Bart
  • Member for 5 years, 3 months
  • Last seen more than a month ago
Why are spare wheels smaller than normal wheels?
17 votes

Because you rarely use it, reducing its size and weight is an effective method for cutting down costs. It also saves space and makes packaging easier for the engineers. The cost aspect is also the ...

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How to interpret torque spec ranges?
Accepted answer
11 votes

Those are the limits. Going above specified torque can damage the thread in the nut or engine block, or on the bolt. Especially aluminum and light metals are prone to failure due to bolts and nuts ...

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What is crankshaft grinding and why is it done?
10 votes

A crankshaft wears with use. After a lot of miles, the play between shaft and bearing becomes too much. The more play, the lower the oil pressure, the worse the lubrication. And then it wears out even ...

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Difficulty of shifting down to 1st while moving (manual)
6 votes

There's much older cars that don't have their 1st gear synchronised. My '76 Triumph TR7 doesn't have it, and I bet your Skoda doesn't have it either. You either have to come to a complete standstill ...

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Is failing to change brake fluid a life safety issue?
5 votes

YES. A big Y-E-S. It's a huge safety issue. See, braking fluid absorbs(even attracts) water over time, not so much over usage, if at all. Brake fluid gets really hot, even more under sustained braking ...

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Is it possible to replace the diodes in a rectifier?
5 votes

Possible, sure. But you need some beefy diodes that can handle an amperage of at least 50A, and at the right spec.(think about type, voltage drop, switching time, reverse blocking specs, temperature......

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Does increased load of electronic devices from your car reduce fuel economy?
5 votes

Quite some people wrongly think that car alternators are just like these old dynamo's that drag on the tyre of your (old)bicycle: The drag that thing has does not vary if you'd switch on- or off the ...

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When loading a car trailer how should the load be set?
4 votes

You have to place things so, that the centre of gravity as low as possible, and in the middle of the trailer.(above the axles, but somewhat closer to the car) Try to place things close to each other. ...

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How is Intake Manifold flow measured?
4 votes

With modern engines, it is measured with a MAF meter, a device that meaures air flow by using a hot platina wire or film that cools down when air flows past it. The temperature is an indication of the ...

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How can a car be tuned for low/mid/high end torque?
4 votes

The only thing you can tune while keeping an engine mechanically 'identical' as you word it, is playing with ignition timing and AFR. If you have variable valve timing and you know what you're doing, ...

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Why does new clutch have much lower biting point?
3 votes

A new clutch is obviously still thicker than a used one, so it'll (dis)engage later in some cases/designs. (when the pedal's almost pressed fully) A different aftermarket clutch press will also make a ...

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How bad is driving on a flat tire for 40 km?
Accepted answer
3 votes

If the tyre was really low or literally flat, driving for 40km with it at higher speeds will probably have made it disintegrate on the inside. I had someone come in the workshop a few days ago with a ...

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How would a car handle differently if it had independent brake controls, like a pedal bike?
3 votes

It would surely handle differently, and that's why this is also done, but automatically. There's a brake pressure distributor in your car that distributes pressure depending on different factors, eg. ...

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What's a reasonable time for doing a one person brake bleed?
3 votes

It can definitely be done faster, but that's a matter of experience. A vacuum cannister doesn't help me much, i always use this constuction and it has worked perfectly for me: It's the most ...

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How would you stop if the ignition switch failed while driving?
3 votes

The brake booster will support a few pumps so use 'em sparingly if in such a situation. After that it'll get harder depending on the weight of your car. An MPV will barely slow down without booster, ...

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How often does my engine check fuel octane?
Accepted answer
3 votes

The ECU(or at least the better ones) can indeed actively 'search' for the point of pinging as you said. The pinging sensor listens to the combustion, based on that the ECU determines how close it is ...

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What are the common causes of inconsistent/dead flashers?
Accepted answer
3 votes

If they work inconsistently, it may indicate bad electrical contact. In older cars the technique used for the on/of nature of flashers, is based on heat caused by current. If there's not enough ...

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RPM shoots up at full throttle Slipping Clutch?
Accepted answer
3 votes

When you get your foot off the clutch, there is(or rather said there should be) a fixed connection between your engine and your wheels. If you see a rise in rpm without the car accelerating, there is ...

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1996 Volvo 960 won't spark or inject
Accepted answer
2 votes

I have solved the issue, and it shows how important it is to check for differences when swapping parts like the engine. That's why i'm making this an answer. I did verify that the ECU, ignition ...

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Battery won't fully charge
2 votes

I'd also suspect something draining on the battery, but alternatively the batter could be discharging internally. I don't expect the latter though. It's rather easy to find a drain if you're a bit ...

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Two completely different opinions- what to do? frozen front left caliper or nothing?
2 votes

If the caliper really was frozen/blocked/sticking, that could've made your brake keep being applied while you where driving. You should've noticed that in weak acceleration and sharp deceleration. The ...

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In an electric vehicle, do you need to come to a complete stop before switching to low gear?
2 votes

All automatics(about 1998 and newer) I have driven just won't shift to the gear you desire, if that would result in the engine revving either too high or too low. So for instance shifting to 2nd while ...

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Full throttle and braking
Accepted answer
2 votes

Firstly, I would strongly disrecommend against building a cruise control unit for your car, without having experience and completely knowing what you're doing; overriding the throttle with a self-made ...

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Tecumseh Yard Machine (156cc) does not start and there's no combustion: Does this sound like an ignition coil issue?
2 votes

Your assumptions could very well be wrong. They could be, but aren't necessarily the causes of your problems. As already mentioned, but i second it because it's important: Put new gas in there, ...

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Lifting primer and paint around sanded areas
2 votes

Dealerships are known to spray rubbers and plastic with some kind of silicon spray to make them appear new and clean. Silicon spray, even when it's been sprayed on something a year ago, makes that you ...

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Weak spark on one cylinder
2 votes

It seems you have found the bad cyilinder already. Try swapping its spark plug with one from another cylinder to see if the problem is now caused by that cylinder. You then know for sure if the spark ...

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Sound of air leak during kickstart and during engine running?
Accepted answer
2 votes

If it really is only audible when the engine is at its compression stroke or the subsequent power stroke, in theory these are the only possible options: -worn piston rings -leaking head gasket -...

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Could oily sludge in cooling system affect engine temprature?
Accepted answer
2 votes

Deposits(grease, rust or whatever) in your cooling system can restrict the waterflow, but that's not necessarily the (only) cause. These deposits also restrict the heat transfer from the iron block to ...

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Does leaving a manual car in gear when parked damage the car in any way?
2 votes

No, it puts some stress on the transmission/driveline, but not much. It's negligible compared to the stress it gets when you drive the car, even when parked on a steep hill. You must have driven up ...

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How much can sub-optimal octane affect efficiency or power?
2 votes

It's obviously not like: 10% lower octane is 10% less timing advance, 10% less power, and 10% more fuel consumption. I don't think it's even possible to calculate beforehand how much you will benefit ...

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