XPost: alt.home.repair
From: xenolith@optusnet.com.au
On 4/3/2022 9:51 am, Jacob Jones wrote:
> On Fri, 04 Mar 2022 09:37:46 +1100, Bob F wrote:
>
>> On 3/3/2022 12:59 PM, Jacob Jones wrote:
>>> On Fri, 04 Mar 2022 07:49:46 +1100, Bob F wrote:
>>>
>>>> On 3/3/2022 12:03 PM, micky wrote:
>>>>> In alt.home.repair, on Thu, 3 Mar 2022 12:47:28 -0600, Paul in Houston
>>>>> TX wrote:
>>>>>
>>>>>> micky wrote:
>>>>>>> Is red-lining worse, better, or the same when the engine is
>>>>>>> driving the
>>>>>>> wheels as when the wheels are driving the engine?
>>>>>>>
>>>>>>> I use the engine to slow down when going down hill, and today, for
>>>>>>> example, I put the ATransmission into 2nd and then engine went
>>>>>>> briefly
>>>>>>> to 5500, the apparent red line. For several seconds was at 5000
>>>>>>> and
>>>>>>> even longer at 4500.
>>>>>>
>>>>>> I did that exiting the freeway in my last Toyota.
>>>>>> It sucked a valve into the combustion chamber and broke a piston rod
>>>>>> destroying the engine. I gave it away to a needy person who
>>>>>> installed a
>>>>>> used engine and ended up with a nice car.
>>>>> So you're suggesting I shouldn't do it?
>>>>> Unless your freeway was going very steeply down hill, I would
>>>>> think you
>>>>> came close to the redline even less time than I have!!
>>>>> This is a 2021 or 2022 Citroen C-3. A rental with only 9000 miles on
>>>>> it, so it must be new. I think I bought the insurance, but
>>>>> regardless,
>>>>> I don't want to hurt the car. mAYBE I shouldnt go lower than 3rd
>>>>> gear
>>>>> and rely on the brakes for anything more.
>>>>
>>>> A motorcycle shop owner heard me downshift to slow as I approached
>>>> his lot, and immediately told me that brakes were a lot cheaper to
>>>> replace than engine and clutch.
>>> Rather a silly comment if you end up crashing because the brakes
>>> overheat and you can't stop.
>
>> He was right.
>
> No he was not when you change down before there will be any red lining.
>
>> Reving to high speeds to slow down can quickly damage your engine.
>
> But changing down so you don't redline doesnt.
>
>> That should not be general practice if you care about your vehicle.
>
> That's wrong too. Doing it properly does produce less brake wear.
So does driving that saves wear and tear on both brakes and clutch. If a
driver has a need to brake hard, either way, maybe it's time to re-learn
how to drive.
>
>> If your brakes fail on a steep hill, OK. But doing that rather than
>> keeping your speed below the over-rev point going down hills is just
>> stupid. Use your brakes for exiting the freeway, definitely better
>> than over-reving.
>
> But perfectly possible to not over rev in that situation.
--
Xeno
Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)
--- SoupGate-Win32 v1.05
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