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Old 12-09-2012, 03:53 AM   #1
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Cool Engine braking bad for engine?

Lately I been practicing downshifting to 3rd or 2nd at speed 50km-60km to slow the car down for a turn or red light.
This would normally require me to suddenly rev my engine from 1500-2000 to 4000-5000.
Without the muffler, this manuver certainly turns a lot of heads at every corner.
But I am wondering if I do it all the time, would it blow my engine lets say within 200k miles? I plan to change oil every 15k with 7.5k oil filter change interval.

Note, I am not trying to destroy my engine. So trolls stay away
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Old 12-09-2012, 03:56 AM   #2
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I don't think it will. If anything, its your tranny not your engine

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Old 12-09-2012, 04:37 AM   #3
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It's not bad for your motor.

Here's how I look at it.

Engine braking = premature wear on clutch

Regular braking (clutch in or in neatrul) = brake pads.

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Old 12-09-2012, 06:08 AM   #4
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It's really no different than downshifting to 2nd to come out of a turn.

I engine brake all the time...original clutch (afaik)...but most of the time, I'll just take my foot off the gas and pretend I'm a huge semi.

If you slow down a bit, Merc, and stop rushing around, you'll just cruise easily and steadily without need of brakes at all!

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Old 12-09-2012, 06:31 AM   #5
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I've been using this technique for over 15 years and can tell you from experience that all this really does is make your brake pads last longer. Sure, it technically puts more wear on your clutch, but not a noticeable amount. I've never had a clutch go out prematurely due to this type of use. As long as you are not being excessive about it and down shifting from 5th to 2nd at 80mph or something like that you will be just fine.
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Old 12-09-2012, 07:19 AM   #6
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It is extra wear on the engine but not much. Like others have said, just don't get too extreme with it. I've actually thought about this recently because I do some engine braking: one downside is, people behind you might not realize you're slowing down because your brake lights aren't on.
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