E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > E46 BMW > General E46 Forum

General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

Closed Thread
 
Thread Tools Search this Thread Rating: Thread Rating: 1 votes, 1.00 average. Display Modes
Old 12-09-2012, 03:53 AM   #1
MercForHire
Registered User
 
Join Date: Mar 2011
Location: Waterloo,Ontario
Posts: 4,406
My Ride: 323Ci 5 Speed Black
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
MercForHire is offline  
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 12-09-2012, 03:56 AM   #2
j_block
Registered User
 
Join Date: Apr 2011
Location: SA TX
Posts: 1,239
My Ride: 2003 325i
I don't think it will. If anything, its your tranny not your engine

Seet from my SPH-D700 using Bimmer App
__________________
j_block is offline  
Old 12-09-2012, 04:37 AM   #3
TArse
Registered User
 
Join Date: Nov 2010
Location: Columbus, GA
Posts: 665
My Ride: 03 330xi, 87 325is
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.

Money talks.
TArse is offline  
Old 12-09-2012, 06:08 AM   #4
dmax
Registered User
 
dmax's Avatar
 
Join Date: Aug 2006
Location: NJ
Posts: 22,802
My Ride: '99 328i 1.04646 mu
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!

(Oh, damn...sorry, Merc...missed your 'no trolls' request!)

D
__________________


Performing at the Comedy Cove--595 Morris Ave. Springfield NJ reservations 973 376-3840

A recent set

dmax on the radio every Wednesday 7-9 p.m. NYC time. Call in! (661) 449-9340 watsonnwatson.com
dmax is offline  
Old 12-09-2012, 06:31 AM   #5
Ruthlessone3k
Registered User
 
Join Date: Dec 2012
Location: Germany
Posts: 128
My Ride: 323i
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.
Ruthlessone3k is offline  
Old 12-09-2012, 07:19 AM   #6
LeMansteve
Registered User
 
Join Date: Nov 2008
Location: USA - GA
Posts: 1,650
My Ride: '04 330i 6mt ZSP ZPP
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.
__________________
BMW CCA member - Peachtree Chapter
LeMansteve is offline  
Closed Thread

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON





All times are GMT -5. The time now is 05:17 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use