Re: [MBZ] Parking car in gear

2007-11-27 Thread Curt Raymond

The only time I've ever used the parking brake on a hillstop was my driving 
test...

One foot on the brake, the other on the clutch. Release clutch until the engine 
starts to labor, release brake, quick dance to the throttle. In the case of a 
240D MASH throttle to floor, continue releasing clutch

-Curt

Date: Mon, 26 Nov 2007 22:05:28 -0700
From: Craig McCluskey [EMAIL PROTECTED]
Subject: Re: [MBZ] Parking car in gear
To: Mercedes Discussion List mercedes@okiebenz.com
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; charset=US-ASCII

On Tue, 27 Nov 2007 09:27:35 +1030 Hendrik  Fay
 [EMAIL PROTECTED]
wrote:

 Hendrik
 who likes the RHD 123 dash mounted hand brake and wonders how you do
 a 
 smooth hill start in a manual car with a foot operated park brake
 (eg. 
 the 124's)

Make sure the foot operated brake is well set.

Put transmission in neutral. Depress clutch.

Start engine and put transmission in gear.

Let out clutch and feed throttle to keep engine RPMs up.

Feel car lift off parking brake and start to move forward.

Pull parking (emergency) brake release knob and drive off smoothly.\

Works every time.


Craig

   
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Re: [MBZ] Parking car in gear

2007-11-27 Thread Alex Chamberlain
On Nov 26, 2007 3:21 PM, Mitch Haley [EMAIL PROTECTED] wrote:
 As for the suggestion to leave the lever in neutral so that the lever
 wouldn't get stuck in 'P' if the parking brake didn't hold on a hill,
 would you rather return to your car to find tension on the parking
 pawl, or perhaps it's better to find your car not where you left it
 if the p-brake doesn't hold? The 'P' on the tranny is there for
 redundancy in case the p-brake fails. Using it *except* when on a
 hill where it might be useful is silly.

Ditto.  Like the street signs in San Francisco say, CURB WHEELS - SET
CAR IN GEAR!

Alex Chamberlain
'87 300D Turbo et al.

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Re: [MBZ] Parking car in gear

2007-11-26 Thread Jim Cathey
 I have always been puzzelled how a car can continiously by held in
 position by the compression of 1 cylinder by leaving it in gear

It's not compression, really.  Just plain old friction.

-- Jim


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Re: [MBZ] Parking car in gear

2007-11-26 Thread Zoltan Finks
Peter:

I don't have any knowledge to add, but I want to celebrate someone
else's willingness to ask such an open question without flinching at
the inevitable scorn from the seasoned.

Brian

On 11/25/07, Peter Merle [EMAIL PROTECTED] wrote:
 I have always been puzzelled how a car can continiously by held in
 position by the compression of 1 cylinder by leaving it in gear ( manual
 tranny  ) . One would think that eventually ( after a few
 seconds/minutes ) the rings will leak air  and the car would then lurch
 fwd and then start a runway. This does not seem to happen though. Any
 thoughts on the physics involved?

 PEter

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Re: [MBZ] Parking car in gear

2007-11-26 Thread Mitch Haley

I saw a F250 Powerstroke go for a walk once on a lightly sloped parking lot. 
We came out of the store, and it was about six feet farther back than we
left it. I wasn't driving, but I'm pretty sure it could not have been in
creeper or reverse. The owner's driveway is steeper than that parking lot
and as far as I know it's never done that at home. After my Horizon hit
about 180,000 miles it would do that in reverse at the boat ramp, about one
compression stroke every 20 seconds. Before the cylinders started leaking
down the engine held the car and the boat on that ramp just fine. 

Mitch.

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Re: [MBZ] Parking car in gear

2007-11-26 Thread Hendrik Fay
So you're gonna test this by removing the spark plugs and parking on the 
side of a hill?
Let us know how you got on.once you're out of 
hospital..and got the insurance monkeys off your 
back.and the missus lets you back in the house if you promise to 
behave.well she might ban you from this list for talking you 
into doing dumb things.

Jim Cathey wrote:
 I have always been puzzelled how a car can continiously by held in
 position by the compression of 1 cylinder by leaving it in gear
 

 It's not compression, really.  Just plain old friction.

 -- Jim




   

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Re: [MBZ] Parking car in gear

2007-11-26 Thread Allan Streib
I've had the same thing happen in an old air-cooled Beetle.

Mitch Haley [EMAIL PROTECTED] writes:

 I saw a F250 Powerstroke go for a walk once on a lightly sloped
 parking lot.  We came out of the store, and it was about six feet
 farther back than we left it. I wasn't driving, but I'm pretty sure
 it could not have been in creeper or reverse. The owner's driveway
 is steeper than that parking lot and as far as I know it's never
 done that at home. After my Horizon hit about 180,000 miles it would
 do that in reverse at the boat ramp, about one compression stroke
 every 20 seconds. Before the cylinders started leaking down the
 engine held the car and the boat on that ramp just fine.

