Piston Slap: Fear No Polar Vortex!

Joel writes:

My family is a Volvo family. Volvos are from Sweden and they take winter very seriously. There are a number of ‘winter’ climate options that were, at least at one time, available on Volvo’s cars. For instance:

  • Parking Heater
    Sometimes known as a ‘Fuel Driven Heater’ or after one of the popular brands Webasto, Espar, Eberspacher.
    This is essentially a tiny gasoline or diesel (from the car’s fuel tank) furnace, mounted under the hood, that is plumbed into the car’s cooling system and hooked up to the climate controls. You start the heater remotely, and it heats the coolant and pumps it through the system, heating the engine and supplying heat to the cabin heat exchanger. Some can even use the car’s climate systems to turn on the blower fan and fully heat the cabin.
  • Pause Heater
    Sometimes known as a ‘Residual Heater’ or “Rest Heater’ on BMWs. This is an electric coolant pump, plumbed in with the cabin heat exchanger. When you turn the car off there is a lot of heat stored in the coolant, but only a tiny amount of it is left in the cabin heat exchanger. You press the ‘Rest’ button and the electric pump moves the coolant around so you can run the cabin heater for about 10 minutes after the engine is turned off.
  • Electric Cabin Heater
    This is an electric space heater that you place inside the cabin. Of course it’s got over-temp and tip-over systems so it won’t catch anything on fire.

Are any of these options available on ANY car sold in North America now?

Sajeev answers:

Questions like these remind me why I am so fond of the comments from the Best and Brightest in this series. Because my knowledge of this topic is weaker than most, and PR folks aren’t lining up fancy new press cars in my driveway. But I got a plan, son. I got me some Google and we got the Best and Brightest, baby!

So anyway:

  1. Parking Heater: Well, Volvo’s still got it! But it’s a dealer installed accessory, if that matters.
  2. Webasto still makes one, fitting many a VAG product in Europe. I’d be shocked if manufacturers in North America follow suit, even if the concept’s proven itself in American RVs and 18-wheelers. No matter, Webasto’s own video implies it’s somewhat universal:
  3. Pause Heater: The BMW Rest system is/was a neat hallmark of the brand, but there’s conflicting info on the ‘net about whether it still exists in this age of i-Drive, start-stop equipped BMWs. Perhaps a trip to your local dealership to question the i-Drive skills of a sales expert is in order!
  4. Electric Cabin Heater: These are standard fare in every Nissan Leaf and Tesla Model S, as they have no internal combustion to feed you hot air! Cuz hot air is the job of their greenwashing-marketing departments! I kid, I kid!
  5. Even the darling of the Hybrid world, the Toyota Prius has an electric heater. It’s entirely possible that super-uber luxury cars use this electric helper and a conventional heater core from the cooling system. But, but, BUT…many cars sport seat heaters, steering wheel heaters and (drum roll please) the new S-class has armrest heaters!

Considering the electrical load of trying to heat an entire cabin, don’t be surprised if heating your ass, your back, your hands and your elbows does the same thing but far more efficiently. Get into those warm items and soon enough the conventional heater will have your back. And everything else. Literally.

Send your queries to sajeev@thetruthaboutcars.com. Spare no details and ask for a speedy resolution if you’re in a hurry…but be realistic, and use your make/model specific forums instead of TTAC for more timely advice.


Comments
Join the conversation
2 of 22 comments
  • Mieden Mieden on Apr 03, 2014

    I know for a fact Mercedes made "REST" available in 1989 with the R129 SL and everything after. BMW had a similar system available on early E32/34 cars through the "timer" function of their "On-board Computer" system, but it was much less efficient and they removed the function from those cars during their mid-cycle update.

  • Toshi Toshi on Apr 04, 2014

    Electric resistive heaters are old hat. What's hot are the heat pumps found on the Tesla Model S, the 2013+ Nissan LEAF SV and SL, and the Toyota Prius PHEV prototype (but sadly not the production model). Being able to move 3-4x as much heat from ambient air outside into the interior as is put into the system is so much better than the 1.0 coefficient of performance of resistive heaters, by definition.

  • ToolGuy @Matt, let me throw this at you:Let's say I drive a typical ICE vehicle 15,000 miles/year at a typical 18 mpg (observed). Let's say fuel is $4.50/gallon and electricity cost for my EV will be one-third of my gasoline cost - so replacing the ICE with an EV would save me $2,500 per year. Let's say I keep my vehicles 8 years. That's $20,000 in fuel savings over the life of the vehicle.If the vehicles have equal capabilities and are otherwise comparable, a rational typical consumer should be willing to pay up to a $20,000 premium for the EV over the ICE. (More if they drive more.)TL;DR: Why do they cost more? Because they are worth it (potentially).
  • Inside Looking Out Why EBFlex dominates this EV discussion? Just because he is a Ford expert?
  • Marky S. Very nice article and photos. I am a HUGE Edsel fan. I have always been fascinated with the "Charlie Brown of Cars." Allow me to make a minor correction to add here: the Pacer line was the second-from-bottom rung Edsel, not the entry-level trim. That would be the Edsel Ranger for 1958. It had the widest array of body styles. The Ranger 2-door sedan (with a "B-pillar", not a pillarless hardtop), was priced at $2,484. So, the Ranger and Pacer both used the smaller Ford body. The next two upscale Edsel's were based on the Mercury body, are were: Corsair, and, top-line Citation. Although the 1959 style is my fav. I would love a '58 Edsel Pacer 4-door hardtop sedan!
  • Lou_BC Stupid to kill the 6ft box in the crewcab. That's the most common Canyon/Colorado trim I see. That kills the utility of a small truck. The extended cab was a poor seller so that makes sense. GM should have kept the diesel. It's a decent engine that mates well with the 6 speed. Fuel economy is impressive.
  • Lou_BC High end EV's are selling well. Car companies are taking advantage of that fact. I see quite a few $100k pickups in my travels so why is that ok but $100k EV's are bad? The cynical side of me sees car companies tack on 8k premiums to EV's around the time we see governments up EV credits. Coincidence? No fooking way.
Next