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Discussion Starter · #1 ·
There has been some discussion pertaining to OEM 2009 and prior lifters being suseptable to failure in applications where big HP numbers are developed. The school of thought appears to be that replacing with 2010 or later Cobolt SS lifters, will significantly reduce the possibility of failure. From what I can work out all 2010 and later LFN / Ecotec applications are using these updated lifters.

Questions:

1. Why are they different.
2. What exactly has failed
3. Has anyone ACTUALLY had a failure and if so, what happened
4. Is there an aftermarket solution.

I am upgrading my valve springs to Supertech dual's and this would be a perfect time to upgrade the lifters -- if it is really required.




























producing big HP numbers. The school of thougfht is to replace with OEM lifters from 2010 and later Cobolt SS Ecotec's.
 

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To my knowledge with the Supertech you will not have this problem since they provide Titanium Retainers.
Make sure you get this part number. SPR-TS1012-EC.
They are the dual springs 75# valve springs.
I have been in contact with Supertech and that is the one.
 

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Discussion Starter · #4 ·
I ordered them last week. Should be here ina couple of days. I'm gonna install the springs and the new 2010 Cobolt SS Lash Followers before I start the EFR install. Probobly a couple of weeks before Dave has everything ready to send to me.,
 

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Easiest solution - don't run above stock red line......
 

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Jesel makes/ made aftermarket ones for the L61/LSJ, not sure if LNF are the same though.
 

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Mine failed shifting from 2nd to 3rd @ 7K, unfortunately I hit 1st instead. The eng hit 9K+ the weak stock springs let the valves float. When that happens the "push rod" part sticking out top can get bent over. The stock ones are retained by sheet mental, the newer ones cast. I have pic in my build thread.
 

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That is why the Supertech have Titanium retainers.
 
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