Shawn Gilbert
Aug 5th, 07, 9:09 AM
Hey guys,
Even though its a 100 degree's with 98% relative humidity here I started putting her back together.
I reinstalled the cam that had been straightened and reground perfectly by UDHAROLD'S grinder AKA Dacaman. The cam wasnt crazy out but then again I wasnt detecting a LOT of problem with it and would never had pulled it for that reason alone. I phased the cam a little different this time. Everything is going good.
I get the cam in and phased, then clean the lifters and give them a oil soak for a few hours and install. One thing i noticed different with the easy roll is there is absolutely NO play at the roller. I mean None they are much tighter.
I cleaned and installed the push rods then i decided to take my Pro Comp rollers inside ( to cool down a bit ) and check them carefully ( for anything that could cause variation in lash when under load...IE Bearing issues ), I then discovered to my horror that exactly half of them had marks where they had been striking the retainer. :(:(:(:(:clonk:
Now I was like what the >>>> I know i checked that because you can still he the paint I applied to them before I mocked up and rotated the engine by hand then later the starter. I knew i had put a shorter pushrod on the intake side ( more than the normal 1" ) because the travel pattern at the valve tip worked out better. I checked this more than once during the very initial build, however I have not checked it since. There are variables because when i first built the engine, I was using much more lash ( especially cold lash ). The fact I went from .012 cold to .006-.008 cold might have made them touch till it warmed up. I guess RPM could be another factor with deflection coming into play. At any rate a good find making there be just one more reason im glad i tore it down to do the upgrades. The thought of dropping a valve at 7000 RPM in a freshly built BBC make my stomach turn. I used the intakes as a template and clearance all of them ( in case i forget sometime when i take then off in the future ). Some of you that followed my post may remember that I described my valve train as noisy and attributed some of that to the cam out of round, however its just as likely I was hearing this rocker to retainer issue. Its fairly quite in the car and i can hear the engine well. Even though its egg in my face I wanted to share in case it helps anyone. The increased lash issue ( on the intakes ) when opening the exhaust valve seems to be gone and/or reduced as well. I have to clean off the old gaskets and reinstall the intake. I actually forgot that I have a Pro Street 750 Dominator I could use to start the engine and be checking things out. I would already have had it running had i not forgotten this. :D:D
Even though its a 100 degree's with 98% relative humidity here I started putting her back together.
I reinstalled the cam that had been straightened and reground perfectly by UDHAROLD'S grinder AKA Dacaman. The cam wasnt crazy out but then again I wasnt detecting a LOT of problem with it and would never had pulled it for that reason alone. I phased the cam a little different this time. Everything is going good.
I get the cam in and phased, then clean the lifters and give them a oil soak for a few hours and install. One thing i noticed different with the easy roll is there is absolutely NO play at the roller. I mean None they are much tighter.
I cleaned and installed the push rods then i decided to take my Pro Comp rollers inside ( to cool down a bit ) and check them carefully ( for anything that could cause variation in lash when under load...IE Bearing issues ), I then discovered to my horror that exactly half of them had marks where they had been striking the retainer. :(:(:(:(:clonk:
Now I was like what the >>>> I know i checked that because you can still he the paint I applied to them before I mocked up and rotated the engine by hand then later the starter. I knew i had put a shorter pushrod on the intake side ( more than the normal 1" ) because the travel pattern at the valve tip worked out better. I checked this more than once during the very initial build, however I have not checked it since. There are variables because when i first built the engine, I was using much more lash ( especially cold lash ). The fact I went from .012 cold to .006-.008 cold might have made them touch till it warmed up. I guess RPM could be another factor with deflection coming into play. At any rate a good find making there be just one more reason im glad i tore it down to do the upgrades. The thought of dropping a valve at 7000 RPM in a freshly built BBC make my stomach turn. I used the intakes as a template and clearance all of them ( in case i forget sometime when i take then off in the future ). Some of you that followed my post may remember that I described my valve train as noisy and attributed some of that to the cam out of round, however its just as likely I was hearing this rocker to retainer issue. Its fairly quite in the car and i can hear the engine well. Even though its egg in my face I wanted to share in case it helps anyone. The increased lash issue ( on the intakes ) when opening the exhaust valve seems to be gone and/or reduced as well. I have to clean off the old gaskets and reinstall the intake. I actually forgot that I have a Pro Street 750 Dominator I could use to start the engine and be checking things out. I would already have had it running had i not forgotten this. :D:D