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7 votes

What effect will removing my EGR have?

As a vehicle technician for BMW I can assure that it is good for your engine to get rid of EGR. EGR systems are there to improve the exhaust gas quality and slightly win a few miles on a tank (in ...
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6 votes

How often do I need to change my oil in a VW TDI?

Hi I'm a VAG mechanic 20 years experience, all the TDI engines need to be serviced every 30.000 KM if you are using 5w30 iso 500 to 504. DSG every 60.000 KM. Fuel filter, air filter, and cabin filter ...
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  • 61
5 votes

Troubleshooting Low Turbo Boost

Some thoughts on how to verify if you have... an intake obstruction Disconnect the air filter (keep the MAF in place) to expose the compressor inlet and log boost values with the car at idle and ...
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  • 39k
5 votes

Turbo Failure Modes (VW TDI VNT15)

Is there any way that the vane actuator could be moving and yet not actually moving the vanes, or is it a positive linkage? There is a positive linkage, but it doesn't mean it isn't working right. ...
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5 votes
Accepted

Golf mk3 TDI has pressure in the cooling system

tl;dr: Your radiator cap might be working as advertised and releasing a bit of overpressure. The difference is points one and two is telling. In point two, you're explicitly staying out of boost on ...
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  • 24.3k
5 votes

Reverse is now 1st gear on manual transmission

A little research leads me to believe (aka I could be wrong) that reverse gear in this car requires you to depress the shift knob and move it far left-forward. It also seems that some, but not all '02 ...
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  • 6,017
5 votes
Accepted

Is it a good idea to switch to 5W-40 engine oil from 5W-30 after hitting 120k miles?

Will changing to the 5w-40 hurt the engine? Most likely not. Should you change to it? I my humble opinion, no. Here's the thing ... the manufacturer has said 5w-30 (assuming that is correct) is the ...
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4 votes
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2006 VW Jetta TDI EGR cleanup

Get a bunch of carburetor cleaner and some oil picks Really, it's not a big job but it's a little nasty. Having some metal mixing bowls to put the EGR into when you spray it down will help to ...
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  • 32.8k
4 votes

Remove/Replace engine wiring harness on '02 VW Jetta TDI

I'm biased based on my experience, but perhaps it might be helpful. I spent time in the Army troubleshooting (and teaching mechanics to troubleshoot) vehicle electrical systems. After that job I ...
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  • 6,499
4 votes
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Egr valve cleaning (2.0Tdi 2005)

If you take it off of the engine, your best bet is to clean it with carb cleaner. Don't submerge it in anything, as you can cause damage to any diaphragm seals which may be present (if vacuum operated)...
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4 votes

Drawbacks/weaknesses of TDI 1.6 engine in VW Golf Mk 7 (2015)

Fundamentally the engine is a pretty robust unit - but something to check thoroughly is whether it as affected by the "Dieselgate" scandal, cars that have had the recall "fix" done have significantly ...
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  • 9,773
3 votes
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VW Mk4 TDI (ALH) – Suggestions for Removing Stuck Water Pump

So what ended up working for me was to cut a piece of 1x2 lumber (I couldn't fit a bigger piece from above) about 24" long and I braced it against the pump drive cog and pounded on it with a five ...
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  • 14.3k
3 votes
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What is the cost of general maintenance on VW Jetta TDI (diesel)

According to the 2013 TDI maintenance schedule for US market (PDF, via tdiclub.com), oil and filter changes occur every 10 000 miles (synthetic only, which allows for higher mileage between changes), ...
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  • 2,380
3 votes

Golf mk3 TDI has pressure in the cooling system

Old topic, but just had the exact same problem on a 1.9tdi 110. The problem occured only under load, and certain driving conditions "pushing" the engine harder. We changed everything, cap, thermostat, ...
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3 votes

2011 tdi clutch noise when clutch is out

You may find that the throw-out bearing is the culprit, based on your description. As you've noted, slight pressure on the pedal causes the bearing to seat in the races, creating quiet. When that ...
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  • 3,592
2 votes

2008 VW Golf - no ignition lights on dash

I just starting having this trouble with my 2008 Golf 1.9 TDI. Had to call NRMA service but when he arrived checked the battery and all was fine. Couldn't find an ignition fuse to get the ignition up ...
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  • 21
2 votes

What effect will removing my EGR have?

