2 CSW Santorini Black
I guess depends how much leakage the 2nd connection would create. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black
Post #915498 4th Aug 2021 7:06pm
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3670
United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
It’s a relatively small pump, so as Dinnu says, it would depends on what you want to use it for. I’d be surprised if there is any extra capacity, but having said that it might be worth cross referencing with a transit workshop manual to see if they already run 2 systems from it.
Post #915557 5th Aug 2021 5:10am
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hank



Member Since: 12 Sep 2016
Location: South Wales
Posts: 2292
Wales 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
On my 2.4 the pump generates a surprising amount of vacuum (put your thumb over the pipe when it's running Shocked )

The servo doesn't need a huge vacuum so I would suggest it would run a secondary vacuum provided it doesn't need a huge volume. I'll be interested to hear if it works > 110 XS Double Cab
Post #915602 5th Aug 2021 10:54am
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Def90



Member Since: 17 Jan 2015
Location: Kent
Posts: 258
United Kingdom 2015 Defender 90 Puma 2.2 SW Corris Grey
The vacuum pump appears to be used in a few ford power units and in the Ranger 2011-2015 they use both take offs.

I think I will give it a go but check the vacuum on the brake servo side before and after with a vacuum gauge.
Post #915869 6th Aug 2021 10:27pm
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