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-   -   Set parking brake properly.... (https://www.corvetteforum.com/forums/c6-corvette-general-discussion/2930357-set-parking-brake-properly.html)

glenB 10-13-2011 09:13 PM

This thread is a bunch of :bs

cclive 10-13-2011 09:21 PM

The e-brake (parking brake) is cable operated and uses shoes in a drum. It is a completely separate system from the service brakes which are hydraulic and discs. The best way to set the parking brake is to yank the handle up, not pull it steadily. Shoes in a drum (old fashioned drum brakes) are better for holding a car that is already stopped, disc brakes are better at stopping a car that is moving.:thumbs:

Streetk14 10-13-2011 10:38 PM


Originally Posted by dave pawlowski (Post 1578948164)
No. Just the opposite. You want the car to work against the compression of the cylinders.

It really doesn't matter. An engine is basically an air-pump and will have compression whether it is spinning clockwise or counter-clockwise. If you've ever tried to crank an engine over by hand (with a ratchet) when timing cams or whatever, you'd find there to be Resistance in either direction.

A 4-stroke engine has an intake, compression, power and exhaust stroke. When spun in reverse direction, the engine would build compression during the power stroke. The valves would both be shut and the piston would be traveling from BDC to TDC.

So it really doesn't matter what gear it's in - except that reverse is a deeper gear and should hold the car better.

haljensen 10-14-2011 01:18 AM


Originally Posted by Streetk14 (Post 1578955408)
It really doesn't matter. An engine is basically an air-pump and will have compression whether it is spinning clockwise or counter-clockwise. If you've ever tried to crank an engine over by hand (with a ratchet) when timing cams or whatever, you'd find there to be Resistance in either direction.

A 4-stroke engine has an intake, compression, power and exhaust stroke. When spun in reverse direction, the engine would build compression during the power stroke. The valves would both be shut and the piston would be traveling from BDC to TDC.

So it really doesn't matter what gear it's in - except that reverse is a deeper gear and should hold the car better.

A 4 stroke engine only turns one way, either clockwise or counter clockwise. One or the other.

Trans gears determine which way the wheels turn, not which way the engine turns.

Racer 10-14-2011 01:24 AM


Originally Posted by haljensen (Post 1578956236)
A 4 stroke engine only turns one way, either clockwise or counter clockwise. One or the other.

So it turns two ways, one way or the other way...:D

Triumph Jerry 10-14-2011 02:26 AM


Originally Posted by Speedforhire (Post 1578949468)
Gotta agree with the O.P..........the other day I was rushing it and forgot to apply pedal pressure and my car rolled forward about 5 inches once I opened the door........it almost wreaked havoc on my front fascia.......got a small, white paint smudge (which buffed out) from contacting the garage door.

I'm the OP and yes applying pedal pressure while setting the parking
brake is correct on cars using the rear disc brakes as parking brake.
BUT, ...as Swift pointed out to me, our C6's have auxillary shoes and
drums for the PB.
I didn't know this.
To set the PB on C6's .....just YANK it up.
...jerry

Swiftrider08 10-14-2011 07:26 AM


Originally Posted by Triumph Jerry (Post 1578956415)
I'm the OP and yes applying pedal pressure while setting the parking
brake is correct on cars using the rear disc brakes as parking brake.
BUT, ...as Swift pointed out to me, our C6's have auxillary shoes and
drums for the PB.
I didn't know this.
To set the PB on C6's .....just YANK it up.
...jerry

:thumbs:

Glad you gained a bit of knowledge from this discussion. :cheers:

davekp78 10-14-2011 08:37 AM


Originally Posted by haljensen (Post 1578956236)
A 4 stroke engine only turns one way, either clockwise or counter clockwise. One or the other.

Trans gears determine which way the wheels turn, not which way the engine turns.

When it's not running (i.e. parked) the engine can be turned either direction.
This discussion has gotten too silly.

AORoads 10-14-2011 09:00 AM


Originally Posted by dave pawlowski (Post 1578948164)
No. Just the opposite. You want the car to work against the compression of the cylinders.

I believe this is what Dave is referring to:

"Reverse Gear

What about reverse gear? As you can see in Figure 2, the reverse gear is slightly different from the other gears. Instead of the blue gear meshing directly with the red gear, these two gears are separated by a third gear, called the idler, which reverses the direction of rotation.

