Over-Rev Question?
12-20-2004, 05:07 PM
#21
Originally Posted by Chazmo,Dec 20 2004, 06:45 PM
Thanks for posting the picture and commentary, guys. Just for my edification, which of the two valves in the picture is not being retained properly? Is it the protruding one or the one that's flush?
Good stuff, guys. You learn something new every day.
Good stuff, guys. You learn something new every day.
12-20-2004, 06:32 PM
#22
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Originally Posted by xviper,Dec 20 2004, 10:07 PM
the spring is "riding up". I think this is better wording than the valve "dropping down", since the valve doesn't really go anywhere till the retainer breaks.
Just to clarify...When checking for retainers that have walked up because of cracking, all 16 valves can EASILY be seen with a dentist mirror and a LED penlight. Even the slightest crack will send the retainer higher up on the keepers. All you need to focus on is the height that the keepers sit in the retainer. From my experience, #4 cylinder retainer are always the first, if not the only broken ones in the engine (someone explain that one
). If you're slick, you can see these with the mirror and light through the oil cap hole, without even pulling the valve cover. Bigsalqt is comin out Thursday, we'll post some pics if we find anything good (meaning bad )
12-20-2004, 07:07 PM
#23
Originally Posted by billman250,Dec 20 2004, 08:32 PM
From my experience, #4 cylinder retainer are always the first, if not the only broken ones in the engine (someone explain that one ).
).
OK, I'll bite.Is it because #4 is the farthest away from the cooler coolant? By the time the coolant gets back there, it's the hottest it gets. Perhaps the #4 cylinder cooling jacket is always the hottest of all of them. Maybe that's why the temp sensor is located back there - to register the "worse case scenario"?
12-20-2004, 09:03 PM
#24
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Originally Posted by billman250,Dec 20 2004, 07:32 PM
Exactly
Just to clarify...When checking for retainers that have walked up because of cracking, all 16 valves can EASILY be seen with a dentist mirror and a LED penlight. Even the slightest crack will send the retainer higher up on the keepers. All you need to focus on is the height that the keepers sit in the retainer. From my experience, #4 cylinder retainer are always the first, if not the only broken ones in the engine (someone explain that one ). If you're slick, you can see these with the mirror and light through the oil cap hole, without even pulling the valve cover. Bigsalqt is comin out Thursday, we'll post some pics if we find anything good (meaning bad )
Just to clarify...When checking for retainers that have walked up because of cracking, all 16 valves can EASILY be seen with a dentist mirror and a LED penlight. Even the slightest crack will send the retainer higher up on the keepers. All you need to focus on is the height that the keepers sit in the retainer. From my experience, #4 cylinder retainer are always the first, if not the only broken ones in the engine (someone explain that one
). If you're slick, you can see these with the mirror and light through the oil cap hole, without even pulling the valve cover. Bigsalqt is comin out Thursday, we'll post some pics if we find anything good (meaning bad )
12-20-2004, 09:37 PM
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Originally Posted by krazik,Dec 20 2004, 10:24 PM
you didn't over rev tho. its not possible.
If you did it at 80mph ok....
If you did it at 80mph ok....
12-21-2004, 06:19 PM
#27
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Originally Posted by xviper,Dec 21 2004, 12:07 AM
Is this a pop quiz? OK, I'll bite.
Is it because #4 is the farthest away from the cooler coolant? By the time the coolant gets back there, it's the hottest it gets. Perhaps the #4 cylinder cooling jacket is always the hottest of all of them. Maybe that's why the temp sensor is located back there - to register the "worse case scenario"?
OK, I'll bite.Is it because #4 is the farthest away from the cooler coolant? By the time the coolant gets back there, it's the hottest it gets. Perhaps the #4 cylinder cooling jacket is always the hottest of all of them. Maybe that's why the temp sensor is located back there - to register the "worse case scenario"?
Your guess is as good as mine bro (actually it's better because I haven't guessed) But it has been the case, 100% of the time.....mystery to me....
