[crowncourier]

Just had a valve seat put in at the machine shop, they went ahead and cleaned up the other valves and seats. I installed them, gapped .005 intake .013 in exhaust. Runs a little funny when I first start it up.... Smooth then it breaks up a little, then smooth. Begins to run real smooth after its warms up. What is the proper way to break them in? And for how long?

 

[boomers_influence]

jay
did you set the valves with the piston
at TDC of the compression stroke?
thank you boomer

 

[crowncourier]

Yep

 

[Hammerdown-7]

Hello Jay
It should Not be running rough in any stage of the engine running. I would re-set the valve lash it is Far better to leave them a Little Loose than Too Tight. A Loose Valve gap setting will gain you More Power than One set Too Tight. Regards, Kurt

 

[akaothermick]

give it a compression test, that will tell if a valve is sticking open or not seating, but this might be a other minor issue not related to valves.