trunion upgrade proplem
???? did you measure pushrod length or did Pat G suggest 7.350. I have ls7 lifters and 243 heads milled to 62cc and Pat said I use the 7.4 pushrods, not sure about 317 though. Keep us posted
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Turd Gen Guy
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From: andalusia, alabama
The 317's are milled to a 64cc chamber so I have no idea what pushrod I need honestly. And I have stock .051 head gaskets
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From: Turnin' Wrenches Infractions: 005
You're question about camshafts , the larger the lift the smaller the base circle . The stock 5.3 cams base circles are 1.483" and the lifts are .455 and .468 where as the LS2 and LS6 2002+ base circles are 1.519" with lifts of .521 or .525 . They have to do it this way because if they just kept increasing the lobe sizes the lobes would not fit through the bearings .
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Turd Gen Guy
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From: andalusia, alabama
After reading about pushrod length I remembered while tightening down my rockers I go about 1 full turn past zero lash before it hits the 22lb mark. I read its suppost to be 1.25-1.75 turns past for proper preload on ls7 lifters... Could too short a pushrod cause this noise im hearing?
Last edited by 1nasty86; Feb 19, 2011 at 11:28 AM.
this may not pertain to anything, but my work truck starting tapping. 150K on the clock, it was making a HELL of a noise. for sure on driver side. pulled head, replaced lifters..... noise went away. noise comes and goes, so i pull pass side head and replace lifters. noise still comes and goes. rattles for about 5 minutes once a day. ususally starts when under a load, then dissapears. im starting to think ive got a rocker going south, even though i inspected them when i had the heads off and they appeared fine.
OR ive got a cracked flexplate.
something to think about with your random noise.
OR ive got a cracked flexplate.
something to think about with your random noise.
Thread Starter
Turd Gen Guy
iTrader: (63)
Joined: Dec 2008
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From: andalusia, alabama
this may not pertain to anything, but my work truck starting tapping. 150K on the clock, it was making a HELL of a noise. for sure on driver side. pulled head, replaced lifters..... noise went away. noise comes and goes, so i pull pass side head and replace lifters. noise still comes and goes. rattles for about 5 minutes once a day. ususally starts when under a load, then dissapears. im starting to think ive got a rocker going south, even though i inspected them when i had the heads off and they appeared fine.
OR ive got a cracked flexplate.
something to think about with your random noise.
OR ive got a cracked flexplate.
something to think about with your random noise.
Thread Starter
Turd Gen Guy
iTrader: (63)
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From: andalusia, alabama
using the pushrod length checker i put it at what roughly 7.375 and torqued it down... took 1.25 turns put it at 7.400 and took 1.75 turns. so what pushrod should i get?
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Thread Starter
Turd Gen Guy
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From: andalusia, alabama
Fingers are too fat lol. From what ive read/seen/figured im going to need the 7.375 pushroda to get me in the right area. But I wouldnt think the .025 difference would cause my noise. Only time will tell.
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Turd Gen Guy
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From: andalusia, alabama
Also used the pushrod length checker and came up with 10 turns. So add .080 for preload and I come up with 7.380 so I do need the 7.375 pushrods. But still could this have been my noise?
Thread Starter
Turd Gen Guy
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From: andalusia, alabama
I should be at .75 with my new pushrods. Most likely was at .50 before. Maybe my noise was comming from this.... But who knows. I remembered this morning that I also changed the converter close to the rocker upgrade... Ill be looking for backed out bolts also. But if I recall lock tite was applied to all 3 bolts.
Last edited by 1nasty86; Feb 21, 2011 at 08:41 AM.
