trouble starting engine when hot
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Junior User
Joined: Dec 2004
Posts: 52
Likes: 0
From: mpls. mn.
trouble starting engine when hot
hi members, gotta problem and need some advice.
my truck starts great for cold starts. it even starts great if i take a 20 min.
trip and wait 10 min. or so b4 restarting. the volt guage is charging between 14-16 volts when running. i have a new battery and starter. my problem is this:
if i take a 20 min trip or longer, park the truck for 2min. and restart, the engine barely turns over and the volt guage shows 8-10 volts. is my starter getting too hot and cant turn the engine? but it cools down after 10 min or so and turns over like a cold start. i cant figure it out, but i know someone has the answer.
thanks in advance
my truck starts great for cold starts. it even starts great if i take a 20 min.
trip and wait 10 min. or so b4 restarting. the volt guage is charging between 14-16 volts when running. i have a new battery and starter. my problem is this:
if i take a 20 min trip or longer, park the truck for 2min. and restart, the engine barely turns over and the volt guage shows 8-10 volts. is my starter getting too hot and cant turn the engine? but it cools down after 10 min or so and turns over like a cold start. i cant figure it out, but i know someone has the answer.
thanks in advance
Fleet Owner
Joined: Jul 2004
Posts: 27,298
Likes: 1,059
From: NM
8-10 volts when cranking? Sounds like pretty heavy starter draw, but not out of the question. Honestly, I'd suspect the battery, but you say it's new? Is the starter a 12v or 6v running on 12? A 6v starter will draw a ton of current on 12v. How many amps is the battery rated for? Is the starter relay a 6v or 12v?
These starters are also known to have the armature rub on the windings, a common practice is to have the armature steel cut in a lathe about (I think) 50 thousandths.
These starters are also known to have the armature rub on the windings, a common practice is to have the armature steel cut in a lathe about (I think) 50 thousandths.
Fleet Mechanic
Joined: Apr 2004
Posts: 1,443
Likes: 5
From: Willamette Valley, Oregon
A buddy of mine had a C***Y once that the allumnium pistons swelled up so much the thing would not start, or hardly crank when it was good and hot.. I dont know exactly how it ran, it was fine running, and fine starting when cool, just seemed to bind up when starting hot...
Postmaster
Joined: Apr 2004
Posts: 3,005
Likes: 2
From: Santa Clarita
Sounds like a timing problem. If the engine is too far advanced, the engine will crank really slow and sound like it doesn't want to turn over at all when its hot. Retard the timing a little and see if it improves.
Lead Driver
Joined: Apr 2002
Posts: 8,813
Likes: 13
From: Littleton, New Hampshire
If you didn't have a new starter my guess would be that the starter is dragging. Knowing what engine you have might help... 
Vern
Vern
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New User
Joined: Mar 2006
Posts: 18
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check to see if your battery cables are getting hot. could be a bad cable or a loose connection.
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Hotshot
Joined: Oct 2004
Posts: 15,882
Likes: 88
From: Durham NC
Are you running headers? If so this is a common issue, the headers heat soak the starter. If the above suggestions don't work, add an aluminum sheet heat shield between the headers and starter. Having the headers ceramic coated inside and out will go a long way to reduce underhood heating.
