Coolant Leak when temps drop
3rd Gear
Joined: Oct 2017
Posts: 7
Likes: 1
From: Virginia
Thank you for your reply MRFREEZE57 - I have used this forum for years to get quality advise. H-D had a problem with the installation of these hose clamps on the lube oil side of the engine, but it looks like the defect extends to my bike on the engine coolant hose clamps. I'll change this defective design out with a 5/8 screw hose clamp, make up the coolant and check for leaks and monitor the fault codes. Searching my bikes condition - Check Engine Light and Engine Coolant Temperature Light came on. Fault Code for ECM - P1019 (Engine Coolant Temperature Sensor) and Pn 001351-01, only found the dealer replacing the Engine Coolant Temperature Sensor (PN 32700066 - $$28.30) and the Coolant pump (PN 26600048 - $110).
This issue was the last point on the Trouble Shooting List:High Engine Temperature
This issue was the last point on the Trouble Shooting List:High Engine Temperature
- Blocked hoses, pipes or passages.
- Restricted air flow through radiator.
- Defective cooling fan.
- Faulty coolant pump.
- Low coolant level.
- Air in system.
- Defective pressure cap.
- Defective engine coolant sensor.
- Pressure cap not properly installed.
- Damaged pressure cap gasket.
- Deteriorated 0-rings on coolant pump or manifolds.
- Leaking hose or hose connection.
Stage III
Joined: Mar 2023
Posts: 3
Likes: 0
From: NC
Engine temp light
[QUOTE=OpaGreg;21061688]Thank you for your reply MRFREEZE57 - I have used this forum for years to get quality advise. H-D had a problem with the installation of these hose clamps on the lube oil side of the engine, but it looks like the defect extends to my bike on the engine coolant hose clamps. I'll change this defective design out with a 5/8 screw hose clamp, make up the coolant and check for leaks and monitor the fault codes. Searching my bikes condition - Check Engine Light and Engine Coolant Temperature Light came on. Fault Code for ECM - P1019 (Engine Coolant Temperature Sensor) and Pn 001351-01, only found the dealer replacing the Engine Coolant Temperature Sensor (PN 32700066 - $$28.30) and the Coolant pump (PN 26600048 - $110).
This issue was the last point on the Trouble Shooting List:High Engine Temperature
This issue was the last point on the Trouble Shooting List:High Engine Temperature
- Blocked hoses, pipes or passages.
- Restricted air flow through radiator.
- Defective cooling fan.
- Faulty coolant pump.
- Low coolant level.
- Air in system.
- Defective pressure cap.
- Defective engine coolant sensor.
- Pressure cap not properly installed.
- Damaged pressure cap gasket.
- Deteriorated 0-rings on coolant pump or manifolds.
- Leaking hose or hose connection.
3rd Gear
Joined: Oct 2017
Posts: 7
Likes: 1
From: Virginia
Replacing the hose clamp did not solve the coolant dumping problem. The same codes appeared after a few rides. I saw a video from a technician at a H-D dealership recommending keeping the two air vents open. It has not happened since I’ve had the vents open, but I’ve ridden the bike thousands of mile with the vents closed without overheating. I can feel the pump and motor vibrating when activating the cooling system (fans and pump). Yesterday I applied Carbon Conductive Grease to the two Coolant Temperature Sensor pins and the Coolant Pump connector pins. Someone suggested the connector pins may have fretting. If this does not work, I'll change the Coolant Temperature Sensor.
Thanks for asking.
Thanks for asking.
3rd Gear
Joined: Oct 2017
Posts: 7
Likes: 1
From: Virginia
JoeXSBike - I really do not know what caused the Check Engine Light and Engine Coolant Temperature Light to come on and Fault Code for ECM - P1019 (Engine Coolant Temperature Sensor). It happened two or three times with coolant overflowing twice. I cleared the codes. What I am thinking is it could be an intermittent coolant temperature sensor fault that does not send a signal for the coolant pump to run - which may cause the engine to overheat. ..but I really do not know.
3rd Gear
Joined: Oct 2017
Posts: 7
Likes: 1
From: Virginia
JoeXSBike - Getting to theEngine Coolant Temperature Sensor (ETCS) requires removal of the left lower fairing on my bike and isn't too bad, but I do not know what resistance reading it should be at cold and hot coolant temperatures. The sensor isn't that expensive (PN 32700066 - $$28.30) , neither is the Coolant pump (PN 26600048 - $110).
You can do a quick check of the coolant pump by removing the plastic cover, turn the throttle to 1/2 way, and turning both of the ignition switches to the run position (do not start). If you put a hand on the coolant pump you should feel the pump and motor vibrating when the two fans come on. There are videos online that show this process.
Good luck Joe!
You can do a quick check of the coolant pump by removing the plastic cover, turn the throttle to 1/2 way, and turning both of the ignition switches to the run position (do not start). If you put a hand on the coolant pump you should feel the pump and motor vibrating when the two fans come on. There are videos online that show this process.
Good luck Joe!
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