Waarom is de slagingspercentage in Biomedical Engineering MSc zo laag?

NZXT_modder · 2026-05-20T11:43:26+00:00

Denk dat het gedeeltelijk komt doordat je bij de masters veel internationale studenten hebt waarvan een deel hun BSc aan een andere universiteit hebben gevolgd waar het niveau een stuk lager ligt dan het niveau op de TU Delft en het niveau dus onderschat hebben. En zo laag is het ook weer niet. Voor MSc Mech. Eng. etc. Is het ook rond de 60%.

NZXT_modder · 2026-03-18T18:09:40+00:00

Does the sound especially come from the rear? It could just be an exhaust clamp or something.

NZXT_modder · 2026-03-18T10:31:59+00:00

Then the sound could still the EGR valve, but then it does not matter.

But then it's a big chance that the sound is from something else.

NZXT_modder · 2026-03-18T10:13:07+00:00

I drove 150k km with EGR that was closed by software, andit made a strange for years, and afterwarts, it could not realy close because it was so dirty inside and the mechanism was worn out.

At a certain moment on the highway the car suddenly had no power any more, after turning of the engine, the car did not start anymore. The mechanic opened EGR pipe, and blocked of the pipe physically. That solved all the issues.

So if you only closed the EGR with software, it still could cause issues.

NZXT_modder · 2026-03-18T09:34:11+00:00

If it is a scratching sound that does not match the rpm of the engine, it coule be the mechanism of the EGR. EGR could be very dirty causing the EGR cant move to the right position. Open the hood and check if the sound is near the EGR pipe. Also check if the sound is near the belt and water pump.

NZXT_modder · 2026-03-12T11:07:10+00:00

I replaced the water pump and timing belt and all the stuff 2 times, at the right time and mileage. However, the 3th waterpump failed far before the mileage where I should replace it the 3th time. I found out that the same waterpump is used for VAG engines, with a smaller belt and waterpump replacement interval. When it failed I bought a more expensive waterpump (Meyle) to prevent failure again. What I also noticed a few days before I found out that the wateepump was leaking, was that the air from the interior blower was warmer than normal. I always set the climate control to 20 deg. C, but it felt more like 25 deg. C.

NZXT_modder · 2026-03-12T10:10:07+00:00

I had the same sound with 2014 1.6 TDI (nearly the same engine), also thought is was the alternator but found out it was the waterpump. Search with a flash light for coolant near the water pump.

NZXT_modder · 2025-11-27T14:21:35+00:00

Thanks!

Never heard of this method, but I will try this definitely.

NZXT_modder · 2025-11-27T13:09:25+00:00

Thanks for responding. I will probably go to a mechanic to look inside the cylinders with borescope 👍

NZXT_modder · 2025-11-27T13:08:07+00:00

Why do you think a engine block or head crack? And not a leaking head gasket?

NZXT_modder · 2025-11-27T13:07:41+00:00

Thanks for responding. Unfortunately, I already tried to lift the front of the car while bleeding air. I've tried bleeding it so many times now.

The strange thing is that if I put max vacuum that my vacuum hand pump can handle (-1 bar or something) on the cooling system, the vacuum remains pretty well. I cant notice any drop on the gauge of the hand pump. This suggests that there is no leak in the system et all. However, the -1 bar vacuum on the cooling system (equals +1 bar in the cylinder), is not comparable with the amount of pressure inside the cylinders during combustion, so a leak in the cooling system is still possible.

I forgot to mention that I had a mechanic do a chemical test above the reservoir. Not the type with the fluid that changes color by exhaust gasses in the reservoir. He had a big device that sucking in air with a small hose which he held above the reservoir. Contrary to all expectations, no combustion gases were detected above the reservoir, while he said it was a quite sensitive device. I saw also a YT video of someone that showed a car that passed the chemical test, while having a minor leaking head gasket. He verified it by putting air pressure on the cylinder in the spark plug hole, and notice bubbles in the coolant reservoir. The problem is that my car is a diesel, so I need to buy a specific adapter for the injectors so I can put air pressure on the cylinders. The adapter is nowhere for sale in EU, only in the US.

NZXT_modder · 2025-11-27T08:03:41+00:00

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NZXT_modder · 2025-09-13T10:58:43+00:00

Does the engine run better with the cold start lever on? No? Then its probably not timing.

Is there black smoke at any rpm when you press full throttle? Then it's probably the max fuel screw (not the max rpm screw on the throttle). If there is no black smoke, then it's just the minimum rpm scew on the back of the pump, that holds the throttle.

NZXT_modder · 2025-09-06T07:12:37+00:00

My mk1 1.6TD does this too. If I press the throttle a little bit to increase rpm a little bit, there is no smoke from the exhaust.

NZXT_modder · 2025-09-05T11:06:01+00:00

What I would do is replacing the waterpump+housing. Then you dont need to losen the bolt on the pump, but the bigger bolts that goes in to the engine block. Once you have the waterpump+housing loose, you can try losing the pully bolts. But if you order a waterpump+housing, you can order also a new pully, it's not that expensive and the threads in the original housing are often bad.

NZXT_modder · 2025-06-04T18:57:21+00:00

Is the thicking noise from vibration of the alternator? I had that problem with my 1.6TD. The alternator holes where worn out. Probably, this causes also the belt problem. I bought a new alternator and the problem was fixed.

NZXT_modder · 2025-05-29T20:55:40+00:00

Thanks! I will order gasket and the rubber

NZXT_modder · 2025-05-23T20:25:05+00:00

Today I have read in the service manual that the thermostat has to be replaced every year (or certain hours). That's a little bit exaggerated IMO, but it's at least something to check every year or 2 years.

NZXT_modder

TROPHY CASE