By on February 8, 2019

2013 Scion FRS navy winter - Image: © Timothy CainV writes:

Here are two questions from a regular, and grateful, Piston Slap reader:

  1. How long is best to idle a gasoline engine after starting & before driving off: [A] a few minutes? [B] one minute? [C] until the revs settle down? [D] no need, just drive right off? Assume ambient temperature well above freezing; a shifting style on the sedate side; and a car made in the past 15 years so engine has EFI and EGR and all that. Current ride’s engine is naturally-aspirated and direct-injected, but I sure would appreciate knowing the proper protocol for other combinations too, if different. Several sources over the past years have all agreed on [D] for modern engines, but then just a few months back a Car & Driver column said [A], so now I’m unsure again.
  2. Leaving a car (stick shift *of course*) parked: best in gear, best in neutral, or doesn’t matter? Assume the parking space is either not sloped at all, or is sloped and I know enough to turn a front wheel into the curb toward the down slope. (Read More…)
By on January 19, 2016

 

2007 Nissan Frontier. Image: Nissan

TTAC commentator suburbanokie writes:

Greetings,

Another longtime listener, firsttime caller … I have a two-parter.

First: My 2007 Nissan Frontier will soon be due for a rear brake job. I’ve never worked on rear disks. Should I replace the emergency-brake shoes as well as the service brake pads, or will a simple inspection of them do for now? Also, I’ve had varying advice here: should I have the rotors turned, replaced or simply let them be if no pitting or warping is detected?

Second: Last year, my father and I replaced the U-joints on the prop shaft and since that day there’s a vibration around 55-60 mph. Whether I’m in 4th, 5th or 6th gear is irrelevant and the vibration goes away above and below that range. I do remember when trying to remove the old U-joints, my father took a small chunk, maybe a half-inch square area, out of the shaft right at one of the ends, and I’m pretty sure this is causing it, but is there anything I can do about it? (Read More…)

By on June 11, 2015

brakes. Shutterstock user MR.YURANAN LAKHAPOL

Gaurav writes:

Hello Sanjeev, (oh dear…*facepalm*- SM)

I am writing you from India. I have a Jetta MkV 1.9 TDI with automatic transmission. It has done about 74,000 km. About a month back, I got the the brake fluid replaced as the service adviser suggested it should be replaced once every 60-70k km. After I got the car back, it felt like the brake efficiency had decreased. I was told its normal and after driving for some time it would be okay. Unfortunately, it never improved. (Read More…)

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