 Mitch.

-- 
1983 300D
1966 230

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Re: [MBZ] Parking car in gear

2007-11-26 Thread Kaleb C. Striplin
If you were parked on a steep enough hill it will start to roll back a 
little.  When I first started driving before I got my first car I drove 
my dads old 76 Ford F100 with a 3 on the tree.  On a steep hill it would 
roll back slightly.  We are not talking sudden rolling, it would just 
start to creep back.

Peter Merle wrote:
 I have always been puzzelled how a car can continiously by held in
 position by the compression of 1 cylinder by leaving it in gear ( manual
 tranny  ) . One would think that eventually ( after a few
 seconds/minutes ) the rings will leak air  and the car would then lurch
 fwd and then start a runway. This does not seem to happen though. Any
 thoughts on the physics involved?
 
 PEter 
 
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Kaleb C. Striplin/Claremore, OK
  94 E420, 92 300SD, 92 300D, 92 250D Turbo, 92 300E 4Matic,
  91 300D, 90 420SEL, 89 560SEL, 89 260E, 87 300SDL, 85 380SE 5.0 Euro,
  84 190D, 84 300D euro manny, 81 240D, 81 380SLC, 80 240D, 76 240D,
  76 300D, 72 250C, 69 250
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Re: [MBZ] Parking car in gear

2007-11-26 Thread Robert Rentfro
Isn't there also pressure against a pin/stop of some sort?
I was always taught to use park with e-brake. And, when on a hill/slope,
e-brake and neutral with no park.

Bob R.



-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Kaleb C. Striplin
Sent: Monday, November 26, 2007 7:54 AM
To: Mercedes Discussion List
Subject: Re: [MBZ] Parking car in gear

If you were parked on a steep enough hill it will start to roll back a 
little.  When I first started driving before I got my first car I drove 
my dads old 76 Ford F100 with a 3 on the tree.  On a steep hill it would 
roll back slightly.  We are not talking sudden rolling, it would just 
start to creep back.

Peter Merle wrote:
 I have always been puzzelled how a car can continiously by held in
 position by the compression of 1 cylinder by leaving it in gear ( manual
 tranny  ) . One would think that eventually ( after a few
 seconds/minutes ) the rings will leak air  and the car would then lurch
 fwd and then start a runway. This does not seem to happen though. Any
 thoughts on the physics involved?
 
 PEter 
 
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-- 
Kaleb C. Striplin/Claremore, OK
  94 E420, 92 300SD, 92 300D, 92 250D Turbo, 92 300E 4Matic,
  91 300D, 90 420SEL, 89 560SEL, 89 260E, 87 300SDL, 85 380SE 5.0 Euro,
  84 190D, 84 300D euro manny, 81 240D, 81 380SLC, 80 240D, 76 240D,
  76 300D, 72 250C, 69 250
http://www.okiebenz.com

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Re: [MBZ] Parking car in gear

2007-11-26 Thread Allan Streib
Robert Rentfro [EMAIL PROTECTED] writes:

 Isn't there also pressure against a pin/stop of some sort?  I was
 always taught to use park with e-brake. And, when on a hill/slope,
 e-brake and neutral with no park.

In my 300D when I park, I set the parking brake while holding the car
with the foot brake, before putting the transmission in park.  I feel
that this keeps stress off the transmission, especially on any kind of
slope.

Allan
-- 
1983 300D
1966 230

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Re: [MBZ] Parking car in gear

2007-11-26 Thread Robert Rentfro
That's exactly what the fella from whom I contracted the MB bug from in 1974
taught me to do.
Not really sure if it actually makes a transmission last longer...but it
can't hurt, I suppose.


Bob R.



-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Allan Streib
Sent: Monday, November 26, 2007 8:05 AM
To: Mercedes Discussion List
Subject: Re: [MBZ] Parking car in gear

Robert Rentfro [EMAIL PROTECTED] writes:

 Isn't there also pressure against a pin/stop of some sort?  I was
 always taught to use park with e-brake. And, when on a hill/slope,
 e-brake and neutral with no park.

In my 300D when I park, I set the parking brake while holding the car
with the foot brake, before putting the transmission in park.  I feel
that this keeps stress off the transmission, especially on any kind of
slope.

