September 4, 201510 yr Author So there are telltale signs of coolant dried on the back of the cylinder. Pulled head and it was caked with white crud. The rubber gaskets look fine. But the fan is turning slow enough where I can see the insides of the blades turning. It is pulling hot air out but it's more of a waft. I'm wondering if that means the fan is bad or that it's not getting enough current, any ideas?
September 4, 201510 yr My 07 with a ducati ignition had a fast fan speed when new and it got slower over the years. You probably don't have enough current. Hook up a 12 volt battery and compare speeds.
September 5, 201510 yr I think you are describing something slightly different, but when the thermostats are on the way out they cause the fan to stutter and come on for brief periods at a time.
September 5, 201510 yr omit thermostat, ie leave fan on all time if symptoms are the sme coolant is too low or not circulating. Pump gas or race gas has little to do with whether the fan or coolant are doing the first job.
September 18, 201510 yr Author Problem solved - the rectifier was bad and made the fan run too slowly. Took a chance and bolted a new one in and that was it! Thanks all!
September 19, 201510 yr Author Thanks! Didn't want this to be one of those threads where you never hear the answer to what the problem was!
September 19, 201510 yr Problem solved - the rectifier was bad and made the fan run too slowly. Took a chance and bolted a new one in and that was it! Thanks all! I was just going to post that that's what happened to me on an older Gas Gas. It was frustrating because I couldn't see that the fan was turning slowly, everything seemed to be working normally until it overheated.
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.