Cooling system issue
Thread Starter
|
Grand HDF Member
Joined: Mar 2007
Posts: 4,928
Likes: 285
From: Edmond Oklahoma
Cooling system issue
My cooling fans quit running this week while riding the bike. Its hot here in Oklahoma, so I typically here the fan at a stoplight. Now I just get the rear cylinder kicking off. I’m not getting any warning lights, and I can turn the fans and pump on manually with the engine off cooling air bleed proceeder.
ideas? Temperature switch maybe?
Beary
ideas? Temperature switch maybe?
Beary
Thread Starter
|
Grand HDF Member
Joined: Mar 2007
Posts: 4,928
Likes: 285
From: Edmond Oklahoma
My cooling fans quit running this week while riding the bike. Its hot here in Oklahoma, so I typically here the fan at a stoplight. Now I just get the rear cylinder kicking off. I’m not getting any warning lights, and I can turn the fans and pump on manually with the engine off cooling air bleed proceeder.
ideas? Temperature switch maybe?
Beary
ideas? Temperature switch maybe?
Beary
Beary
Road Captain
Joined: Oct 2020
Posts: 518
Likes: 593
From: Central Iowa
On my 2015 Ultra Limited the fans rarely come on unless I'm in heavy stop and go, slow speed traffic in very hot weather (80+ degrees) with a lot of idling. Even when the temps get into the high 90's they come on so rarely that when I do hear them I often think to myself, "Oh yeah, I forgot my bike has cooling fans". LOL
Thread Starter
|
Grand HDF Member
Joined: Mar 2007
Posts: 4,928
Likes: 285
From: Edmond Oklahoma
On my 2015 Ultra Limited the fans rarely come on unless I'm in heavy stop and go, slow speed traffic in very hot weather (80+ degrees) with a lot of idling. Even when the temps get into the high 90's they come on so rarely that when I do hear them I often think to myself, "Oh yeah, I forgot my bike has cooling fans". LOL
The way I understand it, the EITMS comes on when the outside temp is above 80 degrees. The Cooling fans kick on when the coolant temp is above 221 degrees. I guess that means the EITMS can kick on even when the coolant is not hot?
Barry
Stellar HDF Member
Joined: Jun 2017
Posts: 2,325
Likes: 1,155
From: Oklahoma
Thats right, two different thing. I'm in your neck of the woods too, just NE of you. Stop and go traffic this time of the year with EITMS enabled, and its gonna do its thing at about every light. But I rarely notice the fans coming on, doesn't meant they're not, just don't notice it. Unless, like yesterday, when I got to the house I left the bike idling for a bit because I was messing with something before pulling into the garage... and the fans kicked on and ran for a few seconds even after turning bike off. Usually only time I notice is if the fans start in a parking lot or in my driveway or are if they are still running after I turn the bike off, I don't hear them in traffic. I don't usually put my hands down by them when riding to see if they're blowing hot air. But just because the EITMS is doing its thing doesn't mean the fans are supposed to be running too.
Last edited by Ssitruc; Jul 21, 2021 at 11:21 AM.
Road Captain
Joined: Oct 2020
Posts: 518
Likes: 593
From: Central Iowa
Can’t comment on that as I disabled my EITMS on around day two of owning my bike, drove me up the wall listening to what was basically a misfire every time I came to a stop. In the end I wouldn’t worry about it, Twin Cooling is just a supplemental system to help out the main air cooling, I rode mine with a dead water pump for over 25 miles including some city traffic with no ill effects.
Cruiser
Joined: Apr 2012
Posts: 194
Likes: 14
From: Florida
Quick test to see if cooling system is working:
- Kill switch OFF
- Ignition to ON
- Roll throttle at least halfway, hold for 3 seconds.
The fans should come on. Pump should be running also,
Another way to see if the pump is working, is to ride until the bike is warm, then check with your hand to see if the air coming out of the vents in the lowers is warm, or just at ambient temperature. If ambient, the pump is not circulating coolant. If coolant is circulating the air will be warm even if the fans are not running.
If you need a new pump, HD now has a kit to upgrade the (very poor) original pump to the newer design used on the M8. It comes with pump, new bracket, new hoses, clamps, and so forth, as the new pump is dimensionally different than the old one, and the mounting holes and hose fittings are different. Lowers need to come off to do the install. Can be done in your garage (best to have a bike lift) but it's a little complicated.
My 2014 FLHTK is on it's fourth pump (130k miles). Finally got the new design. Hope it lasts!
- Kill switch OFF
- Ignition to ON
- Roll throttle at least halfway, hold for 3 seconds.
The fans should come on. Pump should be running also,
Another way to see if the pump is working, is to ride until the bike is warm, then check with your hand to see if the air coming out of the vents in the lowers is warm, or just at ambient temperature. If ambient, the pump is not circulating coolant. If coolant is circulating the air will be warm even if the fans are not running.
If you need a new pump, HD now has a kit to upgrade the (very poor) original pump to the newer design used on the M8. It comes with pump, new bracket, new hoses, clamps, and so forth, as the new pump is dimensionally different than the old one, and the mounting holes and hose fittings are different. Lowers need to come off to do the install. Can be done in your garage (best to have a bike lift) but it's a little complicated.
My 2014 FLHTK is on it's fourth pump (130k miles). Finally got the new design. Hope it lasts!
Trending Topics
Thread Starter
|
Grand HDF Member
Joined: Mar 2007
Posts: 4,928
Likes: 285
From: Edmond Oklahoma
Well, this is all good news. I was going to ride to work today because Oklahoma is in a bit of brief cool period (90 degrees), but I didn't because I didn't want to make issues worse. I will ride tomorrow.
The reason I was confused is because I can turn the fans and pump on with the engine off. But, further explanations bring it all together.
I'm looking to trade this bike for a M8. So, I might miss replacing the pump on this bike.
Thanks all for your help.
Beary
The reason I was confused is because I can turn the fans and pump on with the engine off. But, further explanations bring it all together.
I'm looking to trade this bike for a M8. So, I might miss replacing the pump on this bike.
Thanks all for your help.
Beary
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Thread
Thread Starter
Forum
Replies
Last Post