Piston Slap: NVH Nightmares No More? (Part II)
Doug updates us:
Hello, just an update on this problem: an indy shop I had used before on another Mercedes put my 2007 S550 on a lift and diagnosed it with a failed transmission mount. Just a little $60 part at the tail end/output end of the transmission.
Because it had failed, the transmission was essentially resting on the frame crossmember, pretty much directly beneath the center console/armrest where I felt the vibration so acutely. I was skeptical it could be that simple/cheap, but sure enough it eliminated the problem! It’s super smooth and silent now. The other likely culprits, the flex discs at each end of the driveshaft and the center carrier bearing for the two-piece drive shaft, all look new and can’t be original. They must have been replaced by the first owner.
Piston Slap: BANG! The Lost Art of Exhaust Tuning?
Piston Slap: A Scion's Ideal All Season Tire?
TTAC Commentator Sam Hell Jr. writes:
The first car I bought for myself was a 2011 Scion tC. Compared with some other decisions I made three years ago (cough, cough, career in human resources, cough), this one’s turned out okay — to date, I’ve put 40k on the odo with no repair costs but regular maintenance, and the hatchback utility and decent fuel economy have both matched up well with my needs. I’ll probably have the tC paid off this year, and I’m looking forward to debt-free living, so the car and I are stuck with each other for some time to come.
My biggest complaint is with the car’s interstate manners. I take a handful of significant road trips every year, and at freeway speeds on anything but pristine pavement (of the kind one does not often traverse on I-80), the ride gets jittery, and the tire noise is, well, tiresome.
Piston Slap: Gently Tapping, Tapping at My Ranger's Door?
This is the second question I’ve asked on here, and while I didn’t even follow the advice I received last time and here I am again! Last time I was asking about a sporty car, and I ended up getting a 2007 Ford Ranger, 2.3L, 5 speed, with all of 35,000 miles on it. It is a regular cab with nothing extra on it, a real throw back, manual windows, no AC, a nice basic truck with nothing to go wrong right?
Piston Slap: Is It Piston Slap? Ja-nee, Baby!
Mu-een (from Cape Town, South Africa!) writes:
Hi I would like to know what is the difference sound of a tappet noise, or bad rocker, or a piston slap. Thanks regards.
Super Piston Slap: NVH = Killing You With Kindness?
While Noise, Vibration, Harshness (NVH) control built into a modern machine is normally your friend, it often kills you with kindness. That’s when NVH hides things that should never be hidden. Shameful. Cowardly. Pathetic. And while I wasn’t expecting this level of deceit when merely replacing the shift knob on the otherwise stock transmission in my 2011 Ford Ranger…well it was thrust upon me. And it can happen to you, too.
The Best Of TTAC: The Art Of Noise
[Editor’s note: This piece was originally published in February 2009, and like so much of TTAC’s content, it’s timeless enough to deserve another moment on the front page. Enjoy!]
Rolls-Royce used to advertise the fact that their cars were so quiet that the loudest sound you heard was the [analog] clock ticking on the dash. Who said the British don’t do hyperbole? As a quiet car connoisseur, I’d have to say a Clinton-era Cadillac provided the quietest ride I’d ever experienced; if the time was one of peace and prosperity, then so was the car. Nowadays, automakers are telling us that their cars are quiet, or at least quieter than ever before. I’m not buying it. A number of recent drives have been notable for their aural uncouthness. So I set out to find the truth about automotive sonic signatures. Has nostalgia dimmed my memory (if not my hearing)? Is progress on the noise suppression front been less impressive than industry propaganda would have you believe?
Listen To The Sound Of Porsche's Four-Cylinder Future
For the first time since the days of the 912, Porsche will be selling cars with a boxer-four engine. This new engine will power everything from the forthcoming “Baby Boxster” to the next generation of Boxster and Cayman, likely differentiated by different states of turbocharged tune. Here, a mule of the next-gen Cayman (released in Europe next year), which is growing to accommodate the new entry-level model, shows off the sweet sound of its new turbocharged 2.5 liter four-banger, which is rumored to put out 365 HP in “S” trim. And by “sweet sounds” I mean, it sounds a lot nicer than the 2.5 liter boxer in my girlfriend’s Impreza… although some of our more discriminating readers might feel that it’s still not up to Porsche standards. What say you?