mac
  • Member for 9 years, 6 months
  • Last seen more than a month ago
  • Cambridge, MA
How to prevent body damage and rust from salted roadways?
8 votes

Regular washing and waxing is your best bet. We kept our cars in one piece through the Rochester, NY winters with nothing more than this. The wax provides a sacrificial protective coating for the ...

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motorcycle headlight with single SPDT relay
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4 votes

Your single bulb has two filaments, one for the low beam and one for the high beam. If you look at the back of the headlight bulb, there's three prongs. One is for the low beam, one is for the hi beam,...

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Does breakaway torque match tightening torque?
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3 votes

No, absolutely not. During tightening the torque you’re putting in gets “used” in three ways: Overcoming friction between the head of the bolt and the joint surface Overcoming friction between the ...

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Can you stop fuel delivery to one cylinder of a 2003 Ford F150 with 5.4L Triton Engine?
5 votes

Your engine does have one injector per cylinder (multipoint fuel injection), which is a good start. Some engines have single point injection, in which case you could not selectively cut fuel to a ...

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2004 Jetta - Secondary Air Injection System Incorrect
3 votes

The secondary air injection system is part of the emissions control system. Under certain operating conditions, the secondary air pump runs to bring fresh air into the exhaust system. It supports the ...

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What are the temperature ranges for different oil grades?
1 votes

What's important to protecting your engine is having the correct oil viscosity under the anticipated operating conditions (most importantly anticipated oil temperatures). As Bob Cross pointed out, ...

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Chain Tightening Guidance
2 votes

It is common for a chain to be tighter in certain spots than others, owing to some slight eccentricity of the sprockets. The generally accepted practice is to adjust chain tension relative to the ...

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Unknown part fell out of my motorcycle
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6 votes

Those are definitely devices for holding hair in place. As for what purpose (if any) they were serving in your motorcycle, one can only guess!

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What is the temperature at steering rack?
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1 votes

I don't think you ought to be designing for average temperature--I think you're more looking for a peak temperature under expected conditions for your application. Depending on atmospheric and ...

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Extremely high then fluctuating idle at very cold temperatures
1 votes

I don't know when exactly Honda stopped programming this behavior into their cars, but I do know that what you described is a warm-up sequence that some older Hondas go through by design. First a high ...

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When should we change the machine lubricant? Cold engine or hot engine?
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7 votes

The oil pan never gets hot enough in normal operation to soften the metal of the oil pan or the drain plug, and any thermal expansion at that temperature also shouldn't be much of a concern. For me ...

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Change in exhaust note after extreme backfires--what did I break?
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5 votes

Warmer weather this weekend provided an opportunity to try to get the bike running again. I wanted to give myself the best shot possible, so I installed new spark plugs and picked up some starting ...

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Old winter tires on new 2013 Toyota Highlander?
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5 votes

The wheel bolt pattern is different between the 2011 Outback and the 2013 Highlander (5-100 vs. 5-114), so if your old snow tires are mounted on wheels, you cannot use those wheels on the Highlander. ...

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Mass Air Flow Expected Values
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6 votes

The 50 g/s max flow reading that you are getting is far lower than what merely altitude can explain. The chart above shows that at about 5,200 ft above sea level, the density of air is 83% of what ...

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Rounded Oil Drain Plug Dodge RAM
5 votes

From your description it is a bit unclear what the problem with the drain plug bolt is. I'm assuming that the hex head on the bolt has become rounded, and as a result your wrenches and sockets are ...

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Preventive maintenance for a long-distance tow
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3 votes

Safety First Check the condition of your tires and brakes before the trip. They will be working overtime pulling a trailer. Check brake pads and rotors and/or shoes and drums, and consider a brake ...

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Damage to Audi differential with new front tires and old rear tires
6 votes

See Is it OK to replace only 2 tires on an AWD car?. If you call different Audi dealers you're likely to get differing answers regarding how much tread depth difference is OK for the all-wheel-drive ...

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Automatic & manual transmission
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6 votes

A friction clutch and a gearbox makes a very efficient transmission (i.e. very little power is "lost" in the transmission). This system is relatively simple for a driver to control manually using a ...

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12v Acc/Switched vs 12v Always On
6 votes

If you place a jumper wire between a always-on 12V source and a switched 12V source, you've now turned your switched wire into an always-on wire (with power supplied from your original always-on ...

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Does tire size and/or tread wear significantly affect speed and speedometer accuracy?
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13 votes

You can calculate the size of the effect from simple geometry. Tire wear reduces the diameter of the tire, which reduces the circumference of the tire. New passenger car tires typically come with 10/...

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What do relatively dirtier front hubcaps indicate?
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10 votes

Much of what makes wheels appear dirty is brake dust. Brake dust is wear particles from the brake pads and rotors (or from linings and drums, in the case of drum brakes). The braking effort in most ...

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Daytime running light failure -- one side only
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1 votes

With the additional information you have posted, I am in agreement with your initial assessment that a relay or relays are to blame. It sounds like you can get both high and low intensity out of the ...

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VW Golf TDI makes a 'sneezing' sound on startup
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8 votes

We have a Mk4 TDI Jetta that makes a sound after startup that might be described as a sneeze. I'm fairly confident that it's the starter motor's overrun clutch. As soon as the engine "starts," it ...

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Washing coolant system with dish soap to remove oil residue
8 votes

I'm assuming that this person was advocating putting a small amount of dish soap in the water used to do a coolant system flush. I would not do this to my car as routine/preventative maintenance, I ...

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Flickering lights and volt light on 2004 PT Cruiser
0 votes

You can do a very simple check of your alternator by simply measuring the voltage across the battery terminals with the car running. A good alternator would put you somewhere around 14 volts. While ...

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Hyper-miling and stress on engine oil
4 votes

First, the driving style that you described certainly places less stress on both tires and engine oil. You avoid hard braking and hard acceleration. This puts less wear on the tires than someone who ...

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Differences and Recommendation between Steel and Alloy Wheels for Winter?
Accepted answer
12 votes

Bob cross makes some good points, however, I would offer the following opinions: Winter tires don't have the dry grip that summer tires do. Your "high performance" handling will be limited with your ...

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Can an engine be 'too lean' at 0%/closed Throttle?
Accepted answer
2 votes

As Brian Knoblauch stated, fuel injection systems normally shut off the fuel delivery completely when the engine is in an "overrun" state, i.e. when you get off the accelerator completely with the ...

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Tire compatibility
1 votes

Short answer: it doesn't seem like there's a good way to use your old tires on your new car. You don't state in your question whether the winter tires you have from your old car are mounted on a set ...

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Can all transmissions be shifted to neutral at any speed?
5 votes

First, I take issue with the premise of your question a little bit--just because one could hypothetically shift to neutral does not mean "there is no such thing as uncontrolled acceleration." How ...

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