Land Rover ACE Removal (Deletion)

Last modified on July 22nd, 2023

Some models of the Land Rover Discovery 2, (and some versions of Range Rover) are fitted with ACE. This is an Active Cornering Enhancement system. When it fails, (often due to old age and corrosion), the system can be expensive to replace. However, parts are available, that allow you to remove the ACE system (and convert back to a ‘non’ ACE system). This article covers the removal and replacement and shows you what parts are needed.

This involves the removal of:

• The ACE anti-roll bars.
• Hydraulic rams (attached to the roll bars).
• The hydraulic pump.
• and some ancillary items.

Topics:

• The ACE Pump:
  • Table of Part Numbers:
  • Additional Bolts Required (Td5 only):
  • The Torque Values (Td5 only):
• Anti Roll Bars:
• Ordering Parts:
• Abbreviations:
• Image Gallery:

Notes:

• This article covers the Land Rover Discovery 2.
• The system is fitted to some Range Rover models.

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The ACE Pump:

The pump can be easily removed from the vehicle, as it’s only held in place with three bolts. There are two hydraulic pipe connections, (inlet and outlet) that will need to be disconnected. Before removing the pump, the drive belt needs to be removed, (and replaced with a different sized belt).

Topics:

• Pump removal from the Td5 Engine:
• Pump removal from the V8 Engine:
• Replacement Part Numbers:
• Additional Bolts Required (Td5 only):
• The Idler Pulley Wheel & Bracket Torque Values (Td5 only):

Pump removal from the Td5 Engine:

• The ACE hydraulic pump will need to be replaced with a ‘Bracket-idler mounting ancillary drive’ (an idler pulley wheel).
• Also required are three mounting bolts for the idler pulley wheel, as the bolts used to mount the ACE hydraulic pump are way too long for the replacement idler pulley wheel.
• A new shorter Drive Belt will also be required. The size of the drive belt is dependant on the ancillaries fitted\removed from your vehicle (air conditioning, ACE). These ancillaries will dictate the length of drive belt that will be need to be fitted, (see the table below).

Pump removal from the V8 Engine:

• A new shorter Drive Belt will be required. The size of the drive belt is dependant on the ancillaries fitted\removed from your vehicle (air conditioning, ACE). These ancillaries will dictate the length of drive belt that will be need to be fitted, (see the table below).
• An additional idler pulley wheel is not required unless you’re deleting, or adding air conditioning (see the table below).

What Land Rover ACE Parts do I Need?

See the table below, for a guide on what fits and the different part Numbers:

ACE Pump & Drive Belt – Table of Replacement Part Numbers:

Land Rover ACE (Active Cornering Enhancement) Pump Removal – Part No’s for Discovery 2
Engine	Item	Fitted?		Part No.	Notes
		Air Con	ACE
Td5	= Non ACE parts
	Bracket Idler Mounting Ancillary Drive	Yes	–	ERR6949	A pully wheel that replaces the ACE Pump.
		–	–	ERR6949
	Drive Belt	–	–	PQS101490
		Yes	–	PQS101500
		Yes	Yes	PQS101510
		–	Yes	PQS101520
	Idler Assembly Timing Belt	–	Yes	ERR6493	Only required if deleting Air Con.
V8	Drive Belt	–	–	ERR6899
		Yes	–	ERR6898
		Yes	Yes	ERR6896
		–	Yes	ERR6897
	Adaptor Idler Mounting	–	Yes	ERR6456	Only required if deleting Air Con.
	Pulley Idler Ancillary Drive	Yes	–	PQR101150	Only required if adding Air Con.

See the section ‘Ordering Parts‘ for cost & availability:

ACE Pump Removal – Additional Bolts Required (Td5 only):

On the Td5, when you remove the ACE pump, you have to fit an idler wheel. This requires 3 new bolts, as the original pump bolts are too long…

ACE Pump Removal – Table of Old & New Bolts Required (Td5 only):

ACE Pump Removal – The Idler Pulley Wheel Bolt Sizes (Td5 only)
Used for:	Size	Pitch	Grade	Length	Min Thread	Qty	Notes
ACE Pump (Original size)	M8	1.25	8.8	102 mm	–	x 3	See note 1 below
Bracket-Idler Mounting Ancillary Drive (New size)	M8	1.25	8.8	50 mm	25 mm	x 3	An idler pulley wheel & bracket that replaces the ACE pump (Td5 only). See notes 1 & 2 below

See the section ‘Ordering Parts‘ for cost & availability:

ACE Pump Removal – The Idler Pulley Wheel & Bracket Torque Values (Td5 only):

You can look up the torque values for a particular size and grade of bolt. However, the values are often shown for screwing the bolt into steel. The ‘Bracket-idler mounting ancillary drive’ (an idler pulley wheel), screws into an aluminium housing. Therefore, a lower torque value for screwing into aluminium is required…

Note:

• The original ACE pump bolts have a M8 thread but an M6 bolt head. This may indicate that an M6 torque should be used, (probably due to a steel bolt screwing into an aluminium housing).

