Monday, November 12, 2012

How to Perform Basic Maintenance on Your Car

I know some folks who don't do it super often.  And you should.  (I don't...but you should.)  Here's what I think I know about things, but I'm really not qualified to say any of this.  Hopefully it's at the most entertaining and at the least, not going to ruin your life if you listen to it.  But don't listen to it.  Please.

Checking fluids.  This is probably the single scariest item on the checklist, and I'm starting with it so those of you who aren't serious will drop out.  Just kidding.

All you have to do is open your hood.  If you don't know how to do that, you're probably gonna need to feel around under the dash on the left while you're in the driver's seat.  Find a lever you don't recognize.  Pull it.  If it's not a storage compartment (my dad has one where the hood latch should be—what?!), you should hear a muffled JINK up toward the front of the car.  Get out of the car.  Go to the front of your car and feel around just under the hood, which should be slightly lifted.  There'll be something there you have to push up or pull down to open the hood the whole way up.  You're on your own here because it tends to vary widely among vehicles.  Once you have succeeded, push the hood up and find the little stick to prop it up with.  That's a good start.

Now that you're empowered by that victory, go and get your owner's manual.  If you don't have it, you should order it off the Internet and try all this again later.  Inside the manual, if the manufacturer likes you, there should be a diagram of your car under the hood.  You should check where the brake fluid is, the radiator is, the oil dipstick, the automatic transmission fluid, and the battery is.  Maybe bring that manual out in front of your car and point at the things as you find them.  It's nice seeing diagrams match with reality.

Just look at all those places.  Check all the fluid levels—there will be a “min” and a “max” line on all of them—and freak out if any of them are below “min.”  If they're above “max,” in my experience, things tend to be just fine.  Also, keep note of whether any fluids are dripping out of your car into parking spaces.  I guess that's kind of more of a homework assignment than a “right now” sort of thing.

When you close your hood, don't gently push it down into place.  That won't work.  Lift it up about six inches above its final resting place and let go.  The loud clang is very satisfying, and the hood actually closes.

Check your tires.  People don't see their tires while driving, and in most cars, there aren't any blinking lights to tell you to freak out about them.  So people usually don't worry.  But the thing is, if you don't monitor them (things like treadwear, pressure, and general condition), they could just randomly explode and kill you, or at least scare you to death.  Please worry at least a little.

Pressure: Inside your door jamb on the driver's side (or somewhere hidden deep within the bowels of your owner's manual), you can find information on what your tire pressures should be.  I usually inflate (HAR HAR) these by about two PSI because I like a firmer ride.  And generally you're gonna want a little bit of a higher pressure in the front and a little less in the back.  My dad told me it was because inflating the front more is good for steering and inflating the back less is good for having a gentler ride, but other folks just say the engine's heavier so you use more air.  Whatever.  You can find some gas stations with air stations outside, but of course it's always easier if you have a friend with a compressor.  (The QT near the Clifton/Briarcliff intersection has free air outside, FYI.)  The actual mechanics of checking the pressure with the gauge and putting air in are things I can't easily explain. You want not to hear air hissing out in either case, and you want a perpendicular connection to the stem.

In other news, if you have a new fancy car with a tire air pressure monitor and it goes off, you don't need to panic.  A very sweet fellow student in college came up to me in a parking lot and asked if I knew anything about cars.  I said, “Um, kind of, what's up?” and she explained that her car's pressure monitor was on and she didn't know if she should worry.  So we walked back to her car, looked at the tires, and I said “ehhhhhh, they all look okay. I wouldn't worry too much, just fill it up when you can.”  Your tires are going to wear more if they have too little air in them since the wall is going to be flexing more while you're driving, but it doesn't mean you have a flat or that your tire will explode.  So it's okay...for now.

