Factory JCW Talk (2009+) Discussion of the factory-built 2nd Gen JCW MINI Cooper S, and all unique aspects of this trim.

N14 JCW engine, good, bad, or run away!

  #1  
Old 05-03-2018, 02:53 PM
SD200
SD200 is offline
1st Gear
Thread Starter
Join Date: Apr 2018
Posts: 16
Likes: 0
Received 0 Likes on 0 Posts
N14 JCW engine, good, bad, or run away!

I bought a new 06 cooper S (supercharged version) and was quite happy with the car, put 78k on it and never had any real issues.
Now I am in the market for a JCW cooper clubman and wanted some feedback on if these are time bombs or if they can be reliable?
I know that the internals of the JCW are different and wanted to know if these are more or less reliable than a cooper S with the N14?
I have seen quite a few posts on this site warning of the N14 due to timing chain issues and build up on the valves.

thanks,
 
  #2  
Old 05-03-2018, 09:24 PM
squawSkiBum
squawSkiBum is offline
Moderator
Join Date: May 2012
Location: San Francisco Bay Area
Posts: 1,567
Received 191 Likes on 162 Posts
The big issues with the N14 can be addressed - get the revised valve cover to reduce the carbon buildup on the intake valves, and the updated timing chain tensioner. Then make sure to maintain the oil level and to 5K oil changes.

The JCW version has a bigger turbo, lower compression ratio, and revised ECU tuning but otherwise is the same engine. (might be a few other differences I am forgetting but those are the big ones, check realoem.com to be sure.)

It will never be an engine like in my Acura that has gone 300K with just oil changes, plugs, and a timing belt every 100K. But the issues for which the N14 became notorious can be solved.
 
The following users liked this post:
Dogsforever (07-02-2018)
  #3  
Old 07-02-2018, 09:10 PM
Dogsforever
Dogsforever is offline
Neutral
Join Date: Feb 2018
Location: East Tennessee
Posts: 3
Received 0 Likes on 0 Posts
Is the revised valve cover an aftermarket part or dealer item?
 
  #4  
Old 07-02-2018, 10:05 PM
blue al's Avatar
blue al
blue al is offline
4th Gear
Join Date: Aug 2007
Location: oxford england
Posts: 467
Received 11 Likes on 9 Posts
https://www.realoem.com/bmw/enUS/par...&q=11127646555

Is the part number visible on the outside?

Or do I need to remove it confirm which version I have?
 
The following users liked this post:
Brownguy01 (05-01-2019)
  #5  
Old 07-03-2018, 08:20 AM
squawSkiBum
squawSkiBum is offline
Moderator
Join Date: May 2012
Location: San Francisco Bay Area
Posts: 1,567
Received 191 Likes on 162 Posts
To determine which one you have, figure out the production date of your car and then look it up on realoem.com. The updated valve cover design (link above) shows as superceding the earlier part numbers. It is a MINI part.
 
  #6  
Old 07-03-2018, 12:34 PM
ECSTuning's Avatar
ECSTuning
ECSTuning is online now
Platinum Sponsor
Join Date: Jan 2013
Location: Wadsworth,OH
Posts: 27,710
Received 556 Likes on 536 Posts
I have the n14 JCW 2012 and its been very good. I think the 2009-2010 JCWs had the most issues ( like the early non JCW N14s 2007-2010) with the older part timing chain and tensioner. And the newest valve cover and HPFP. On the cover the last 6 digits or show. The older covers I believe dont have the newer megplast logo on the right hand side.

Newest: 11127646555

These are the older part numbers for you:

Previous Revisions
11127561714
11127572854
11127585907
 
__________________

Have MINI questions? Need MINI answers? Live Chat us! 8:30am to 12:00am Midnight EST
[email protected] | [email protected] | INSTAGRAM | FACEBOOK
Customer Service Hours: 8:00 AM to 8:00 PM EST|Sales Team Hours: 8:00 AM to 11:00 PM | Saturday 10AM to 7PM EST 800.924.5172
  #7  
Old 07-04-2018, 04:02 PM
cornjuice's Avatar
cornjuice
cornjuice is offline
Banned
Join Date: Sep 2017
Location: NCAL
Posts: 442
Received 35 Likes on 34 Posts
biggest issue with N14's is folks that listen to deal and try to run their low-weight oil, in a hot-*** little turbo motor for 10k before changing it.


