I recently noticed that driving this Saturday from Guelph all the way down to Ajax (exits 195 to 401), just as I get on exit 401 (Salem), my water temp gauge (stock cluster one) goes from normal operating temp and starts bobbing down, almost a few ticks over cold, then when I get to a complete stop at the intersection, it bobs back up to operating temp. At this time, I’m only running sleepy eyes (air coming in, cooling shit, etc). But sleepy eyes doesn’t exactly allow air to pass through the rad, just the air filter, and cool off whatever else is in the engine bay. But running at 120-130 km/h, it shouldn’t have caused too much of a drastic change. I’ve only been noticing it now… I’m not sure if its happened before… Basically, it only happens during long drives on the highway…
So this morning, I’m driving from Ajax back to Guelph. As I exit, I notice the same thing happening to the temp gauge. This time, I don’t only have sleepy eyes set, I’ve also got spacers on my hood hinges, raising the rear up about 1/2 to 3/4 of an inch. I did noticed that the rubber weather stripping is still there, so not a lot of air can escape that much from my hood. I’ll eventually remove the weather stripping after I get everything sorted… I’ve got no leaks in my water pump, or anywhere else in my cooling system (rad hoses, heater hoses, etc.)
Anyone have any ideas of whats going on?
I pulled over and checked my coolant overflow reservoir and its still at the normal height, just 2-3 cm’s below the MAX line.
I let the engine cool down for an hour, the coolant reservoir is still at the same height, and then I popped off my rad cap. The fluid level is still good…
Any ideas whats going on?