Hello everyone, I have a 2000 civic D16Y8 automatic just recently did head gasket Buy a aftermarket head set valve int .020 exhaust.025 going by the sticker on the hood on certain sites it says .008 for intake and .010 on exhaust What do you guys run on valve clearance? Reset timing on middle mark replaced idle air control valve runs great during the day just has trouble in the morning. It doesn’t like to start up right away. Takes like three times any suggestions? My thinking is vacuum leaks injectors, and intake and throttle body is next.

Installed new head gasket and aftermarket head Valve lash set int .020 exhaust .025 timming mark set middle mark

 

The valve clearance values that you have stated in your post are THE SAME... 0.20mm IS .008" on the Intake side and 0.25mm IS .010" for the exhaust side. Reset your valve clearance and see if things get better. If the issue continues, then start searching for the vacuum leaks that you have suggested.