Haldex

RUM4MO

Active Member
Jun 4, 2008
7,974
1,067
South Scotland
Thanks guys I'll ask for a vaq dif oil change then
Maybe the smart plan would be to get a proper VW Group Indie to carry out this task as you could ask them to remove and clean up the pump or at least its screen and perform basic settings after refilling the system. The wise ones will be already including that during a front diff coupling fluid change.

I'd doubt if any Cupra approved SEAT dealership workshop would any thing other than just dropping the oil out and refilling and checking the level at the correct oil temperature. If I'm wrong on how much Cupra approved dealerships workshops are willing to do, then please correct me.
 
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Burne

Active Member
Sep 29, 2022
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Interestingly enough the VAQ front differential is made by Haldex. Seat recommend changing this after 3 years or 30k (but there is a lot of different info around). There are quite a few threads on this on the forum: https://www.seatcupra.net/forums/threads/vaq-diff-service.445565/

Even the Haldex site has different info re service intervals :) https://www.haldexrepairs.co.uk/gui...on-golf-gti-autobahn-seat-leon-skoda-octavia/

I recently had my front diff oil changed/serviced at a local indy (this was after 4 years as the dealer missed it at 3). It was £150 incl VAT but that is London prices.
 

RUM4MO

Active Member
Jun 4, 2008
7,974
1,067
South Scotland
Just to clarify and add reason for the need for a VAQ diff fluid change, the unit in the front differential is a Haldex product so uses friction clutch plate packs, as they end up contaminating the fluid with "bits/debris", then the fluid requires replacing at a certain interval, the official plan, as far as I know, is to just drop out the oil fluid, fit new drain plug, refill with new fluid and run the car to heat the diff back up to a reference temperature, stop the engine and top up the fluid until it comes back out of the fill/level point, then fit a new fill plug. This system does not have a filter that get replaced at the same time unlike the Haldex 4WD controller coupling, this simpler version just relies on a plastic screen/sieve that is screwed to the intake side of the fluid pump, so that means that with time, "bits/debris" captured by this screen/sieve will reduce the pump's ability to work as intended. That is the reason why it is a smart idea to remove the pump and clean its screen/sieve of the captured "bits/debris". It has been said that leaving that screen/sieve cleaning out of the maintenance task could lead to eventual pump failure as its intake is now getting choked. At the least, I'd think, a reduction in "clamping" of the clutch pack will happen if that screen/sieve is not cleaned of "bits/debris".

There is plenty of advice out there on the internet along with a list of parts that should be contained in a "service kit" to carry out this job, ie correct fluid, fill and drain plugs, 2 O-ring pump fitting seals, 2 pump securing bolts.
 
Lecatona HPFP (High-pressure Fuel Pump Upgrades)