Compression tests at cylinders....

1. Jimmy-Boy Saxperience Post Whore Joined: Jul 2006 Suffolk Posts: 7551 N/A 200bhp+ per ton 106 gti

   #1 15th March 2013, 12:27

   Hi just had my head rebuilt and skimmed (car running ph3s, jenvys and omex 600 ecu)
   
   my readings were 8bar 8bar 8bar and 14bar is this normal ? :/
   
   the car runs sweet however.
   
   
2. Gabbastard Saxperience Post Whore Joined: Dec 2002 United Kingdom Posts: 8390

   #2 15th March 2013, 13:11

   No,all cylinders should be within 1bar of each other.
   
   How was the test for repeatability?
3. jones91 Established Member Joined: Jun 2011 Bridgnorth (Shropshire) Posts: 2001 Jdm Dc2 Integra

   #3 15th March 2013, 14:30

   As above, all cylinders should be roughly the same reading, by the looks of it, you either have knackered valves, worn piston rings or your compression test reader is faulty
4. yr51ocw Frequent Poster Joined: Oct 2005 Posts: 751

   #4 15th March 2013, 15:12

   out of that, only cylinder 14 looks healthy. Have you have a leakage check done?
5. Alfie09 Frequent Poster Joined: Feb 2013 Posts: 579

   #5 15th March 2013, 18:02

   Quote:

   Originally Posted by yr51ocw out of that, only cylinder 14 looks healthy. Have you have a leakage check done?

   Not really
   
   They say the levels being even is what you want
6. blackie_2k5 Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B

   #6 15th March 2013, 19:00

   Yes but anything under 10 bar is low compression, really low
7. user_4681 Saxperience Post Whore Joined: Dec 2004 Grimsby United Kingdom (England) Posts: 5489 SUPERCHARGED saxo vts

   #7 15th March 2013, 19:04

   For reference iirc my old engine with 708cams was 15bar, lowest was 14,8 or something.
8. yr51ocw Frequent Poster Joined: Oct 2005 Posts: 751

   #8 15th March 2013, 19:29

   Quote:

   Originally Posted by Alfie09 Not really They say the levels being even is what you want

   Agreed, if it were a low static compression with lots of overlap, but this isnt. Hence there is something wrong with cylinders 1,2 & 3 which requires some more attention.
   
   Please dont offer advice if what you are offering is poor advice.
9. blackie_2k5 Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B

   #9 15th March 2013, 20:06

   Who did the work mate?
   
   And did you test all cylinders the same? Eg all throttle open, or all throttle closed? Not mixed?
10. Jimmy-Boy Saxperience Post Whore Joined: Jul 2006 Suffolk Posts: 7551 N/A 200bhp+ per ton 106 gti

    #10 16th March 2013, 08:11

    i thought readings are bad, it's one of my mates that has been working on cars for about 10years and definatly one of the best in my area so i know thats not the problem. ATspeed did the work before hand taking head off etc but never did headskim and gasket and it had a bad seal, so when oil got hot on track it seaped out the head. Hense changing it, i can't say i would reccomend ATspeed though after seeing the lack of attention to detail when shelling big £££
    
    Will find out above info and message back.