You might find this post about Dynamic EGR Control for TDIs on the TDI Club forums by Mark at Malone Tuning interesting. Mark reports on his experiments with the EGR system on a 2006 TDI. He reports ...
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  • 14.3k
2 votes

Reverse is now 1st gear on manual transmission

Before adjusting linkages, I would inspect your bushings. A missing or damaged bushing might cause this, and they are rather easy to replace. You will have to pull the battery and tray to get to the ...
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  • 2,095
2 votes
Accepted

Unknown actuator on golf mk3 tdi 110hp

I found out what it is. It controls the air recirculation flap to the cabin. Nothing to do with the engine at all. Just above the input and output pipes to the heater core on the firewall is a little ...
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2 votes

VW (Bosch) TDI injection pump fuel shut off solenoid functions

My B4 Passat 1996, suddenly, would idle but not respond to the accelerator pedal. It would not go over 5mph before it would quit. Answer: Bad N109 relay that was partially working and supplying a ...
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2 votes

VW (Bosch) TDI injection pump fuel shut off solenoid functions

Since no one has chimed in, I will at least give it an answer. I don't think that it would. The control unit for the diesel injection can limit fuel through the unit injector solenoids directly. The ...
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  • 1,086
2 votes

Turbo Failure Modes (VW TDI VNT15)

First I would establish actuator movement. The failure of the actuator to move properly is the leading cause of VW turbo failures. With a vacuum pump, such as a Mighty-Vac, or the Harbor Freight ...
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  • 2,095
1 vote
Accepted

Number of diesel injections per revolution

To sort out the confusion here is my analysis: (rpm/2) * (num of cylinders) / 60 The rpm is divided by 2 as it is a 4-stroke engine, divide by 60 for power strokes per second. This gives: (1200/2) ...
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  • 34.4k
1 vote

Can I use 15w40 synthetic engine oil in my 2015 vw tdi and how long can you go between oil changes?

Please read the owner's manual for information on the correct oil to use. 15w40 is much thicker than 5w30 or 0w30, and is not typically used on modern cars. Also take note of the grade i.e A5/B5. ...
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  • 223
1 vote

Can I use 15w40 synthetic engine oil in my 2015 vw tdi and how long can you go between oil changes?

15w40 oil is way too thick for this car. Just stick to the oil that is mentioned in the owners manual, which will probably be 5w30 or 0w30.
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  • 1,350
1 vote

VW 1.9 TDI after total engine and turbo repair burns oil

You don't really give us much detail of what was done to your engine when it was rebuilt. I have rebuilt quite a few VW diesel engines, and not experienced what you describe. High oil consumption ...
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  • 2,095
1 vote

VW 1.9 TDI after total engine and turbo repair burns oil

If your engine is burning 250ml of oil in merely 600km, It'd be EXTREMELY worried, and think that'd be an oil leak rather than literally burning oil. And, yes. In a diesel particularly, you need to be ...
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  • 644
1 vote

Unknown actuator on golf mk3 tdi 110hp

This is more than likely a vacuum switch which tells the computer something when it reaches a certain amount of vacuum (could also be a pressure switch doing the same thing when the turbo reaches a ...
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1 vote

What is the cost of general maintenance on VW Jetta TDI (diesel)

For what it might be worth, we have a pair of Jetta Mk4 TDIs one with the ALH engine, the other with a BEW. Both are well over 200,000 miles (the ALH is pushing 300,000) and for the most part we do ...
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  • 14.3k
1 vote

How often do I need to change my oil in a VW TDI?

If your TDI is a PD type then you're better off erring on the short/fast side. There were many cases of prematurely worn out cams on PDs due to oil. This means sticking to the oil norm and change ...
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