JCW or 'S' .. its a turbo DI .. love it with oil @ 3-5k interval
 
  #8  
Old 03-23-2019, 09:03 AM
malibujoey's Avatar
malibujoey
malibujoey is offline
4th Gear
Join Date: Nov 2014
Location: Malibu
Posts: 532
Received 2 Likes on 2 Posts
hey ECS where do you find those valve cover numbers???

and do you sell the newer ones for the N14?
 
  #9  
Old 03-25-2019, 05:41 AM
ECSTuning's Avatar
ECSTuning
ECSTuning is online now
Platinum Sponsor
Join Date: Jan 2013
Location: Wadsworth,OH
Posts: 27,710
Received 556 Likes on 536 Posts
Yes,

We have those listed on the product page under Previous Revisions on most products,

For all valve covers, we have the newest revisions.
 
__________________

Have MINI questions? Need MINI answers? Live Chat us! 8:30am to 12:00am Midnight EST
[email protected] | [email protected] | INSTAGRAM | FACEBOOK
Customer Service Hours: 8:00 AM to 8:00 PM EST|Sales Team Hours: 8:00 AM to 11:00 PM | Saturday 10AM to 7PM EST 800.924.5172
  #10  
Old 03-25-2019, 05:51 AM
malibujoey's Avatar
malibujoey
malibujoey is offline
4th Gear
Join Date: Nov 2014
Location: Malibu
Posts: 532
Received 2 Likes on 2 Posts
link?
 
  #11  
Old 03-25-2019, 07:19 AM
ECSTuning's Avatar
ECSTuning
ECSTuning is online now
Platinum Sponsor
Join Date: Jan 2013
Location: Wadsworth,OH
Posts: 27,710
Received 556 Likes on 536 Posts
Sorry here you go

https://www.ecstuning.com/Search/Sit...h/11127646555/

Then click in one more and look under product details at the bottom.

https://www.ecstuning.com/b-genuine-...r/11127646555/
 
__________________

Have MINI questions? Need MINI answers? Live Chat us! 8:30am to 12:00am Midnight EST
[email protected] | [email protected] | INSTAGRAM | FACEBOOK
Customer Service Hours: 8:00 AM to 8:00 PM EST|Sales Team Hours: 8:00 AM to 11:00 PM | Saturday 10AM to 7PM EST 800.924.5172
  #12  
Old 03-26-2019, 10:28 AM
v10climber
v10climber is offline
6th Gear
iTrader: (1)
Join Date: May 2013
Location: FL
Posts: 1,394
Likes: 0
Received 13 Likes on 12 Posts
Even if it's the slightly different JCW motor you're still going to have all the typical things that happen with the N14 motors. Thermostats, water pumps, carbon build-up, vacuum pump, HPFP, etc. Whether or not they're "reliable" is all a matter of perspective. I don't think they're that bad but I do all the work myself and have plenty of other cars to drive if the mini sits in the garage for a week. I've had worse cars but I've also had a lot of better ones.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
odieman23
R56 :: Hatch Talk (2007+)
5
08-18-2016 04:57 AM
orangecrush
R56 :: Hatch Talk (2007+)
56
01-15-2014 12:49 PM
plkdb
Classic Mini Talk
13
12-08-2007 12:55 PM
ImagoX
Classic Mini Talk
10
07-25-2007 01:33 PM
DaveTinNY
1st Gear
10
05-21-2005 05:14 PM


Thread Tools
Search this Thread
Quick Reply: N14 JCW engine, good, bad, or run away!


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: