Valve Timing Questions
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Joined: Jul 2012
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Roll the pushrod across a sheet of glass. If it wobbles, it's bent.
Stock cam height may indeed be non-interference, but that's only .432" lift on a 5.2L with the stock pistons .050" in the hole, I believe. The 5.9L gets significantly more clearance due to the dished piston, and only a .418" lift on the stock cam.
I never actually measured the depth of the combustion chamber on my heads, but my gut says it's pretty close to touching in the stock configuration at the two extremes. Add a performance cam, and it could easily go over.
Did you use that JP Performance set? The crank sprocket is double marked for clarity, the 0 on the outside circle should face straight up to the cam sprocket mark, the 0 on the inner circle is for the crank key way. I'm wondering if you transposed those somehow.
Stock cam height may indeed be non-interference, but that's only .432" lift on a 5.2L with the stock pistons .050" in the hole, I believe. The 5.9L gets significantly more clearance due to the dished piston, and only a .418" lift on the stock cam.
I never actually measured the depth of the combustion chamber on my heads, but my gut says it's pretty close to touching in the stock configuration at the two extremes. Add a performance cam, and it could easily go over.
Did you use that JP Performance set? The crank sprocket is double marked for clarity, the 0 on the outside circle should face straight up to the cam sprocket mark, the 0 on the inner circle is for the crank key way. I'm wondering if you transposed those somehow.
Retired Moderator - RIP
Joined: May 2008
Posts: 18,729
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From: NH
Don't know, maybe these links will help.
http://www.bionicdodge.com/Download/...uel%20Sync.pdf
http://www.moparchat.com/forums/showthread.php?t=96310
http://www.bionicdodge.com/Download/...uel%20Sync.pdf
http://www.moparchat.com/forums/showthread.php?t=96310
Champion
Joined: Oct 2009
Posts: 4,717
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From: N/A
Yes sir, I sure did use that set. I may have read it wrong, but I got it to where the outside 0 on the crank sprocket is facing straight up at 12 and the cam gear is doing the same. #1 is at TDC compression. Is that right? 10 of the 16 pushrods were indeed bent. Would me having a higher than stock spring rate be too much for my stock pushrods?