2007 BLT injector lash

[vrs180]

Hi

At the weekend I decided I would remove the cam shaft cover on my wife's 07 (61K) Fabia vRS and check for any signs of wear on the camshaft etc.

The great news is it was as good as new, with no sign at all of wear or scoring on the camshaft, rollers etc.

But.....while the top was off I checked the injector lash and was suprised to find all the injectors were set at 140 degrees.

The Haynes manual says the injector lash should be 225 degrees (ASZ engine code), however all internet searches I've done suggest a new revised (by VAG group) setting of 180 degrees.

I adjusted the injectors to 180 degrees and we have run the car for several days since.

The car starts and drives fine with no visible smoke, but compared to befor it's quieter running, smoother, pulls much stronger from idle speed to 3000rpm and has a much improved throttle response.

For peace of mind the car is booked in for a rolling road session to have the map checked.

Anyone got any ideas why our car has seemingly come supplied from new with the wrong injector lash settings ???

Or are all the BLT engine code vehicles set from new with 140 degree injector lash ???

[coskev]

Does seem strange, as with some age related wear it should be a bigger angle if anything,not smaller!

I wonder if it has had new injector seal kits fitted?

As these come with new top hats for the injectors,just thinking perhaps with a aftermarket slight manufacturing tolreance difference and then they haven't reset the lash?

[hutchysrs50]

I'll be doing mine soon so will be able to check my BLT and report back!

[vrs180]

Kev

I think you are right, some sort of injector related work must have been done prior to us buying the car.

We bought from a Skoda main dealer, it was less than two years old and had done 12k with one previous owner. The dealer had sold the car from new and done all servicing etc, they told us it had not required any warranty work prior to us buying it.

Hutchy

It will be interesting to see what yours are set to.

I'm not sure in what year the revised injector lash setting was adopted, but if yours is untouched from new it will prob give us a good idea.

See you are in the North east, I live in Guisborough, if you need to borrow my DTI gauge you are welcome (I used a DTI because my eyes are not what they used to be, but in all honesty a DTI is not essential).

[mogwye]

I had to re-set the Lash on my 1.4 TDI and I asked the foreman at a local Mercedes garage and he stated 180', and it runs very well with good MPG.

 

DB.

[vrs180]

We think our car also runs better with the injectors set to 180 degrees, it's much quieter now, revs much more freely and seems to have a bit more go about it from idle speed to 3000rpm.

The trip computer indicates the mpg has improved also, but I'm slightly sceptical at the moment and won't be convinced until I can do my own calculation.

One other thing I have noticed is the Miltec exhaust tail pipe is not getting quite as black/sooty as it used to, I'm a bit OCD about such things and keep a cloth in the boot to give them a wipe after most journeys (sad I know).

The only concern I have is it may now be slightly down on power from 3000rpm upwards but I'm really not sure.

It's booked in for a 2hr rolling road session on Friday 1st July and to have the map adjusted as required.

The place it's going to is the same place it went to be mapped after I fitted a Garrett GT1749VB in September 2015, so it will be interesting to see what actual effects adjusting the injector lash has had on the engine performance.

For info; previously the car recorded 195bhp @ 3733rpm & 410Nm @ 2248rpm.

[vrs180]

Hi

Just thought I'd update this thread now I have the results of the rolling road session carried out earlier today. Its all good news.

The car went back to the same tuner that remapped it 9 months ago (Big Fish Tuning) post GT1749VB and they were able to overlay the previous power/torque graph with todays results.

Without any adjustments to the map the engine torque had increased by 10Nm and power increased by 2bhp.

Perhaps more significantly though, was seeing just how much adjusting the injector lash had effected torque rise ie; torque builds much more rapidly than before and starts from lower down in the rev range.

 

My conclusion is:

The increases in both peak power and torque are relatively small, but importantly they are increases, and when combined to perhaps the slightly more significant fact that the torque band "width" has increased, I think checking the injector lash adjustment is very much worthwhile (especially considering how easy it is to do and how little time it takes to complete).

[mogwye]

Official VAG Injector Lash info http://workshop-manuals.com/volkswagen/golf-mk5/power_unit/4-cylinder_diesel_engine_(1.9_l_engine)/fuel_preparation_system_diesel_injection/diesel_direct_injection_system/adjusting_non-contact_gap_of_unit_injectors/

 

DB.

[hutchysrs50]

Starting doing my engine build last night, just stripping down stages but should be able to find out soon enough what mine are set to. Im replacing the "top hats" as they have been called on the injectors as im replacing all the seals anyway and they come in the kit so they will need setting again anyway

[mogwye]

Starting doing my engine build last night, just stripping down stages but should be able to find out soon enough what mine are set to. Im replacing the "top hats" as they have been called on the injectors as im replacing all the seals anyway and they come in the kit so they will need setting again anyway

 

Don't forget VAG stipulate that the Adjusting Studs also need replacing with the aforementioned Top Hats because they both suffer from wear, as indeed mine were.

 

DB