Stock Problems/Issues Discussions related to warranty related issues and repairs, or other problems with the OEM parts and software for MINI Cooper (R50), Cabrio (R52), and Cooper S (R53) MINIs.
Sponsored by:
Sponsored by:

Questions on Comp. & Leakdown Test

  #1  
Old 12-09-2011, 08:32 AM
NC TRACKRAT's Avatar
NC TRACKRAT
NC TRACKRAT is offline
6th Gear
Thread Starter
iTrader: (5)
Join Date: May 2006
Posts: 1,130
Likes: 0
Received 25 Likes on 23 Posts
Questions on Comp. & Leakdown Test

Want to do a compression & leakdown test on MCS. I know how to perform the comp. test and have a leakdown tester. Do I have to remove the valve cover to determine TDC on comp. stroke or is there an easier way like dowel rod down the plug hole? BTW, will running the comp. test throw a code? If so, will I be able to clear it with my Peake tool after re-installing all the plugs? (If this were a 289 HiPo, I wouldn't need any help!)
TIA!
 
  #2  
Old 12-09-2011, 12:27 PM
ED955S's Avatar
ED955S
ED955S is offline
5th Gear
iTrader: (1)
Join Date: May 2007
Posts: 943
Likes: 0
Received 1 Like on 1 Post
Remove all the plugs to lessen the pressure when you crank the motor (8-10 rounds). Start plug 1 to 4. To the lowest reading, I squirted a light motor oil, crank 4 rounds to distribute oil, then put in the compression gauge to get another reading. I'd just hold the pressure and see how fast and how much it drops or holds. It did not throw codes.
 
  #3  
Old 12-09-2011, 12:45 PM
NC TRACKRAT's Avatar
NC TRACKRAT
NC TRACKRAT is offline
6th Gear
Thread Starter
iTrader: (5)
Join Date: May 2006
Posts: 1,130
Likes: 0
Received 25 Likes on 23 Posts
Thanks! Good to know about the codes. Bentley manual warned that it might throw one. Now, need to find EZ way to get TDC for leakdown test.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Helix13mini
Drivetrain (Cooper S)
16
10-26-2018 05:50 PM
Alkaidovich
Interior/Exterior
59
03-10-2018 04:43 PM
Philipangoo
JCW Garage
23
09-16-2015 11:54 AM
W0TM8
General MINI Talk
11
08-16-2015 12:32 AM
ECSTuning
Vendor Announcements
0
08-12-2015 01:24 PM


Thread Tools
Search this Thread
Quick Reply: Questions on Comp. & Leakdown Test


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.