Lifter Damage
01-30-2011, 09:24 PM
#41
Drop these in and forget about them http://www.atlanticspeed.com/product...ry=244#details Gm really dropped the ball on this, they should have used their older design.
01-30-2011, 09:39 PM
#42
Drop these in and forget about them http://www.atlanticspeed.com/product...ry=244#details Gm really dropped the ball on this, they should have used their older design.
01-31-2011, 07:19 PM
#55
Like I said before check with comp and check into regrinding it back to health or something a little different (not much) They won't change ICL or LSA, but can sometimes regrind it(depending on base circle, etc). Did one for a friend and it's still running well today 3 hard years later. Just have to ask for someone with a clue 
I can't remember who I spoke to, but he new what he was talking about and was easy to deal with.
I can't remember who I spoke to, but he new what he was talking about and was easy to deal with.
01-31-2011, 08:56 PM
#56
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Like I said before check with comp and check into regrinding it back to health or something a little different (not much) They won't change ICL or LSA, but can sometimes regrind it(depending on base circle, etc). Did one for a friend and it's still running well today 3 hard years later. Just have to ask for someone with a clue I can't remember who I spoke to, but he new what he was talking about and was easy to deal with.
I can't remember who I spoke to, but he new what he was talking about and was easy to deal with.
02-01-2011, 01:24 AM
#59
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Check your bearings! Same thing happened to me from bad valvetrain setup.
Bearings were damaged as well as some piston skirts.. expensive!
Spend some time setting it up right next time
Use loads of ZDDP in your oil as well as a heavier weight oil etc.
Bearings were damaged as well as some piston skirts.. expensive!
Spend some time setting it up right next time
Use loads of ZDDP in your oil as well as a heavier weight oil etc.
02-01-2011, 11:14 PM
#60
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Wow!!! Ya you caught something in time there man.
A few things before I start. Does the last picture on your first post show signs of heat in the lifter, and do the wheels on the lifters turn freely on any of them or not. And why did you pull the heads to start with? When did this happen like you started it and it sounded terrible or you just left the tuner who uped your limiter and you were making highway pulls...
Ok I'm going to speculate a little here but it will be something to think about. To me it looks like, the wheel on the lifter was draging across the lobe before it turned because of the width of the path on the lobe. When it drags it means something was wrong with the wheel/axel. Either dirt or heat can do it or age and the lobe ramps on that cam bent the axel locking the wheel because they reused lifters the way it looks by mix matching.
So when the wheel locked it dragged across the lobe. eventually the harmonics beat the spring dead letting it come off the lobe and turning in the bore. If I were you I would look into the other lifters and that one for signs of excessive heat and please check your springs. Also if the springs weren't strong enough to start it could have been the problem too. Also wouldn't hurt to look into oiling system, make sure everything is open and oiling the way it should.
Finally pull the pan and check the bearings. You just don't want to tear everything down and have something else happen. Reassurance.
O and please don't regrind the cam. I know your cousins boyfriends best friend did it and it is just fine. Ok but they do coat cams for hardness on the lobes, regrinding can take this off, eventually flattening the lobe, its not as important on a roller but with crazy lobes you really need to think about it. And recoating costs almost the price of a cam.
So check the bearings, get a new cam, lifters, springs, check the valves and guides, and you should be good. Probably to in depth but you gotta know what caused this to avoid it happening again.
Keep us posted. Curious to see what happened.
A few things before I start. Does the last picture on your first post show signs of heat in the lifter, and do the wheels on the lifters turn freely on any of them or not. And why did you pull the heads to start with? When did this happen like you started it and it sounded terrible or you just left the tuner who uped your limiter and you were making highway pulls...
Ok I'm going to speculate a little here but it will be something to think about. To me it looks like, the wheel on the lifter was draging across the lobe before it turned because of the width of the path on the lobe. When it drags it means something was wrong with the wheel/axel. Either dirt or heat can do it or age and the lobe ramps on that cam bent the axel locking the wheel because they reused lifters the way it looks by mix matching.
So when the wheel locked it dragged across the lobe. eventually the harmonics beat the spring dead letting it come off the lobe and turning in the bore. If I were you I would look into the other lifters and that one for signs of excessive heat and please check your springs. Also if the springs weren't strong enough to start it could have been the problem too. Also wouldn't hurt to look into oiling system, make sure everything is open and oiling the way it should.
Finally pull the pan and check the bearings. You just don't want to tear everything down and have something else happen. Reassurance.
O and please don't regrind the cam. I know your cousins boyfriends best friend did it and it is just fine. Ok but they do coat cams for hardness on the lobes, regrinding can take this off, eventually flattening the lobe, its not as important on a roller but with crazy lobes you really need to think about it. And recoating costs almost the price of a cam.
So check the bearings, get a new cam, lifters, springs, check the valves and guides, and you should be good. Probably to in depth but you gotta know what caused this to avoid it happening again.
Keep us posted. Curious to see what happened.