Tread: Having nice deep grooves in your tires helps keep you from falling off the road in a rainstorm.  So we see that tire tread is important.  I rest my case.  I found a cool site that talks about how having 4/32's of an inch halves your stopping distance in rain, compared to the 2/32's you're legally required to have.  http://www.tirerack.com/tires/tests/testDisplay.jsp?ttid=85  For 2/32's, you can measure with an upside-down penny.  (How disrespectful!  Sorry Lincoln!)  If the tire reaches up past Lincoln's head, you're legally good.  For 4/32's, which is better, you can use an upside-down quarter and Washington's head.

When you do have to get those nice new tires, you're gonna want to put them on the rear.  If your front tires can't deal with water on a wet road and they begin to hydroplane, it's easier for you to control than if the rear wheels start hydroplaning and your tail comes out.  So you want the nice tires on the back to make sure that the rear of the car is solidly capable of handling rainy conditions.

General condition: If your tire is leaking, you know it, because it keeps going flat overnight.  If your tire has a big gouge on the outside wall of it, you know it.  If it has a gouge on the inside, I guess you're kind of screwed.  Generally speaking, holes on the sidewall are worse because the sidewall flexes with every rotation of the tire, worsening the hole and increasing the danger. Holes in the flat part of the tire (the part that meets the road) are less severe given that they flex less.

Change your oil.  How often?  Synthetic or regular?  Well, it depends on how much money you want to spend.  Generally you can follow the owner's manual on how often to change it.  (I don't though—I usually change every 5,000 miles as opposed to 7,500 in my owner's manual.)  And if you've got extra money, synthetic is better—there aren't any impurities and you can run that oil longer in your engine.  (Folks who advocate changing regular oil every 3,000 miles say you could go 5,000 with synthetic.  My guess is that if you're changing regular every 7,500 miles, you could do 10,000 with synthetic.  But I wouldn't.)  Also, when you're checking fluids, see if you're losing oil—if you drive a rotary, that's okay.  If you don't, it's not.  (Dear Mazda: Why did you stop producing the RX-8?  Are you going to abandon manual transmissions the same way you abandoned the rotary engine?  With remorse and reproach, Allison)

A point about octane.  Follow what's in the manual.  For most folks who aren't running on turbos and who don't drive sports cars, it'll be 87.  Putting 89 in your Corolla doesn't make it go faster or run smoother.  It actually negatively impacts performance since the engine is optimized for use of 87.

When to pay attention to your check engine light.  Always!  What I do is I at least go to Autozone or Advance Auto and have them read it.  I try to do that the same day the light comes on.  They can tell you if it's something not so bad like an emissions problem (Pepper's light is on right now for that), or something kind of scary like a misfire (if you remember Birdy...yeah that happened).  You can ask the nice folks there if your car will die if you wait until tomorrow to fix it.

I would say that if the light is accompanied by a noticeable change in the handling or ride, or any weird noises, I would go to a mechanic immediately.  Not that that's ever happened to me with a light on, and not that it necessarily would.  And remember I know nothing about mechanical things.  I just know what I do, and that the average person can't drop everything and run to the mechanic.  Keep in mind that I killed Birdy; take heed of the warning.  (In my defense: she was 13 years old and treated poorly before me and had 183,000 miles on the clock.  May she rest in peace.)

When your oil light comes on*.  Pull over RIGHT NOW.  Turn OFF the car.  Do not pass go (in fact, do not go at all) and do not collect $200.  Or you will potentially be paying upwards of $2,000 for engine replacement.  Quick note: I had a friend whose engine seized after he took it to Jiffy Lube for an oil change and they didn't screw the oil cap on all the way.  My word of advice is never to take your car to a crappy mechanic (that $5 you save is never worth the destruction, lies, and woe), and if your light comes on, heaven forbid, pull to the side of the road and make everything stop right now.

*Here's what you're ACTUALLY supposed to do. http://voices.yahoo.com/what-oil-light-comes-car-281127.html?cat=27 What's a lifter again?! I am so unqualified for this!

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