Start car and run engine to avoid freezing problems - good idea?

In what countries and why ?

For example Austria - because of the noise and for environmental reasons. (Apart from being pointless).
Hence many people buy a parking heater to heat up the engine and the car before they drive in the winter.
For example here: [broken link removed]
 
In many countries which have a "proper" winter you can specify a fuel-burning pre-heater which warms the engine coolant and provides demisting etc. from the off.

Some BMW diesels have a Webasto one fitted, for example, but in the UK and Ireland it only works when the main engine is on. For those of you with a BMW you can get a mod. from dealers which allows you to start it remotely to provide pre-heating prior to starting the engine.

SSE
 
I'm confused now - there's no such thing as summer and winter batteries or cars and in most countries in Europe people use their cars in winter without any bigger problems. Any chance you'd get your car to service to have it checked? My car started after 3 days of standing outside in the snow without any problems.

I assume it might depend where its parked. Front of my house seems especially exposed to the wind. If you parked at the side of a house or sheltered by trees it might all the difference. Also some cars have bigger batteries than others.

I waited till after lunch and the battery actually had come back to life a bit, it was probably frozen solid when I tried it earlier. The web suggested that low batteries freeze at around -6c. Colder than that last night. Got a really long set of jump leads so I didn't have to move the car and it started first time.

Apparently after reading up on it, there are actually different batteries you can get. Perhaps they are standard fit in colder countries I dunno. Theres a rating Cold Cranking Amps (CCA). And you can get heavier duty batteries.

What does CCA mean?
Cold Cranking Amps is a rating used in the battery industry to define a battery's ability to start an engine in cold temperatures. The rating is the number of amps a new, fully charged battery can deliver at 0° Farenheit for 30 seconds, while maintaining a voltage of at least 7.2 volts, for a 12 volt battery. The higher the CCA rating, the greater the starting power of the battery.

So you can get heavier duty batteries and even some with extra insulation etc. Again I dunno if these are standard fit in other countries. Insulation blankets and other devices are more common elsewhere. Also found the following.

The automotive battery is a very interesting device on an automobile. There is no other part that is more neglected, and then expected to perform at peak capability. On top of this, the automotive battery responds to certain outside elements depending on the climate in which it is installed.


For example, living in the Northwest, we are subjected to a moist and mild climate. This affects battery life in many different ways. For instance, moisture contributes to corrosion on the posts of a battery. This can drastically affect the starting capability of the battery, due to the electrical current having resistance to overcome before reaching its destination, which is usually the starter motor. This mild climate we live in also produces cooler weather. Cooler weather can cause starting problems due to a battery’s inability to respond by warming itself up. At 32 degrees Fahrenheit, a battery loses up to 50% of its starting ability. Insulation blankets are available, but most of the buying public does not invest in such preventative maintenance items.


When the season changes in the Northwest, warmer weather appears. Although more of an ideal climate, when heat is excessive, it produces resistance. This is a battery’s number one enemy! Too much resistance and a battery simply will not be able to release its charge to the starting components of an automobile. The same insulation blankets that keep a battery warm in cool weather also reduce heat when the weather is warmer. Please invest in one to maximize the life of your battery!


There are areas in the United States that have what are known as extreme climates. These areas typically require that car batteries be made especially for them. For instance, in Alaska, where temperatures can reach to 60 below zero, a battery needs extra insulation. In this region, batteries have an extra layer of material inside the cover to maintain some semblance of protection against extreme cold. Battery warmers are also available in these climates. If not used, a battery simply cannot be relied upon to start any vehicle. The chemical reaction inside a battery that is necessary to provide power to accessories must be stimulated by some sort of temperature in order to happen.


Arizona is at the other end of the battery – damaging spectrum. Here, temperatures approach more than 130 degrees! Resistance is the main enemy of a battery in this climate. Manufacturers of batteries will typically add more lead to the plates to be able to resist melting. This melting shorts the plates out, which causes the battery – killing resistance I spoke of earlier. Brass terminals are also standard equipment in this region, as lead can sometimes melt when combined with the normal heat in an engine compartment. Go to your nearest auto - parts store for more information.
In summary, climate plays a large part in battery life and maintenance. Consumers must be aware of the inherent “battery killers” in their climates. They must also respond with the proper maintenance techniques and items to counter these “killers”. What will result are more satisfied consumers, and less perfectly good batteries being recycled.

I remember years ago people putting blankers and similar over engines at night, especially on equipment (not cars) that was hard to start.
 
In many countries which have a "proper" winter you can specify a fuel-burning pre-heater which warms the engine coolant and provides demisting etc. from the off.

Some BMW diesels have a Webasto one fitted, for example, but in the UK and Ireland it only works when the main engine is on. For those of you with a BMW you can get a mod. from dealers which allows you to start it remotely to provide pre-heating prior to starting the engine.

SSE

Theres something about a pre heater in my VW manual. Only available in certain markets. I had forgotton about it, till you mentioned that.
 
Theres something about a pre heater in my VW manual. Only available in certain markets. I had forgotton about it, till you mentioned that.

Friends of ours (who live in the Jura mountains) have a preheater on their VW Sharan 2.0 TDI, had one on their previous Sharan 1.9 TDI. It's actually fitted on all BMW 3.0d engines, I believe, but you can't start it separately unless you get the fix from a dealer. They used to look at us funny when we said we had to run the car for a while on cold mornings to clear the screen, they just blip the preheat on, finish their cornflakes and coffee and drive off. Mind you, they have to have winter tyres on from Nov-April too!

SSE
 
Some of the MG ZTs had this as an option. Also the Rover 75s. Possibly on the cdti Bmw engine derived models?
 
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