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5.7L Hemi-Broken Valve Spring - Help

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  #121  
Old 04-01-2010, 03:52 PM
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Sweet! That looks good..
 
  #122  
Old 04-02-2010, 02:13 AM
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If your valve seals were goosed, you would be burning oil.
Typically, this is seen on the "overun" like when you climp up a long hill and have your foot in it. Then when you go down the other side let off the gas. If the seals are damaged, you get plumes of blue smoke. Also you'd have that horrible burning oil smell. You 've probably experienced this, when following an oil burner on the road at some point in your driving career?
Another way to test the seals I learnes from an old hand is, to rev the engine to about 2-2500 rpm for about 5 mins. Then let the engine tick over for about another 5. Then give the engine a rev and watch the exhaust. If there's blue smoke then the seals are goosed.
Hope this helps?
Al.
 
  #123  
Old 04-02-2010, 04:58 AM
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Actually this should be an easy answer as you have just had all the plugs out. Any of them showing oil being burned? Also if you start the engine early in the morning and there is a garage light shining on the exhaust plum you will see a blue tint to the exhaust if it is burning oil.
 
  #124  
Old 04-02-2010, 10:02 AM
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Thanks guys...that's what I thought. Nope, no blue smoke, etc. Also...all plugs looked good except for the #5 cyl, that had the broken spring...had a little oil on it. But that seal was replaced anyway.
 
  #125  
Old 04-04-2010, 02:06 PM
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Question guys....maybe a dumb one but want to make sure. I have the 6.1 exhaust springs and ordered new Manley Pushrods, the Hemi 5.7L 5/16 6.600 intake and 7.825 exhaust. These will be ok correct...meaning I don't need the 6.1 pushrods due to the fact that the valve clearances would not be correct? I saw in someone's sig they had 6.1 exhaust springs and 6.1 pushrods. Thanks
 
  #126  
Old 04-04-2010, 07:36 PM
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16 - 6.1 exhaust springs, 8 - 6.1 intake pushrods, 8 - 6.1 exhaust pushrods
 
  #127  
Old 04-04-2010, 07:56 PM
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Oh man, you've got to be kidding me. Can you explain why as I'm confused. The 6.1 pushrods are longer. Now I'm frustrated!
 

Last edited by FireFighter; 04-04-2010 at 08:05 PM.
  #128  
Old 04-05-2010, 09:48 AM
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Originally Posted by AF_HEMI
16 - 6.1 exhaust springs, 8 - 6.1 intake pushrods, 8 - 6.1 exhaust pushrods
Correct 16 6.1 Exhaust springs is needed the install heights and seat pressure of the 6.1s exhaust spring is perfect for us 5.7 guys with a few upgrades, the 6.1 intake springs has a higher install height due to the longer 6.1 intake valve. If you ordered manley 5.7 pushrods your are OK, the 6.1 push rods are a great CHEAP upgrade to the stocks BUT Im sure the manleys are forged so they will be doing the same thing as the 6.1 pushrods.
 

Last edited by Superchargedram; 04-05-2010 at 09:53 AM.
  #129  
Old 04-05-2010, 03:04 PM
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Originally Posted by Superchargedram
Correct 16 6.1 Exhaust springs is needed the install heights and seat pressure of the 6.1s exhaust spring is perfect for us 5.7 guys with a few upgrades, the 6.1 intake springs has a higher install height due to the longer 6.1 intake valve. If you ordered manley 5.7 pushrods your are OK, the 6.1 push rods are a great CHEAP upgrade to the stocks BUT Im sure the manleys are forged so they will be doing the same thing as the 6.1 pushrods.
Yep, I have 16 exhaust springs here and the 5.7L Manley pushrods already. They're one piece. OK, so from what I am hearing is, I am GOOD to GO with these 5.7 pushrods to be installed when I do the 6.1 exhaust springs.
 
  #130  
Old 04-05-2010, 11:39 PM
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The only reason to change the push rods would be IF the 5.7 rods will not be stiff enough to handle the 6.1 compression tension. The 6.1 push rods MUST be the same length as the 5.7 rods, much longer, you've toasted the engine.

The distant has not changer from the valve seat to the cam if you have not changed the stem length, rockers, cam.

Don't get confused with the diff spring heights when sitting static. The 6.1 spring will compress to the same as the 5.7 when snapped in with the keepers. Now, if one runs their goat hot enough to a white hot temp, there may be a little stem stretch due to little stronger spring.
 

Last edited by oneHEMI57; 04-05-2010 at 11:50 PM.


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