Allan
-- 
1983 300D
1966 230

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Re: [MBZ] Parking car in gear

2007-11-26 Thread Bill Ringgold
I saw something like that in Akron about 35 years ago on a sloped parking lot.  
About 15 cars slid out of their spaces when the owners parked warm tires on an 
iced lot.  Interesting to drive through.  I don't think compression leak-down 
had anything to do with that one.
BillR
Jacksonville FL

 


I saw a F250 Powerstroke go for a walk once on a lightly sloped parking lot. 
We came out of the store, and it was about six feet farther back than we
left it. I wasn't driving, but I'm pretty sure it could not have been in
creeper or reverse. The owner's driveway is steeper than that parking lot
and as far as I know it's never done that at home. After my Horizon hit
about 180,000 miles it would do that in reverse at the boat ramp, about one
compression stroke every 20 seconds. Before the cylinders started leaking
down the engine held the car and the boat on that ramp just fine. 

Mitch.

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Re: [MBZ] Parking car in gear

2007-11-26 Thread Jim Cathey
 test this by removing the spark plugs and parking on the
 side of a hill?

Spork plags?  What're those?  :-)

-- Jim


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Re: [MBZ] Parking car in gear

2007-11-26 Thread Timothy Robinson
That happens all the time here in the mountains. Four brakes engaged on iced
parking lot might hold the vehicle but just the drive wheels in park, you
shut the car door and the car slides away like a hockey puck.

The owner's manual on the 300D gives emergency instructions on how to jump
start the car if necessary by coasting it downgrade. This can be done with
the automatic transmission in the Benz not just manual trans.

 11/26/07 10:30 AM, Bill Ringgold at [EMAIL PROTECTED] wrote:

 I saw something like that in Akron about 35 years ago on a sloped parking lot.
 About 15 cars slid out of their spaces when the owners parked warm tires on an
 iced lot.  Interesting to drive through.  I don't think compression leak-down
 had anything to do with that one.
 BillR
 Jacksonville FL
 
 
 
 
 I saw a F250 Powerstroke go for a walk once on a lightly sloped parking
 lot. 
 We came out of the store, and it was about six feet farther back than we
 left it. I wasn't driving, but I'm pretty sure it could not have been in
 creeper or reverse. The owner's driveway is steeper than that parking lot
 and as far as I know it's never done that at home. After my Horizon hit
 about 180,000 miles it would do that in reverse at the boat ramp, about one
 compression stroke every 20 seconds. Before the cylinders started leaking
 down the engine held the car and the boat on that ramp just fine.
 
 Mitch.
 
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Re: [MBZ] Parking car in gear

2007-11-26 Thread Curt Raymond

I've never understood parking in neutral. What if the ebrake fails?
I've had several cars (mostly American) where the ebrake didn't work well at 
all...
The ebrake in my 190D is acceptable but not terrific. I use it only when I 
start the car on frosty mornings and then hop out to clear the windows.

-Curt

Date: Mon, 26 Nov 2007 08:02:49 -0700
From: Robert Rentfro [EMAIL PROTECTED]
Subject: Re: [MBZ] Parking car in gear
To: 'Mercedes Discussion List' mercedes@okiebenz.com
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; charset=us-ascii

Isn't there also pressure against a pin/stop of some sort?
I was always taught to use park with e-brake. And, when on a
 hill/slope,
e-brake and neutral with no park.

Bob R.

   
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Re: [MBZ] Parking car in gear

2007-11-26 Thread Hendrik Fay
Auto boxes have a parking engagement device, however I STRONGLY 
recommend that everyone get in the habit of using the hand brake, even 
on flat ground.
My Mum had an experience recently whereby the car chased her because she 
didn't put the car in P properly and either she did not pull on the hand 
brake hard enough (easy to do on a RHD 201 because the hand brake is 
close to the passenger seat and you sort of have to lean over to pull it 
on hard) or did not use it at all. Luckily the car missed her by a 
couple of feet but it could have been very nasty.
I recommend using P on autos all the time, engage hand brake and then 
place in P, if the hand brake is working properly the vehicles weight 
should not rest against the internal gearbox stop but that internal stop 
is a fail safe in case your hand brake lets go for whatever reason. 
There is absolutely no reason not to place the auto in P, they are 
designed to do this.
It is things like this 'when on a hill/slope, e-brake and neutral with 
no park' stuff that makes me a great believer in making new drivers take 
professional lessons so they don't pick up bad habits from 'experienced' 
drivers. Pro driving instructors are best placed to teach the ins and 
outs of motoring.

Hendrik
who likes the RHD 123 dash mounted hand brake and wonders how you do a 
smooth hill start in a manual car with a foot operated park brake (eg. 
the 124's)

Robert Rentfro wrote:
 Isn't there also pressure against a pin/stop of some sort?
 I was always taught to use park with e-brake. And, when on a hill/slope,
 e-brake and neutral with no park.

 Bob R.
   

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Re: [MBZ] Parking car in gear

2007-11-26 Thread Mitch Haley
Hendrik  Fay wrote:
 
 Auto boxes have a parking engagement device, however I STRONGLY
 recommend that everyone get in the habit of using the hand brake, even
 on flat ground.

