"It's just WD-40 on the header!" That was what we said at the race shop when a major fluid leak happened on startup. It all started like this, we always sprayed WD-40 on the headers of the Formula Fords to prevent rust. On startup, they would smoke for a bit and then clear up. Well, one day the header just kept smoking. The car's owner kept asking why this was. "It's just WD-40 on the header. Don't worry," came the reply from the shop owner. After several minutes of smoke it became obvious that there was something amiss. We then noticed the large pool of oil on the floor. It turns out that if the oil pressure sender on a Formula Ford is not installed, it shoots a nice stream of oil onto the header. And that's the end of that story.
Tim