58 votes

How do cars drive through deep water as shown on many videos online?

One of your questions as stated and not answered is: What is the recommended thing to do if you need to pass through an area that's been flooded? The answer to this has nothing to do with ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
44 votes

Spark plug broke off in engine - can I drive the car?

That sounds very risky to me. The portions of the plugs that reside in the combustion chamber are designed to tolerate the heat and pressure there. I don't think they will melt. So what will happen ...
dlu's user avatar
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39 votes
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How do cars drive through deep water as shown on many videos online?

The term you're looking for is Wading Depth which is specified by the manufacturer. They may surprise you, and its info you should know about your vehicle. Its in your manual, or search it online. ...
Criggie's user avatar
  • 2,908
33 votes

Spark plug broke off in engine - can I drive the car?

Do NOT drive a car with a piece of sparkplug inside the engine. It can (and likely will) lead to serious damage (up to a catastrophic engine failure). Get your car towed to a service and have the ...
Jakub's user avatar
  • 581
26 votes

How do cars drive through deep water as shown on many videos online?

Generally the car shouldn't be driven through water! On your Yaris, where you had high revs, what would happen if your air intake was submerged would be that your engine would fill some cylinder(s) ...
Markus's user avatar
  • 1,136
24 votes

Spark plug broke off in engine - can I drive the car?

That's a nice car - don't be a consumer and break it because you're too lazy to fix it properly. Sadly the "proper" fix is to tow it to your mechanic, who will take the head off and fish out the ...
Criggie's user avatar
  • 2,908
24 votes
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Why one should not leave fingerprints on bulbs and plugs?

Why is this a thing? For bulbs it is - spark plugs don't care. The problem with getting fingerprints on bulbs (specifically halogen-type bulbs) is actually the grease that gets left behind - the bulb ...
motosubatsu's user avatar
20 votes
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Impact wrench on spark plugs?

In a word: NO! Please do not use an impact wrench on these. You run the distinct chance of stripping out all of the threads in the head, which will cause a huge nightmare for you having to have ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
18 votes

Spark plug broke off in engine - can I drive the car?

If this happened during a plug change If you have roadside assistance/towing, I would highly recommend getting it towed home, then purchase a cheap USB inspection camera or a inspection unit like this ...
mikegreen's user avatar
  • 291
12 votes

Where do spark plugs get their electricity?

From a device called a coil. The coil is basically a transformer which takes in the 12vdc voltage from the battery and upconverts it to around 40k vdc (depending on the ignition system). Here is a ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
12 votes
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Help with spark plug stuck upside down in well

I have a telescopic magnet which is invaluable for this very scenario. It even has a light built into the end of the magnet. I bought it because I saw it in the tool shop and it's gotten me out of a ...
Steve Matthews's user avatar
12 votes

How do cars drive through deep water as shown on many videos online?

There are a lot of variables here, but key risks are: water shorting electrical systems water being sucked into air intake (or potentially into exhaust) cold water coming into contact with hot metal ...
Rory Alsop's user avatar
  • 18.6k
11 votes

Do I really have to pull the engine to remove broken spark plugs?

Sounds to me like the plug is still in the head as normal, just with the porcelain and electrode snapped on the top end (where the ignition line attaches). If that's the case, it should be really easy ...
kyle_engineer's user avatar
10 votes
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What Could Cause Flash Over / Arcing to Reappear on New Plugs?