The Idler Pulley Wheel – Table of Torque Values (Td5 only):

ACE Pump Removal – The Idler Pulley Wheel Torque Values (Td5 only)
Used for:	Bolt Size	Wrench Size	Bolt Grade	Torque		Notes
				Nm	ft-lbs
Bracket-Idler Mounting Ancillary Drive (An idler pulley wheel bracket that replaces the ACE pump).	M8	13mm	8.8	10	7.4	Torque value for an M6 Bolt. See note 1 & 3 below
Pully Wheel Bolt.	M10	17mm	8.8	25 to 40	29.5	See note 2 & 3 below

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Anti Roll Bars:

The anti roll bars on vehicles fitted with ACE (Active Cornering Enhancement), have to be replaced with non-ACE anti roll bars, when parts of the ACE system are removed or disabled. The original front and rear ACE anti roll bars will not perform correctly when an ACE system is disabled, as the hydraulic actuator arms will no longer Work.

Land Rover ACE Removal – Anti Roll Bar Part No’s for Discovery 2

Land Rover ACE (Active Cornering Enhancement) Anti Roll Bar – Part No’s for Discovery 2
Engine	Position	Item	Fitted?				Part No.	Notes
					Suspension
			Seats	ACE	Air	Coil
TD5 & V8	= Non ACE parts
	Front	Anti Roll Bar	–	–	–	–	RBL101370
		Link Assembly	–	–	–	–	RBM100223	Fits all Front
			–	Yes	–	–
		Bush Bracket	–	–	–	–	RBU100240	Fits all Front & Rear
			–	Yes	–	–
		Bush	–	–	–	–	RBX101690
			–	Yes	–	–	RBX101181	ACE only
	Rear	Anti Roll Bar	7	–		Yes	RGB000180	From VIN 2A736340
			–	–	Yes	–	RGB101310
			–	–	–	Yes	RGB101320
		Link Assembly	–	–	–	–	RGD100682	Fits all Rear
			–	Yes	–	–
		Bush bracket	–	–	–	–	RBU100240	Fits all Front & Rear
			–	Yes	–	–
		Bush	–	–	Yes	–	RBX101700
			–	–	–	Yes	RBX101710
			–	Yes	–	–	RBX101181	ACE only

Note:

Unfortunately, I have seen a few articles which appear to suggest that just removing the ACE pump is all you need to disable the system. This is incorrect…

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Ordering Parts:

If you’re not sure what parts you need, sometimes it’s a good idea to have to look at what’s available? The tables below may give you an idea of what you can get, what they look like and how much they cost…

Don’t forget it’s important to check the part numbers where you can, to ensure you’re getting the right item.

Ordering Parts – Examples of what you can buy & how much they cost:

The Parts are Grouped by Engine Type:

• Both:
• Td5:
• V8:

Notes:

The links in the tables below are “affiliate links” This means we may garner a small commission (at no cost to you, if you choose to make a purchase). This gives me a small reward for producing this information. If you do not wish to purchase anything, it’s still worth having a look to see what’s available and how much it costs… Thank you for your support.

Both Engine Type Parts:

These parts fit the Land Rover Discovery 2, with either engine. You may still need to make sure the part fits, dependant on how the vehicle is configured. Such as, whether it fits the front or rear, has air conditioning, has air suspension or coil springs. If in doubt, consult the tables above…

Table of Parts That fit Vehicles With Both Engine Types, V8 or Td5:

ACE Deletion Discovery 2 Parts (Both engine types)
Engine	Item	Location
Parts that fit Both Engine Types	Kit of Parts – A ‘kit of parts’ can vary, so please check that the kit fits your vehicle and that you have all the parts you need…	UK Prices
		US Prices
		AU Prices
		CA Prices
		IE Prices
	Anti Roll Bars – Front & Rear – Please check for the correct parts, front, rear etc…	UK Prices
		US Prices
		AU Prices
		CA Prices
		IE Prices

Td5 Engine Type Parts:

Specific to vehicles fitted with a Td5 diesel engine:

Table of Parts That fit a Vehicle With a Td5 Engine:

ACE Deletion Discovery 2 Parts (Td5 Engines)
Engine	Item	Location
Parts That Fit the Td5 Engine	Idler Pulley Wheel (Bracket Idler Mounting Ancillary Drive) – Land Rover Part No. ERR6949	UK Prices
		US Prices
		AU Prices
		CA Prices
		IE Prices
	Idler Pulley Wheel Drive Belt – Land Rover Part No. PQS101490 or PQS101500 – If in doubt, please check for the correct part No’s in the table above…	UK Prices
		US Prices
		AU Prices
		CA Prices
		IE Prices
	New Bolts (For the Idler Pulley Wheel) – M8 x 1.25 Grade 8.8 50mm Long (min thread length 25mm) – There may be mixed results, so please check against the specifications listed above…	UK Prices
		US Prices
		AU Prices
		CA Prices
		IE Prices

V8 Engine Type Parts:

Specific to vehicles fitted with a V8 petrol engine:

Table of Parts That fit a Vehicle With a V8 Engine:

ACE Deletion Discovery 2 Parts (V8 Engines)
Engine	Item	Location
Parts That Fit the V8 Engine	Drive Belt – Land Rover Part No’s. ERR6899 or ERR6898 – If in doubt, please check for the correct part No’s in the table above…	UK Prices
		US Prices
		AU Prices
		CA Prices
		IE Prices

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Abbreviations:

• ACE – Active Cornering Enhancement.
• Air Con – Air Conditioning.

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Image Gallery:

– click or tap the image to view full size –