help with adjusting valves with AFO cam - Chevy and GMC Duramax Diesel Forum
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post #1 of 6 (permalink) Old 11-23-2019, 02:15 PM Thread Starter
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help with adjusting valves with AFO cam

Need help adjusting my valves, I have an AFO cam and the firing order is different. I was following the tradition firing order and having issues, until it dawned on me. The AFO cam firing order is 1-5-6-3-4-2-7-8



When cylinder 1 is TDC I can adjust cylinder x,y, and z intake exhaust valves, and so forth. that's the help i need, i cant find any info. Thanks

2012 GMC Sierra 2500HD Denali
Fass 150, CP3, Up pipe, Down pipe, EZ lynk w/ 5 tunes SOTF, Magnaflow exhaust, PCV re-route, 4 inch Fabtech lift, 35in tires
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post #2 of 6 (permalink) Old 11-23-2019, 04:34 PM Thread Starter
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figured it out:

Rotate the engine and adjust one cylinder at a time.
When the exhaust valves just begin to open, adjust the intake.
When the intake valves are just past maximum lift, adjust the exhaust.

2012 GMC Sierra 2500HD Denali
Fass 150, CP3, Up pipe, Down pipe, EZ lynk w/ 5 tunes SOTF, Magnaflow exhaust, PCV re-route, 4 inch Fabtech lift, 35in tires
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post #3 of 6 (permalink) Old 11-24-2019, 12:09 AM
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Quote:
Originally Posted by mstein86 View Post
figured it out:


When the intake valves are just past maximum lift, adjust the exhaust.
When the intake just closes, adjust the exhaust.
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post #4 of 6 (permalink) Old 11-24-2019, 09:26 AM Thread Starter
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Quote:
Originally Posted by AlisoBob View Post
When the intake just closes, adjust the exhaust.
Both ways work, right? Are you saying I need to redo my exhaust valve lash?

2012 GMC Sierra 2500HD Denali
Fass 150, CP3, Up pipe, Down pipe, EZ lynk w/ 5 tunes SOTF, Magnaflow exhaust, PCV re-route, 4 inch Fabtech lift, 35in tires
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post #5 of 6 (permalink) Old 11-25-2019, 07:36 PM Thread Starter
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Bump...

2012 GMC Sierra 2500HD Denali
Fass 150, CP3, Up pipe, Down pipe, EZ lynk w/ 5 tunes SOTF, Magnaflow exhaust, PCV re-route, 4 inch Fabtech lift, 35in tires
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post #6 of 6 (permalink) Old 11-25-2019, 08:28 PM
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Quote:
Originally Posted by mstein86 View Post
Both ways work, right? Are you saying I need to redo my exhaust valve lash?
Yes
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