Big Block Chevy Roller Rocker adjustment. Overview of valvetrain, rockers and rocker adjustment.

In this video we talk about how to convert a Gen VI 454 Big Block Chevy to an adjustable roller rocker, and talk about pushrods, guideplates, rocker studs, roller rockers and how to properly adjust the rockers for perfect hydraulic lifter preload.

[@MagaRickn]

Thank you for your video! I'm 73 and building my 427 for the last time, I hope. ;) My Son has convinced me to go with a roller kit, instead of what came on this 1969 model 427. Hope I can afford it, cause it looks 'spensive!! ;) Good explanation. Helps me understand. I've built engines, just nothing with this type of roller kit. :)

[@MagaRickn]

I am surprised that there is not a suggested torque spec on the set screws. ??

[@vikingmech]

@MagaRickn There seems to be a lifter failure epidemic going on right now, especially with flat-tappet lifters so I would definitely go roller if you can. Even those are a gamble so make sure to test them all once you get them.

[@vikingmech]

@MagaRickn There was no torque spec provided by the manufacturer on those, but I think most people just snug them tight.

[@jeremydeaderick1324]

98-2000 gen 6 454 s use 3/8 pushrods and guide plates . The earlier gen 6 s used 5/16

[@marlonlove8254]

Best explanation I’ve seen so far! Definitely following this build. Great content!

[@vikingmech]

@marlonlove8254 Thanks! I try to fill in some details that I don't see in other videos. Thanks for watching!

[@leonardfoster6252]

I didn't see you lube the rocker trunions be or the rocker roller tips before installing them...

[@vikingmech]

@leonardfoster6252 I'll be pre-lubing the whole engine before the first firing. I'll make another video showing that.

[@leonardfoster6252]

.020" pre load on the lifter or as much as .050" for street...

[@joe-hp4nk]

All bbc's use 7/16 rocker studs from the factory.

[@vikingmech]

@joe-hp4nk Gen V and VI have 3/8 base threads. You can get a conversion stud kit like this (Jegs part# 809-12368941) or (Summit# CCA-4514-1) that has a 3/8 base thread and a 7/16 shaft for adjustable rockers. Or you can have the base threads drilled and tapped to 7/16 like I did for a full 7/16 stud.

[@joe-hp4nk]

Sorry, I only worked with the gen IV bbc@@vikingmech

[@leonardfoster6252]

You can set all valves starting at TDC on number 1 and turn crank every 45° to set next valves in the firing order, 18436542 unless you have a 4&7 swap18736542...