Zdravko Der Stvenssek custom services

Zdravko Der Stvenssek custom services Custom services

QuickShiftOn this picture you can see a "robot" that is fitted on some "manual gearboxes" of car models - in this case R...
21/01/2026

QuickShift

On this picture you can see a "robot" that is fitted on some "manual gearboxes" of car models - in this case Renault brand. System is great solution for all of those people who have disabilities and they cant easy press clutch pedal OR they simply have motorical problems to drive regular car with manual gearbox. Well we have it at home for fun because we want to be different. :-)

Anyway these roborts with proper maintenance are bulletproof... Too many times (last year -2025- we saved 6 of them) became problem to mecanics because of unsufficient knowledge. As simple they can be they still require some knowledge. Sistem includes Hi pressure pump, pressure accumulator, few sensors and valves so nothing special but thogether they can lead to the point that authorised dealer raise their hands and say it cant be fixed and repair costs will be more than it is car value.

Well until those mecanics dont mess up to many thing the repair is very simple and cheap at the same time. Only "problem" that occure is waiting time for spare parts to came from France where ALL parts are available.

In case you want to own a car with this type of gearbox you are nothing to be afraid of. We can help you with maintenace and repars. Until this day ALL of these robots were fixed on our jard.

Tested!

Today was a special day.... First customer have pick up first Reja trailer made in Slovenia with VIN number ..001. It wa...
23/07/2025

Today was a special day....

First customer have pick up first Reja trailer made in Slovenia with VIN number ..001. It was a special moment for all involved in process of production.

We wish Mr. Grdina many happy miles!

On picture is Mr. Bostjan Reja and Mr. Bostjan Grdina.

New is Slovenia!In city Sežana, near Italian border is growing new Reja Trailer factory specialised for custom producti...
18/07/2025

New is Slovenia!

In city Sežana, near Italian border is growing new Reja Trailer factory specialised for custom production of trailers.

As a long known business partner we were invited to help with end production. Any manufactured item can have improvements and together we moved that on higher level. This week first of trailers was manufactured and it is kind of special feeling reading out numbers 1 and 2... I hope we will write history together in many more future projects.

On customers wishes these trailer was equipped with Wabco TEBS systems and additional rear stabilisator. All the electric (lights) parts are standart ASPOCK production so spare parts in case of problems can be available in any truckparts store. This particular trailer is 1 axle (12t), made for hauling 20ft and 40ft containers in light weight edition of only 3100kg and total allowed 20500kg (with restrictions of regional laws).

Tested!

With new trucks and technology came new challenges. One of problems that can occure is crack on brake module. Main probl...
17/05/2025

With new trucks and technology came new challenges. One of problems that can occure is crack on brake module. Main problem is an air leak and often cannot be repaired but only fixed by replacing with new spare part. New housing cannot be bought as a spare part and in this case complete new module must be installed. With replacement comes programimg of new module and usualy few other faults poops out like worn electric wires or leaking suspension airbags. Regular maintenance is the key to safe and cheap freight. First sign of failure on air system is an air leak that in some occasions is not even possible to hear but air pressure on trucks reservoairs after few hours became too low. Second sign is loosing height of the trailor while parked. Often there is more than just one problem because drivers dont give attention to these things and if with these faults inspection on the road is done, repar bill will be way higher.

Tested!

Today I was solving our truck. Problem? Algs and fungi in diesel.Truck is used for show purposes mostly so it doesn't ru...
28/03/2025

Today I was solving our truck. Problem? Algs and fungi in diesel.

Truck is used for show purposes mostly so it doesn't run daily. After "winter sleep" it did not want to start or collect fuel pressure. After investigation there was clogged fuel filters, full of algs and fungi what is result of biodiesel mixed with regular diesel in gas station. Just for information - filters were 2 years old and had only 3000 driven km, before fuel tank and complete fuel system was drained, cleaned and noncontaminated.

I have now added additive - blocker for algs and water extractor by DATACOL.

Now it runs like it should

Tested!

We have repaired drivers seat, foam was deformed, so seating was uncomforable. Many times can be used genuine - used foa...
19/01/2025

We have repaired drivers seat, foam was deformed, so seating was uncomforable. Many times can be used genuine - used foam from co-drivers seat from other used car that was damaged somehow and vehicle is dissasambled. On many models are both foams the same. In this case fabric on the seat was in great shape so it was an easy fix.

Driving experience is restored to new again.

04/01/2025

Video by https://InsaneDiesel.com What is DPF?What is DEF?What is EGR, and what is SCR? They are EPA Emissions Controls added to your diesel performance truc...

Emission problems?It was quite challenging to solve this one. With only 260.000km on the dash it was sentenced to 15 mon...
11/12/2024

Emission problems?

It was quite challenging to solve this one. With only 260.000km on the dash it was sentenced to 15 months around many dealers not fixing the problem - after 80km every single time engine torque limit hited, speed limited to 20km/h... It takes a lot of time and knowledge to find sequence of events that leaded to this. After all components related to emissions were changed by other dealers fault was keep on coming back and we need to dissasamble whole exaust system, wiring and engine intake system to check again other peoples work. Discover leaded to major discover of serious fault that previous mecanic made. It was not heavy work but puzzle was solved and now runs without problem.

Tested!

K-Jetronic... past mistery of bad idling, high emissions and lack of power. Most common fault is leaking seals, bad memb...
13/08/2024

K-Jetronic... past mistery of bad idling, high emissions and lack of power. Most common fault is leaking seals, bad membrane and bad fuel pump, sometimes even injectors. But always first check engine's breathers. Minimal leakage means bad engine performance.

Unit renewed, new set of seals, new adjustments. End result: great.

08/10/2023

Sometimes all it takes is to touch an old soul and batteries are recharged.

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