If you pull the radiator I think you will see evidence of leaks from the thermostat housing O ring and the hoses that connect to the t-stat housing. Mixed with dirt and road grime it appears oily in nature but it is coolant. The coolant runs down and out the lower part of the channel below the water pump (at upper red arrow in pic with two arrows) and out the square opening near the round water pump weep hole. The water pump cover bolts to the block and leaves a channel between the cover and the block to drain leaks from above the engine. Every clamp in the vee is either loose, or over tightened, causing leaks.įunny thing is, I also have a 2007 with 81,000 miles on itĬlassic leak from the vee above the engine block. Front water pump cover gasket died along time ago, causing the coolant to leak out near the alignment dowels and run down the sloped edge of the cover and out the square hole making it look worse than it really is (I hope I'm right on this one).ĥ. Hose rubbed against a hoseclamp and caused puncture. With that much coolant leaking, My guess would be: 1. I'm betting you have rust and or corrosion on them causing them to leak also. Pull the hoses off the T-stat housing and check the metal pipes the hoses attach to. Pull the radiator, remove the cross brace, pull your T-stat housing out, (Good time to replace the T-stat and O-ring), with 81,000 miles on it, I would go ahead and replace all the hoses for peace of mind, and so you don't have to do it again later. I would not ride the bike any further until you figure out whats going on! If anyone would like to see pictures of what the fittings look like during a leak repair process, PM me a phone number or email address and I'll send some your way.ĭamn, you got a pretty serious leak going on there! Did you clean the area around the ROUND weep hole inspecting it? If not, it looks like the water pump mechanical seal went south and its pumping out enough coolant to keep that small area clean (I hope I'm wrong). This will normally fix your coolant leak issues, short of a damaged hose. To be safe (and not have to do it a second or third time) when you are working with leaks in this area you should replace the water pump housing o-ring, remove and clean the T-stat housing, replace the T-stat and o-ring, and verify that it is not a failing water pump (weep hole) and while your in there, clean all the black paint off the radiator elbows (inside and out). When it fails it leaks coolant past the o-ring and onto the LEDGE that joins the two surfaces together on the front of the engine, this coolant then slides down the ledge and leaks out of the SQUARE hole, making people think that its the clamps up in the VEE area. While some people just want to try to snug or tighten the loose clamps in an attempt to fix leaks, this is NOT a good idea by itself, the reason being is once the clamps loosen up over time and heat cycles, the coolant then seeps past the clamp and gets on the metal pipe (side of T-stat body housing) and starts to corrode and rust the metal fittings, causing even more leaks! Its a much better idea to remove the T-stat housing completely and clean or wire brush the fittings before putting it back on or tightening it up more.Īnother area that is commonly missed is the water pump housing o-ring that is mentioned here. Let me throw a couple little things out here that have not been discussed.
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