When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Suppose your coolant runs out or there is some other problem with the coolant. Cant you continue to operate the bike? Isn't it still an air cooled engine at that point. Just curious.
Gary
A good friend of mine rode the skills competition in Milwaukee last month. The engineers that designed the system were the judges, he asked them this very question.
Their answer was yes, it is the same engine, with cooling ports, and can be ridden as an air cooled engine. The cooled heads were designed for rider comfort.
The owners manual for the 2014 Limiteds sez NO, don't do it. I am curious though how the liquid could just "run out". Seems to me one would notice that happening.
I own a 14 LTD - it "seems" to be leak free now. But, if it leaks again. I will not ride it and will have the dealer come retrieve it. Eventually, we will have data to support one way or the other regarding how long or if its ok to ride with coolant gone. Time will tell.
Of course the manual says not to ride it, whatever caused the problem in the "cooling system" could be further damaged by continually running the engine. But that doesn't mean the engine can't run safely without coolent. I can't remember where I read it, but the article was a MOCO representative explainng that the liquid cooled heads are only for rider comfort and the engine would run fine without coolent if the situation required it.
A good friend of mine rode the skills competition in Milwaukee last month. The engineers that designed the system were the judges, he asked them this very question.
Their answer was yes, it is the same engine, with cooling ports, and can be ridden as an air cooled engine. The cooled heads were designed for rider comfort.
food for thought: the coolant caries the heat away, and the heads with out the coolant passage dissipate the heat through the solid aluminum. I believe that an empty head will not do the same because of the the air gap caused by the area being empty. I also believe that the wet heads being thinner may be susceptible to cracking. IMO
A good friend of mine rode the skills competition in Milwaukee last month. The engineers that designed the system were the judges, he asked them this very question.
Their answer was yes, it is the same engine, with cooling ports, and can be ridden as an air cooled engine. The cooled heads were designed for rider comfort.
Dealers have received a Tech Tip from Harley that says do not continue to operate bike if coolant runs out or if coolant temperature light will not go off.
food for thought: the coolant caries the heat away, and the heads with out the coolant passage dissipate the heat through the solid aluminum. I believe that an empty head will not do the same because of the the air gap caused by the area being empty. I also believe that the wet heads being thinner may be susceptible to cracking. IMO
Very difficult to quantify because the cooling system attachements to the heads may themselves dissipate enough heat to keep the head metal materials stable. I can't imagine Harley hasn't tested this senario. In fact since they have said it doesn't hurt the engine, we should assume (I know) they have tested the engine without coolent.
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.