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Everything Dirt Bike
General Dirt Bike
Wet Gray Sludge on Radiator Cap?
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<blockquote data-quote="pdee4t" data-source="post: 179900" data-attributes="member: 1594"><p>Hey guys. When checking my coolant today, I had noticed a bit of sludge on the bottom of my radiator cap. The coolant itself though, was clean as a whistle, with no traces of oil in it.</p><p>Wondering if this could of been somehow caused from when I got water into the engine/oil? or from combustion gases mixed with water leaking into the engine due to the water that got into it from the air box??</p><p></p><p>Aside from that, I have no coolant loss, nothing is leaking out of the radiator overflow hose, it is not blowing white smoke and it is not overheating(also have a temp gauge fitted, which never goes passed 90 degrees Celsius unless I'm doing very slow riding) and no milky oil. So based on the fact it isn't overheating and lack of other symptoms to suggest a cracked head gasket or cracked cylinder head, I am doubtful of that being the cause.</p><p></p><p>Also had just done a fresh rebuild on it 14.7 hours ago(hour meter) with a brand new head gasket, I had the blocks checked for cracks at the time of the rebuild and all came back clear, and the radiators and radiator cap is fairly new also.</p><p>This is a week or so after I had gotten water into the engine through a deep stream crossing(to me, seems ironic)....this is the 1st time i've checked the coolant/taken the cap off since the rebuild.</p><p>I also always flush out my cooling system properly before re-adding coolant.</p><p></p><p>Just wondering what else a possible cause could be?</p></blockquote><p></p>
[QUOTE="pdee4t, post: 179900, member: 1594"] Hey guys. When checking my coolant today, I had noticed a bit of sludge on the bottom of my radiator cap. The coolant itself though, was clean as a whistle, with no traces of oil in it. Wondering if this could of been somehow caused from when I got water into the engine/oil? or from combustion gases mixed with water leaking into the engine due to the water that got into it from the air box?? Aside from that, I have no coolant loss, nothing is leaking out of the radiator overflow hose, it is not blowing white smoke and it is not overheating(also have a temp gauge fitted, which never goes passed 90 degrees Celsius unless I'm doing very slow riding) and no milky oil. So based on the fact it isn't overheating and lack of other symptoms to suggest a cracked head gasket or cracked cylinder head, I am doubtful of that being the cause. Also had just done a fresh rebuild on it 14.7 hours ago(hour meter) with a brand new head gasket, I had the blocks checked for cracks at the time of the rebuild and all came back clear, and the radiators and radiator cap is fairly new also. This is a week or so after I had gotten water into the engine through a deep stream crossing(to me, seems ironic)....this is the 1st time i've checked the coolant/taken the cap off since the rebuild. I also always flush out my cooling system properly before re-adding coolant. Just wondering what else a possible cause could be? [/QUOTE]
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Wet Gray Sludge on Radiator Cap?
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