When a gear turns, its teeth push against the teeth of the meshed gear, turning this gear in the opposite direction. If the red gears are turning counter-clockwise, then the blue gears will be turning clockwise. However, in the case of the reverse gear, the idler gear will be turning clockwise; the blue gear will then be turning counter-clockwise, in the opposite direction from the other blue gears (remember this is possible because none of the blue gears are fixed to the blue shaft.)"

Which comes from this explanation of manual transmissions (Understanding YOur Transmission, Manual or Standard Transmission):

http://defdriving.wordpress.com/2010...transmissions/

Triumph Jerry 10-14-2011 09:35 AM


Originally Posted by Swiftrider08 (Post 1578956839)
:thumbs:

Glad you gained a bit of knowledge from this discussion. :cheers:

Yep, that's what it's all about. I thought you were giving me the
business, I believe it was you're 4th post you mentioned rear brake
shoes and that's when I got it.
thanks ...jerry

Streetk14 10-14-2011 10:06 AM


Originally Posted by haljensen (Post 1578956236)
A 4 stroke engine only turns one way, either clockwise or counter clockwise. One or the other.

Trans gears determine which way the wheels turn, not which way the engine turns.


Yes, a 4-stroke engine will only run in one direction. But, when the engine is off, it can be cranked either direction by mechanical force. Park on a steep enough hill (pointing up the slope) in first gear, and the engine can and will crank backward if forced to.

And if during this same scenario (parked on very steep hill pointing up the hill) the transmission was in reverse, the engine would be forced to turn it's regular direction of rotation by mechanical force. Make sense?

Streetk14 10-14-2011 10:09 AM


Originally Posted by dave pawlowski (Post 1578957167)
When it's not running (i.e. parked) the engine can be turned either direction.
This discussion has gotten too silly.

Thank you

Larry/car 10-14-2011 10:24 AM

What have we learned? The parking brake is sometimes called an emergency brake that doesn't work too well in an emergency. The parking brake system is independent of the main brake system. Hold car with main brake system prior to setting parking brake to hold car from moving while transitioning between brake systems. Always use park, auto transmission or place manual transmission in reverse, in addition to parking brake, when parking vehicle.

Bone Daddy 10-14-2011 01:22 PM

Oh is that what I'm doing wrong? .... Perhaps that explains why the E-brake in these cars suck so bad.

I have been on aggressive slopes before and I had to shut down engine and leave in-gear (manual) just to exit car momentarily.

I'm on my 3rd C6 and will never get over that the stupid handle will not go all the way flat.

Poor engineering on this part of the car the e-brake is.

hulksdaddy 10-14-2011 01:50 PM

5th sign the Apocalypse is upon us.....
 
4 pages about the parking brake. :crazy2:

ohmy 10-14-2011 02:19 PM


Originally Posted by Triumph Jerry (Post 1578938431)
Using the lever alone a woman would not get enough pressure to
hold the car.

that statement was so funny!!! and dumb... if a person doesn't have enough strength to pull the parking brake they probably can't turn the steering wheel either! LOL

thanks for a great laugh, that was way worth the click ;)

Triumph Jerry 10-14-2011 02:34 PM


Originally Posted by ohmy (Post 1578959980)
that statement was so funny!!! and dumb... if a person doesn't have enough strength to pull the parking brake they probably can't turn the steering wheel either! LOL

thanks for a great laugh, that was way worth the click ;)

It happened to Lisa this week, did $5,000 damage to her ZR1
and she was really hurt too!
Didn't you read her thread?:crazy:

nmerhaut 10-14-2011 03:07 PM

Just carry a brick in the car like I did in the 50s.

golferdude 10-14-2011 04:11 PM

Will this cause damage?
 

Originally Posted by Streetk14 (Post 1578957872)
Yes, a 4-stroke engine will only run in one direction. But, when the engine is off, it can be cranked either direction by mechanical force. Park on a steep enough hill (pointing up the slope) in first gear, and the engine can and will crank backward if forced to.

And if during this same scenario (parked on very steep hill pointing up the hill) the transmission was in reverse, the engine would be forced to turn it's regular direction of rotation by mechanical force. Make sense?

This makes perfect sense. However will forcing a 4 stroke to turn in the opposite of the "run" direction cause any undue stress or harm to the engine? Out of fear of causing engine damage by turning it in the wrong direction I would always park in reverse if facing up a steep incline and 1st if facing down a steep incline. Should reverse always be the gear of choice regardless?

azschmeh 10-14-2011 04:17 PM

:: Unsubscribing ::

This. thread. is. ridiculous. Get wheel chocks.


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