@@lamont814 Iron block uses a little less preload due to less expansion compared to aluminum. There is a chart for Morel lifters somewhere if you search google but its best to check with the manufacturer.
Recently bought a ctsv and had a question on valve lash settings bc I can’t find what the spec is from previous owner, it’s a solid roller setup on hand ported heads still an iron block stroked to a 418ci, .709 lift Comp cams, 1.8 rockers, PAC springs good for 750 lift, titanium keepers, and don’t know the push rods setup. That’s all I know but have no idea where to start with lash and need some guidance.
Would have been helpful if you guys stated that the 0.070 preload is for the LS engine you were working on. In fact, not all LS engines spec 0.070 and it depends on the lifter manufacturer really if not OEM.
I'm not sure where you are getting this information, but we did a study on the issue and made a suggestion to the public available in 2012. www.corvetteforum.com/forums/c6-corvette-zr1-and-z06/3023469-katech-psa-ls7-ls9-cylinder-heads-valve-guides-valves-and-rocker-arms.html?highlight=katech+valve+guide+psa
Finally!!!! Agood sensible video on ls preload!!! Yayyy!!!
Should have mentioned that preload will vary depending on lifter specs per manufacturer and also wether aluminum or iron block...
@@lamont814 Iron block uses a little less preload due to less expansion compared to aluminum. There is a chart for Morel lifters somewhere if you search google but its best to check with the manufacturer.
That push rod measuring device is nice. I don’t hardy trust the old comp tool. Fair amount of play in the threads on it
Use teflon tape to remove play 👍👍
So for proper preload you will end up with different length pushrods?
Recently bought a ctsv and had a question on valve lash settings bc I can’t find what the spec is from previous owner, it’s a solid roller setup on hand ported heads still an iron block stroked to a 418ci, .709 lift Comp cams, 1.8 rockers,
PAC springs good for 750 lift, titanium keepers, and don’t know the push rods setup. That’s all I know but have no idea where to start with lash and need some guidance.
Would have been helpful if you guys stated that the 0.070 preload is for the LS engine you were working on. In fact, not all LS engines spec 0.070 and it depends on the lifter manufacturer really if not OEM.
How tight of preload are u setting? I have an LS1 and honestly keep getting different results
Does it matter ford or.chevy? Roller lifter or just a plain hydraulic lifter?
Just wondering, what adjustable pushrod tool is that.
It was made by Jesel.
So, you're saying .070 pre-load across the board - all engines? I'm calling BS on this bit. That could be a costly assumption.
You are correct bud, the 0.070 is an LS preload. Most non LS engines are 0.020 to 0.060 preload.
Would .070 be good preload for 454 BBC? Or .050 be enough? Thanks
Depends on the lifter and what they call for
dude on the left needs to smile once and in while
Do you have to check every one? Im thinking that is a yes.
Usually just one intake and one exhaust
@@KatechPerformance per bank? or per engine?
@@jasonbeaulieu4979 Per engine is typically fine, unless you suspect one cylinder head is decked more than another.
I hope you guys are not the same katech that knew that the ls7 exhaust valve loves drop and didn't tell anyone
I'm not sure where you are getting this information, but we did a study on the issue and made a suggestion to the public available in 2012. www.corvetteforum.com/forums/c6-corvette-zr1-and-z06/3023469-katech-psa-ls7-ls9-cylinder-heads-valve-guides-valves-and-rocker-arms.html?highlight=katech+valve+guide+psa
GM did that, not katech