Category: Piston Slap

By on August 27, 2014

 

(photo courtesy: http://forums.bimmerforums.com)

Pick Up The Pace! (photo courtesy: http://forums.bimmerforums.com)

Longtime TTAC Commentator ajla writes:

Hi Sajeev,

I do a more through job at the time of purchase, but every year after I do a drain/refill on the radiator and replace some transmission fluid by using my fluid extractor to vacuum up as much ATF as possible through the dipstick tube.

I know that I’m not getting all the fluids exchanged this way, but my question is how much of a positive impact is this regiment actually having on my cars? Am I just wasting my time? I haven’t suffered a mechanical failure since I started doing this, but I don’t know if that proves much.

Keep in mind that the vehicles I tend to own are 20 to 30 years old.

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By on August 26, 2014
(photo courtesy: autozone.com)

(photo courtesy: autozone.com)

Pete writes:

Hey Sajeev, I got one for you.

Several engines nowadays are set up to operate on half their cylinders under light-load conditions. Would the design considerations for piston rings vary from those normally used for such cylinders that are only used part-time? The question arises in the context of a 2009 V6 Accord that is currently in the Honda dealer’s shop to have the piston rings replaced at the manufacturer’s expense to cure a continual oil consumption and spark plug fouling problem.

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By on August 20, 2014

 

(photo courtesy: surftherenow.com)

Pat writes:

Hi Sajeev,

I have a question about driving style that I’d like to pose to you and the B&B. Part of my highway commute is a steady 2 mile grade. With a running start of 75 mph, my 2007 Mazda B2300 slows to about 62 mph by the top of the hill when I keep it in 5th gear, with the engine turning about 2000 rpm. I can maintain 70+ if I drop into 4th and floor it, but I’m a cheapskate at heart. My question is, is it really more efficient to lug up the hill in top gear, or am I just kidding myself and doing irreparable damage to my engine? Read More >

By on August 18, 2014

(photo courtesy: www.8thcivic.com)

TTAC regular David Holzman writes:

When my scan gauge says my engine is under 99% load, and I’ve only pushed the gas pedal about halfway down, does that mean, as I suspect, that I can floor it and I’m not going to get more than a drop more power out of it? 

And, in a modern car (’08 Civic, stick), will the computer control prevent me from wasting gas by pushing the gas pedal beyond the point where I’ve reached 99% load?

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By on August 13, 2014

photo courtesy: flickr.com

Gareth writes:

Good afternoon Sajeev,

Read your latest and I’m determined to help you out. I recently had a bone-stock 87 CRX Si follow me home from an impound auction and, if I can get the damn thing through an Ontario Safety Inspection, I’ll let TTAC’s very own Derek K drive it.

Therein lies the rub, or brake rub really. The front discs were rubbing, a lot. Constant grinding sound as the wheels turn. I have since removed/lubricated the caliper sliders (they were a bit stuck from sitting) and measured the discs and pads using a measuring tape and straight edge, everything is above min specs.

With the pin lube the grinding noise has abated somewhat but continues, worst is passenger side.

The discs don’t feel warped (no front shudder under hard braking).

Your thoughts?

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By on August 11, 2014

Don’t be so dense, airhead. (photo courtesy: http://www.full-race.com)

TTAC commentator Land Ark writes:

Sajeev:

I recently acquired a 2007 Honda Civic EX sedan from a neighbor who moved out of the country. I got a really good deal on it and for the most part it’s in good shape. It has 80k miles, 5 speed, and one major flaw. The air conditioning is a little bi-polar; sometimes if blows cold and sometimes not. Read More >

By on August 6, 2014

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Longtime TTAC commentator Mikey writes:

Sajeev,

I bought a 2014 Impala LT with a 2.5 four cylinder, and a 6 speed auto. I’m a 60 year old guy, that’s driven more cars than I can count. I’m still in awe that the engineers have figured out a way to move a car with the weight and size of the Impala with a 155 cu. in. engine. I love the car, with its comfort, and size, it suits my needs perfectly. I’m getting great gas mileage, with mostly city driving. Were flirting with 5 dollars a gallon up here.  I’m willing to sacrifice power for economy.

I’m rarely on the highway these days.  However I do find that at highway speeds{ 75 mph or so} the slightest touch of the gas pedal, will cause a down shift. The tach will jump from 2200 up to the high 3000′s in an instant. Does the 6 speed down shift sequentially, 6 to 5? Or will it go back 6 to 4th? Read More >

By on August 5, 2014
frpcustoms

photo courtesy: frpcustoms.com

TTAC commentator 1trikpny writes:

Hi, I’ve got a 2005 Mustang GT Deluxe,5spd, no Leather, no options. Black with 18″ chrome wheels, 285/35 Sumitomo HRT-Z 3′s, I’m the second adult owner.The previous owner bought it new, and at 40,000 miles installed a Saleen Supercharger with a Brenspeed Stage 3 tune. 500 hp at the crank. Currently at 63000 miles. I’ve added BMR LCA’s, Relocation brackets, and Panhard bar. this car has been very well maintained all of it’s life. No smoke, no noises, everything is just right.

So what’s the problem?
Read More >

By on July 30, 2014

 

Driveway Smudge

TTAC Commentator Ralph Schpoilschport writes:

Hi Sajeev,

Got a quick one for you and only asking because you begged!  But.  I am preparing to make a 3000 mile one-way trip from beautiful Vermontto, well, not so beautiful southern CA.  My rig is a 1997 Toyota 4Runner (V6, 5 speed manual).  Known problems: leaking rear diff (rust cracks) and a muffler on its last leg.  Spark plugs, starter, timing belt and water pump are recent repairs/maintenance.  As I type, an attempt is being made to seal the rear diff.  If that is successful I am having the mechanic give the chassis a once-over.

If the inspection is clear or things are easily fixed I am planning on making the trip with this car.  I figure the car is worth approx $2500 – 3000 as it sits.  Am I nuts? Read More >

By on July 28, 2014

20140618_104104

TTAC Commentator Weltron writes:

Hi Sajeev!

The car I am writing about today is my winter beater, which is a 1999 Ford Escort SE sedan which says it has a tick over 155,000 miles. (Pictured above) The problem I’m having with it is it it getting dreadful gas mileage. My average tank is about 19 miles to the gallon (in comparison that is what my twin turbo straight six Volvo gets around town). Over the winter I replaced both of the o2 sensors and got a marginal improvement (about .4 mpg).

And here’s the kicker: the dumb thing runs perfectly. No error codes or anything. Idles smooth and everything (well as far as Escort refinement goes). When I go on the highway (which is fairly often) I can see upward of 21… If I’m lucky. Read More >

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