heads off, check my next steps.
heads off, check my next steps. I'll clean the deck and bolt holes out thoroughly tomorrow, after that I'm kinda stumped.
I'm running factory replacement head gaskets and don't have them yet, I know I can check p t v without them and just add the difference but what about p r length? I'm kind of lost on what order this needs to be done..
I'm running factory replacement head gaskets and don't have them yet, I know I can check p t v without them and just add the difference but what about p r length? I'm kind of lost on what order this needs to be done..
I've got one on the way. Don't I need the gaskets installed first though to get correct p r length?? If I bolt my heads on with gaskets to check length, don't I then run the risk of ruining the gaskets?
Launching!
Joined: May 2012
Posts: 209
Likes: 1
From: NC
PTV clearance involves valve events in relation to crankshaft rotation. There are many variables involved that would have to be taken into effect to calculate it without using the heads. I am a fan of the clay method which requires actually using the heads and not guessing based on calculations of compressed head gasket depth.
A pushrod checker is best done with the heads on the motor as it involves valvetrain geometry as a whole including RR ratio, deck height, compressed gasket depth, etc.
Chase the holes, degrease the block, paint it if you would like, remove any carbon buildup, check freeze plugs, etc. - Basically give it a good one over and you're good.
A pushrod checker is best done with the heads on the motor as it involves valvetrain geometry as a whole including RR ratio, deck height, compressed gasket depth, etc.
Chase the holes, degrease the block, paint it if you would like, remove any carbon buildup, check freeze plugs, etc. - Basically give it a good one over and you're good.
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I've never done this myself, but if the stock LS1 piston comes out of the block 0.006", wouldn't installing the heads without a gasket cause the piston to contact the quench area of the chamber? I'm just speculating, but I'd also like to know since I'll be measuring PR length soon myself.
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Verdad Gallardo I appreciate everyones replies, but i know how to do the next few steps, I'm just asking if i need gaskets on before checking length of p r's and if i need the proper push rods installed before checking p t v??
I am wondering the same thing how can you check ptv without the correct size pushrods.Basically which one do you measure first is what he is asking.Step by step.
Exactly. I understand how everything works, I talked to t s p today and they told me to check clearance first and once I'm good, bolt the heads down and check p r length. But, if the push rods are to long, will that not effect my measurements on clearance??
Launching!
Joined: May 2012
Posts: 209
Likes: 1
From: NC
Depends on came phase/installed ICL, your RR, and intended RPM range. The smaller the RR the less the distance is multiplied to the valve stem. Realistically you can get by with 0.035 - 0.050 quench as the ideal distance but i usually recommend adding another .020 for RPM ranges higher than 6500 to allow for stretch. If you're within these ranges for your application i doubt you will have any problems when correcting valvetrain geometry. No need in overcomplicating a simple setup procedure - just know metal on metal supersedes PTV clearance - in reality metal on metal contact supersedes just about anything in a motor build.
Everyone on here sounds like a scientist! 
is there a simple answer to the question without going into motor building 101?? If p r length is too long, will it effect ptv clearance?? If so, what needs to be done before hand to do it correctly? Thanks for responses guys! Not being a dick but I just don't understand the fancy talk..
is there a simple answer to the question without going into motor building 101?? If p r length is too long, will it effect ptv clearance?? If so, what needs to be done before hand to do it correctly? Thanks for responses guys! Not being a dick but I just don't understand the fancy talk.. 
Put the head on with the gasket and just snug it up handy. Get some machinist die and put it on the valve and then install a pushrod and rocker arm. Turn the engine over a few time and then take rocker off to see where the wear pattern is and adjust from there.
Thanks buddy, thats list for rocker and pr length. What about checking p t v though. What push rods do you use? Will longer ones not make the ptv different once I change to my new ones? Big difference between factory heads and 243s milled to 59cc.
For those who were watching this thread, I finally answered my own question. You will need to find your correct length with the adjustable push rod and then check your clearance on that cylinder. Simple as that.. 