I think your problem is your plug wires. I think they are leaking along the boot and down to ground (earth). With this loss of energy, you'll also see the large carbon buildup on the business end, due ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
10 votes
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Can I use a 15lbs torque wrench for 13lbs spark plug job

While it most likely will be OK, it is not worth the risk. If you do over torque the spark plugs and strip the threads you will regret it because it will be a big job to get it fixed. Most mechanics ...
HandyHowie's user avatar
  • 25.2k
10 votes

Can I use a 15lbs torque wrench for 13lbs spark plug job

The lower and upper ranges of the torque wrenches are generally unreliable. With a bit of bad luck the deviation of the torque wrench is too large for the threads. I'd consider getting a smaller ...
Martin's user avatar
  • 8,448
10 votes

Do I change all four coils when I change one spark plug that is faulty

You shouldn't need to change the spark plug coils unless they are faulty, so the answer to your question is no, you don't need to replace the coils again. There probably wasn't a need to replace all ...
HandyHowie's user avatar
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9 votes
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What is spark plug heat range

The spark plug heat range refers to how well the center electrode conducts heat to the head. A hot plug can't conduct the heat very well that is what makes them hot, they can't cool themselves. A ...
vini_i's user avatar
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9 votes
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Why are the spark plugs from the same 2 cylinders corroding faster than the others?

What you see could very well be burned coolant as well as oil. As the glycerin burns in the combustion process it can take on corrosive properties that degrade the electrodes. Typically with oil in ...
DucatiKiller's user avatar
  • 32.9k
9 votes

Spark plug broke off in engine - can I drive the car?

No question - running the engine will break it. If you're "unlucky", there's enough clearance between the piston and the valves to fit the spark plug. In that case you'll have the spark plug ...
Graham's user avatar
  • 1,499
9 votes

Spark plug working fine in free air, but hard miss in engine

The current follows the least resistance. On a spark plug the current jumps between the gap in the electrodes. When the plug is out of the cylinder the easiest path is between the electrodes. But when ...
Jupiter's user avatar
  • 3,187
8 votes
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Firing a Coil on Plug

You would follow these simple steps. Remove plug from engine Place plug into coil wire Make sure threads of the sparkplug are grounded to a metal surface. Validate metal surface goes to ground by ...
DucatiKiller's user avatar
  • 32.9k
8 votes
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Can a altered curve of spark plug finger break the engine?

I am yet to see an engine this tight that the piston can hit the spark plug ground electrode even if it is bent straight. Even if they somehow meet, the damage will be minor and not worth the worries -...
fraxinus's user avatar
  • 2,062
7 votes
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Do I Need to Ground the Spark Plug When Testing

Yes you should ground the spark plug. In your case the spark plug was close enough to the block to still jump the gap. If the plug was far enough away from metal nothing would have happened. On a ...
vini_i's user avatar
  • 16k
7 votes
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How to check if spark plugs are firing? Coil-on plugs

You should have 2 coil packs on the back side of the engine near the throttle body. Wires run to individual cylinders. I don't know how easy it would be to find locally but you can use an inductance ...
Ben's user avatar
  • 10.7k
7 votes

What causes pink spark plugs?

I assume you already checked the heat range. The pink color has a similarity to the "ferrocen" symptom. Ferrocen is an iron-containing anti-knock fuel additive. It causes red, electrical conductive, ...
Martin's user avatar
  • 8,448
7 votes

Why one should not leave fingerprints on bulbs and plugs?

Fingerprints on spark plugs aren't a thing, the natural oils on your skin won't affect their operation. If, however, your fingers are covered in car grease or dirt when you handle the plugs then that ...
GdD's user avatar
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7 votes
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Sparkplug impossible to manually remove

It probably is that the installer of the spark plug did over tightened it, but it doesn't mean they used an impact gun. There may be other things going on here which has seized the plug in the hole or ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
7 votes

Can a altered curve of spark plug finger break the engine?

Perhaps. After bending the spark plug electrode you really should replace the plug. These things are not designed to be bent more than a tiny amount to adjust the spark gap. By bending it enough to ...
jwh20's user avatar
  • 12.1k
7 votes

Can a altered curve of spark plug finger break the engine?

Buy a new plug. Cleaning does not fix the problem of spark "leakage" up in the annular space. I used a test instrument that permitted looking into the plug annular space using a mirror in ...
blacksmith37's user avatar
  • 3,678

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