No crank when warm
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Mountain Pass
Joined: Jul 2009
Posts: 168
Likes: 4
No crank when warm
I posted awhile back about this issue and I still haven't got it figured out. When my truck warms up to operating temp, and I shut it off, it will not crank the starter over until it sits for about a half hour or so. When it first started doing this a couple months ago, I could jump the starter at the solenoid and it would crank and fire, today it wouldn't let me jump starter either. I know that some sensors and the fan clutch will sometimes cause this. I tried unplugging the fan clutch before and it still didn't crank. I'm wondering if things like the ipr, or the icp could cause this issue as well.
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Mountain Pass
Joined: Jul 2009
Posts: 168
Likes: 4
That's the thing, before today it would let me jump the starter and it would crank. I'm sure the starter is probably beat, even though it's only a year old. But this no crank over had been happening for a long time now, and it really doesn't act like a hot start starter situation, no click, no slow roll, just no roll. No power going to trigger on solenoid kinda thing. And I noticed before of I jumped the solenoid but didn't crank it till it started I could then crank it with the key. And thanks for the quick reply.
Fleet Mechanic
Joined: Nov 2016
Posts: 1,343
Likes: 94
If you are getting power to the starter when the key is turned and nothing happens, unless the engine is locked up, your starter is the thing I suspect as bad.
But if there is no power at the starter when the key is turned, then something upstream is preventing it.
But if there is no power at the starter when the key is turned, then something upstream is preventing it.
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Mountain Pass
Joined: Jul 2009
Posts: 168
Likes: 4
So new development, got home from work after truck sat four hours, hit the key and click, no crank, this is new. Hit key again, nothing, no click. So, I will be putting a 6.4 starter on it tomorrow and I will see if the original issue is still there. Maybe there had been a dead spot on the armature this whole time, I guess we will see. Thanks for the input.
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Mountain Pass
Joined: Jul 2009
Posts: 168
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Yeah Navistar, I have kept checking the relay almost every time it had acted up and I can feel it clicking when trying to crank, have even swapped it out just cause and it didn't work. I'm hoping the starter has been the issue this whole time even though the symptoms weren't exactly perfect for hot starter. I have had the hot starter issues before on my gasser 250 and when hot would act like dead batteries, roll over slow, but still crank, that's why I didn't believe starter, and i could jump the solenoid and start before, but now that it gave me the click after sitting four hours, probably has been the starter this whole time.
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Laughing Gas
Joined: Dec 2010
Posts: 1,155
Likes: 0
From: Las vegas nevada
i have a 6.4 starter im waiting to put in after be truck comes home from body shop... anyone have issues with it grinding off flywheel teeth every once in a while 6.4 starter that is......
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Mountain Pass
Joined: Jul 2009
Posts: 168
Likes: 4
I am waiting on amazon order, got a dB electrical 6.4 starter for 86 bux brand new, would have just bought one local but even with my business discount it was still 150 plus core for a visteon rebuild, and i want to rebuild old one for a spare. Hopefully it was my whole problem with this no crank when warm issue, the symptom just seemed different than the normal hot start slow crank. I will update as soon as I get it installed and test it out hot.
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Mountain Pass
Joined: Jul 2009
Posts: 168
Likes: 4
So this apparently was my issue all along. I guess I have learned a new symptom of hot starter failure. Got the 6.4 one installed a couple days ago and has been working flawlessly. I have been wrenching for 30 yrs now and this is the first hot starter that has acted this way. Always learning. Thank you all for the help. Oh yeah, 6.4 starter upgrade is a must for 6.0, especially when you can get new db electric ones from amazon for 86 bux.
Lead Driver
Joined: Dec 2006
Posts: 6,496
Likes: 94
From: So. Jersey
So this apparently was my issue all along. I guess I have learned a new symptom of hot starter failure. Got the 6.4 one installed a couple days ago and has been working flawlessly. I have been wrenching for 30 yrs now and this is the first hot starter that has acted this way. Always learning. Thank you all for the help. Oh yeah, 6.4 starter upgrade is a must for 6.0, especially when you can get new db electric ones from amazon for 86 bux.
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