Alternator in North Dakota

Winter is a sustained electrical load

Short North Dakota winter journeys ask the charging system for everything at once: headlights against a dark afternoon, the blower at full, a heated rear screen, heated seats, and a battery that has just given up a large amount of current to a cold start.

An alternator that is merely tired copes in July and cannot keep up in January. The symptom is a battery that goes flat repeatedly and tests fine each time it is charged — the battery is not the fault, it is the thing reporting one.

The coldest starts in the lower 48, which is why a block heater is standard equipment rather than an accessory.

An alternator breathes whatever the road throws up

The case is ventilated, because the machine has to shed its own heat. On unpaved roads that means it is drawing dust through itself continuously, and the dust ends up on the slip rings and in the bearings.

A whine that rises with engine speed rather than road speed is a bearing. It is worth catching, because a seized alternator bearing does not stop at the alternator — it takes the belt, and everything the belt drives goes with it.

Oilfield truck traffic breaks up surfaces that were built for less.

The climate, in a number

Snowfall averages 30 to 55 inches a year here, less than the northern states either side of it. Every one of those days is a day the cooling fan, the air conditioning clutch and the blower are all drawing at once, and the alternator is what carries them.

What goes on the roads in winter

The transport department spreads either pure salt or a salt and sand mix, and also runs liquid ice-melting material made up with a sugar-beet product. What is spread on the road reaches the alternator through the same wheel-arch opening that cools it, and a case packed with salted grit runs hotter than one that is clean.

Why this one here

A charging system that cannot keep up with a winter electrical load leaves a chronically undercharged battery, which then fails on the coldest morning.

Forty below is a different category

Most of the country calls cold weather a nuisance. Here it is a specification.

At forty below, several things happen at once and each of them wears something.

What else North Dakota does to a car

Salt for as long as the cold lasts.

What we hold, and what it costs

5 options from Bosch, Cardone, Denso, Remy and Valeo, from $239.99 to $309.99. Prices are firm — where we have no price we publish none.

We are a reseller rather than a manufacturer: we source the part, check it over and sell it, and we confirm it against your year, make, model and engine before it ships rather than asserting a fit on the page. We ship anywhere in North Dakota, including Fargo, Bismarck, Grand Forks and Minot.