My employer at the Saab shop lost a parking pawl about 20 years ago.
He left the car in the handicap spot closest to the store, flat parking
lot, lever in 'P', handbrake off. A delivery truck backed into his car,
no obvious bumper damage, but the Borg-Warner box didn't like it at all. 
Saab parking brakes in that era (Girling front disk parking/service brakes)
could lock the front wheels with ease. If he'd set the brake, there's
no way the tranny would have been damaged. 

As for the suggestion to leave the lever in neutral so that the lever
wouldn't get stuck in 'P' if the parking brake didn't hold on a hill, 
would you rather return to your car to find tension on the parking
pawl, or perhaps it's better to find your car not where you left it
if the p-brake doesn't hold? The 'P' on the tranny is there for
redundancy in case the p-brake fails. Using it *except* when on a
hill where it might be useful is silly. 

Mitch

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Re: [MBZ] Parking car in gear

2007-11-26 Thread Craig McCluskey
On Tue, 27 Nov 2007 09:27:35 +1030 Hendrik  Fay [EMAIL PROTECTED]
wrote:

 Hendrik
 who likes the RHD 123 dash mounted hand brake and wonders how you do a 
 smooth hill start in a manual car with a foot operated park brake (eg. 
 the 124's)

Make sure the foot operated brake is well set.

Put transmission in neutral. Depress clutch.

Start engine and put transmission in gear.

Let out clutch and feed throttle to keep engine RPMs up.

Feel car lift off parking brake and start to move forward.

Pull parking (emergency) brake release knob and drive off smoothly.\

Works every time.


Craig

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Re: [MBZ] Parking car in gear

2007-11-26 Thread Peter Merle
There appears to still be a lot of confusion even to myself as to how
the compression effect holds the car. I'm sure if you remove the spark
plugs ( glow plugs for us guys ) the internal friction is not a
significant contributor to keep the car stationary on a slope. If
compression has an affect why after xxx no of secs/hrs/days does the
vehicle not crank over to the next compression cycle? It means
eventually no matter how new the engine is air will leak past the
rings/valves.

BTW does a diesel parked hold it better on a slope that a gasser?

PEter



-Original Message-
From: Craig McCluskey [mailto:[EMAIL PROTECTED] 
Sent: 27 November 2007 07:05
To: Mercedes Discussion List
Subject: Re: [MBZ] Parking car in gear


On Tue, 27 Nov 2007 09:27:35 +1030 Hendrik  Fay
[EMAIL PROTECTED]
wrote:

 Hendrik
 who likes the RHD 123 dash mounted hand brake and wonders how you do a
 smooth hill start in a manual car with a foot operated park brake (eg.

 the 124's)

Make sure the foot operated brake is well set.

Put transmission in neutral. Depress clutch.

Start engine and put transmission in gear.

Let out clutch and feed throttle to keep engine RPMs up.

Feel car lift off parking brake and start to move forward.

Pull parking (emergency) brake release knob and drive off smoothly.\

Works every time.


Craig

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[MBZ] Parking car in gear

2007-11-25 Thread Peter Merle
I have always been puzzelled how a car can continiously by held in
position by the compression of 1 cylinder by leaving it in gear ( manual
tranny  ) . One would think that eventually ( after a few
seconds/minutes ) the rings will leak air  and the car would then lurch
fwd and then start a runway. This does not seem to happen though. Any
thoughts on the physics involved?

PEter 

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Re: [MBZ] Parking car in gear

2007-11-25 Thread Robert Bigham
I'll tell you: I don't know. - Tevye the milkman in Fiddler on the Roof. 

When one cylinder leaks down and the crankshaft turns, another 
comes up on the compression stroke.  Or so it seems to me.

The attempt to move the car with the transmission in any gear 
requires turning the engine faster than it might crank manually. In 
a lower gear, it really turns faster.  This I think reduces the tendency
of the car to move and self rotate the engine. 

Sometimes an old engine with weak compression will actually allow
a car to move a bit, a herky jerky bit, especially in top gear.

Robert

 [Original Message]
 From: Peter Merle [EMAIL PROTECTED]
 To: [EMAIL PROTECTED]; Mercedes Discussion List
mercedes@okiebenz.com
 Date: 11/26/2007 5:24:57 AM
 Subject: Parking car in gear 

 I have always been puzzelled how a car can continiously by held in
 position by the compression of 1 cylinder by leaving it in gear ( manual
 tranny  ) . One would think that eventually ( after a few
 seconds/minutes ) the rings will leak air  and the car would then lurch
 fwd and then start a runway. This does not seem to happen though. Any
 thoughts on the physics involved?

 PEter 




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