Newbie lost on this issue. Blew head gasket on my 98 328i, no problem. Ran the head to machine shop looked good, replaced stems. Get the motor back together and developed morning start problems. It takes 5-6 times before turning over but starts every time that day until the next morning. Oh, secondary air pump stopped working at the same time. Bench tested ok, relay and everything also ok. Any ideas where to go, no CEL lights either.