Milwaukee 8 engine temperature
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Tourer
Joined: Oct 2018
Posts: 383
Likes: 49
From: Michigan
Milwaukee 8 engine temperature
What kind of temps are others seeing ?
Looking at my powervision I see head temps upto 400 and engine temps up to 380. Normally only see it get this hot on a long stretch of freeway on a hot day. My bike is about to hit 30k miles..so it must not be to hot. 19 sg 107
Looking at my powervision I see head temps upto 400 and engine temps up to 380. Normally only see it get this hot on a long stretch of freeway on a hot day. My bike is about to hit 30k miles..so it must not be to hot. 19 sg 107
Cruiser
Joined: May 2016
Posts: 151
Likes: 41
From: Central Texas
My 2018 FLHTK engine temperature hits 275 on a regular basis in 100+ degree outside temperatures and the heads hit 300-310 at 100+ outside temperatures. Those temps are from the Power Vision PV-2 mounted on the handlebars...
Road Captain
Joined: Nov 2019
Posts: 655
Likes: 759
From: Coconino County AZ
Never had a cylinder head temp gauge on any of my bikes and haven't ever seen a max spec for a Harley. Of course a H-D max operating temp would govern but 400-deg does not sound unreasonable to me based on piston powered aircraft I've flown. A 310HP air cooled aircraft engine normal operating range can go up to 480-deg and run like that all day and into the night and not be a problem. Aircraft specs are generally very conservative. So if you can't find a definitive max operating temp from H-D, this could give you a point of reference.
Seasoned HDF Member
Joined: Feb 2008
Posts: 22,999
Likes: 11,439
SG/RG is oil cooled head not coolant . They will run a bit hotter than the full touring bikes with Coolant and lowers . With sidecar head temp 260-280 are normal. Real hot day in traffic 300 can be seen but never an issue. My older non wet heads would hit 360.
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Tourer
Joined: Oct 2018
Posts: 383
Likes: 49
From: Michigan
Oh noooo..this means it started many years ago as a teenager. do you think its to much ? I've gotta do something about this immediately.
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Joined: May 2012
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From: Carlsbad, CA
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Cruiser
Joined: Jun 2020
Posts: 117
Likes: 105
From: USA
Never had a cylinder head temp gauge on any of my bikes and haven't ever seen a max spec for a Harley. Of course a H-D max operating temp would govern but 400-deg does not sound unreasonable to me based on piston powered aircraft I've flown. A 310HP air cooled aircraft engine normal operating range can go up to 480-deg and run like that all day and into the night and not be a problem. Aircraft specs are generally very conservative. So if you can't find a definitive max operating temp from H-D, this could give you a point of reference.
Can you tell me what engine?
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Joined: Nov 2019
Posts: 655
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From: Coconino County AZ
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