www.the351cforum.com

This is my first 351c build. I have built a couple of SB and BB Chevy's with solid lift cams. Is the principle the same with using feeler gauges to adjust lash?? What about for a hydraulic cam, slight turn of the push rods with your finger and then qtr turn more?

Thanks
Wade

Don't rely on how the pushrods turn. Rely on if there's lash or not.

For a hydraulic camshaft adjustment:

Set your focus on one cylinder, i.e. #1. Rotate the engine over until the #1 exhaust valve starts to open. Adjust the rocker arm adjuster on #1 intake valve until you feel no more axial play (lash) in the pushrod. When you get to that point, add 1/2 turn of preload and lock the polylock down. Rotate engine over until intake valve starts to close. Adjust the rocker arm adjuster on the #1 exhaust valve until you feel no more axial play in the pushrod. Add 1/2 turn of preload and lock it down.

Go to next cylinder.

_________________
Brent Lykins, Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com

Thanks Brent! So solid lift cams would use feeler gauges with the same valve sequence opening\closing?

Wade

Yes, instead of preload, you have lash.

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Brent Lykins, Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com

X2 on the solid lifters. I work for a solid even resistance when pulling out the feeler. When you don't do it a lot, it takes some time and do-overs to get it right.

On the hydros, I use the finger spin and it's worked fine for me over the last 40 years or so. I use a light touch and I can easily tell zero lash. 1/32 of a turn (random choice) is around .001 which with hydros is a whatever in my personal book. But do use the "EOIC" method in any case. (Exhaust Opening - set intake, Intake Closing - set exhaust)

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Chris - Merkel, TX
http://raceabilene.com/kelly/hotrod
"Owner built, owner abused."