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| Valve Lash https://slantsix.org/forum/viewtopic.php?t=65125 |
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| Author: | Bob_A [ Fri Jul 17, 2020 11:52 pm ] |
| Post subject: | Valve Lash |
I’ve installed a cam, and D.D.’s book shows .010 intake, and .020 exhaust. The cam card, however, shows .010 and .012 SO, which should I go with? |
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| Author: | slantzilla [ Sat Jul 18, 2020 1:55 am ] |
| Post subject: | Re: Valve Lash |
Cam card. |
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| Author: | Doctor Dodge [ Mon Jul 20, 2020 9:44 am ] |
| Post subject: | Re: Valve Lash |
010 & .020 are factory cam lash specs. but other cam profiles can have different lash settings. What cam do you have? DD |
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| Author: | Bob_A [ Mon Jul 20, 2020 3:36 pm ] |
| Post subject: | Re: Valve Lash |
It’s a Comp Cams .220/.220 |
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| Author: | DusterIdiot [ Mon Jul 20, 2020 6:05 pm ] |
| Post subject: | D |
D |
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| Author: | Bob_A [ Mon Jul 20, 2020 7:16 pm ] |
| Post subject: | Re: Valve Lash |
And doing it cold,with new valve train I figured to add .001 to get it decent for startup and break in. Surely it will tighten up a bit when hot, and loosen a bit when everything seats. Then supposed to start right away and run at 2000rpm for a half hour..THAT will be hard for me, it’s “against my nature”.. |
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| Author: | Doctor Dodge [ Tue Jul 21, 2020 12:00 pm ] |
| Post subject: | Re: Valve Lash |
Vote # 2 that that Comp grind will likely run better with looser lash. Me,... I would start with .012 In / .016 Ex static adjustment (EOIC method) to start the engine. Run the engine between 1000 and 1800 RPM,. (seeing that the SL6 cam is sitting right next to the crankshaft, it will get lots of oil "splash") Be sure all the push rods are spinning and check / tighten any loud ticking valves. Stabilize the engine and then bring down the RPMs and do a hot & running lash adjustment. See how loose you can go on the lash, before getting a ticking sound.. I often run Comp Cams with .016 lash clearance on the exhaust valves DD. |
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