compresion problem? |
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compresion problem? |
dirk9141973 |
Aug 16 2012, 03:41 PM
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#1
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Unregistered |
Working on engine start up after rebuild (2056) and maybe have 10 minutes run time. (No load still on jack stands) Noticed that something was out not much compression through cylinder #2. Shut it down no bad sounds or smoke everthing turns over smoth. compresson test # 1 120 # 2 65 # 3 118 # 4 120 Can the valve settings be so far off to get low compression? What should I try ??
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benalishhero |
Aug 16 2012, 04:17 PM
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#2
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Member Group: Members Posts: 313 Joined: 28-November 07 From: Portland, Maine Member No.: 8,384 Region Association: North East States |
Yes improper valve adjustment can cause improper compression. Don't burn a valve.....
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timothy_nd28 |
Aug 16 2012, 05:26 PM
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#3
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest |
A silly question, are the piston rings for #2 staggered?
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brant |
Aug 16 2012, 05:44 PM
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#4
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914 Wizard Group: Members Posts: 11,632 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
adjust the valves cold and retest...
it could be possible to break a ring during install ? |
VaccaRabite |
Aug 16 2012, 06:45 PM
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#5
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En Garde! Group: Admin Posts: 13,456 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
Check valves first.
If that does not bring it up, do a leakdown test and listen to where the air is escaping. Zach |
benalishhero |
Aug 16 2012, 06:49 PM
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#6
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Member Group: Members Posts: 313 Joined: 28-November 07 From: Portland, Maine Member No.: 8,384 Region Association: North East States |
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dirk9141973 |
Aug 18 2012, 12:04 PM
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#7
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Unregistered |
Well good news no burnt valves but valve train was a mess !! All fixable ! 2 studs nuts were in valve cover 2 were striped out but not in head the hold down blocks. Removed all (8) studs and replaces with new HD larger studs they came with cam kit. I think the problem valves toooo tight and new HD valve springs? Has anyone had this problem?
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