Cleaning up the front axle area, waxoyl

In an effort to keep the inevitable Mercedes rust away I’ve been working my way around the van dealing with rust and preventing it where I can prior to respraying the bodywork.

A combination of a wire brush collection, Jelonite rust converter, Waxoy, Hammerite spray paint and a few other products have been used to clean up the areas around the drivetrain and also respraying our steel wheels black. Taking on a family member’s advice I’ve treated the brake lines with Waxoyl from front to back, especially around the supporting brackets. The exterior areas of the brake callipers have also had a quick coat of rust converter and paint as they were looking terrible.


T1N or 2005 Sprinter alternator – regulator replacement

It turns out that regardless of what rated ampage your alternator is if you have a Bosch BR14-M3 alternator fitted then they all take the same regulator.

Common reasons to replace the regulator are if the brushed are worn down or (like ours) if the diodes begin to breakdown and you either get voltage issues or a current leak causing a flat battery when parked up.

The Bosch part number for the new regulator is F00M144139 which supersedes  F00M145248 which is what I had fitted. This regulator is suitable for 90/120/200A units.

Bosch won’t release or send out spec sheets but details can be confirmed with them direct, just speak to their automotive technical department:
Automotive Aftermarket
Address: Robert Bosch Ltd
Broadwater Park
North Orbital Road
Denham, Middlesex
Tel: 0844 892 0115

Aligning driver/passenger doors and respraying wheels

If you van is a few years old then the countless number of times people have hauled themselves into the van using the door will likely have caused it to drop. A good symptom something is wrong is if your doors bounce open when you close them occasionally. When the door is nicely aligned you have an equal gap around the door when it is closed, the door latch pin will be central and it closes with ease.

There are a few good guides on Sprinter Source (as usual), the top two chrome bolts are for the wing mirror, the third hidden wing mirror bolt is behind the black circular black plug.

That leaves four bolts two at the top, and two at the bottom. I undid all four, jacked up the door and set the door to the middle of the door frame, I then jacket the corner of the door up and set the angle, and thus set the door pin to the right height and tightened up the bottom two bolts. Time taken is about 5 mins per door. I highly recommend unbolting the mirrors to set their height to ensure that they fold correctly and don’t pinch on the mirror join.

Next up was  to treat and paint our wheel rims. The steel rims were gnarly and rusty, they needed to be sanded down with a grinder and wire wheel, sanded some more, treated with rust converter and then painted with rust protecting paint. Painted black because I didn’t have any silver… Central hubs were also treated in a similar way, then the wheel studs were greased up and the wheel nuts reapplied. Don’t forge that there are small cone washers behind each wheel nut and to jack on the correct point. For reference our wheel rims are marked 5 1/2 Jx15H2 HMA 115.


Here are a couple of useful PDFs for those looking to also tweak their doors: Driver / passenger adjustment and Door Adjustment Supplement 2002-2006 (all other doors).

Next on the list, gearbox and differential fluids

Strangely the standard glovebox manuals for mk2 Sprinters are largely devoid of any useful data in the fluids department. I am very used to going to a page in the handout that just tells you what you need. MB apparently feel the need to hide everything.

Looking into gearbox oil changes on a manual gearbox I’ve been told you need ~1.8L of oil and loads of people recommend genuine MB oil (MB part number A001 989 26 03 10). MB themselves stated the gearbox is apparently “sealed for life” however the oil really should be changed at least once every ten years! For third party oils it needs to comply with MB 235.10.  I’m aiming to grab some of this from ECP: Febi Bilstein Transmission Oil (21829 Manual Transmission Fluid GL4 SAE 75W). There’s a great guide to changing the oil out on Sprinter Source.

Differentials oil on a 2005 Sprinter should comply with MB 235.0 and should be synthetic 75W90, you need 2-3 quarts for a differential.. I am aiming for TRIPLE QX Fully Synthetic 75w-90 LS – 5Ltr from the local EuroCarParts. Whilst doing a bit of research on the differentials I came across this great article which covers the whole process nicely: