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Old 06-13-2018, 03:46 PM   #1
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Default 94 d21 ka24e manual won't turn over when warm

So I have a 94 Nissan d21 pickup with the 4cylinder manual transmission. Truck had a blown head gasket at 300xxx. Just did the head gasket, timing chain, chain guides, tensioner, water pump, valve stem seals, coolant temperature sensor, oil pump, oil sending unit, etc. Everything except the bottom end was gone through. It will start fine when cold and run alright, gets pretty bad gas mileage, but when it's warm it will not barely turn the motor over. The starter just drags and I have to wait until it's cool to get it to start again. The starter was rebuilt the first time only to last a day. Replaced it with new Napa starter and still same thing. Please help!
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Old 06-13-2018, 04:06 PM   #2
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Sounds to me like you've got some major heat soak going into your starter. Do you have a laser thermometer? I'd be interested to see what temperature the starter is when your truck's at operating temperature.
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Old 06-13-2018, 04:17 PM   #3
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If the battery is good, I'd say to replace your battery cables.
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Old 06-13-2018, 05:08 PM   #4
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if only when hot, 99% of the time its contacts in the starter are worn out so theres big clearances. The way to confirm this is if you can jump it, but not start it normally when hot.

you can rebuild the contacts for about 5 bucks if you know what you are doing. If not, its time for a new starter.
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Old 06-13-2018, 06:04 PM   #5
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Before the truck had the head gasket job and all other work done to it, the starter would drag every time I went to start it, even when cold but would start every time. After the work was done to it, the starter started it up fine and ran with no issue until the truck was turned off. Then I went to start it and it just kept dragging so I kept on trying and burnt that starter out. Had it rebuilt and then did the same thing to it. So the one that's on it now is a brand new one from Napa. Instead of me keeping on trying it when it's hot and burning it out again I just leave it alone until it's cooled off so I don't have to buy another starter lol. Just can't drive it for at least an hour after it's off because it won't start or even hardly crank but turns over and starts great when cool. The battery is good on it as well. Another thing is, that the battery ground to the head gets really hot whenever I try to crank it over when hot. Don't know if that helps or not
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Old 06-13-2018, 06:08 PM   #6
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You definitely have some electrical issues if your ground cable is getting hot.
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Old 06-13-2018, 06:11 PM   #7
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So if I'm having electrical issues, would the battery cables cause it to drag and not start only when hot though? Wouldn't it cause it to do the same e thing when it's cold? I'm not very knowledgeable about electricity
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Old 06-13-2018, 06:13 PM   #8
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And the ground cable only gets hot when I keep on trying to turn the truck over when it won't start
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Old 06-13-2018, 06:21 PM   #9
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Replace the battery cable. You probably have corrosion inside the cable, making it difficult to pass enough current to crank the starter. When the cable gets warm, the resistance will go down - making it so that it will not crank at all.

If you want to test this, you can grab a set of jumper cables and just use the Negative (-) or Black terminals to connect to the Negative (-) terminal on the battery to the spot where that cable connects to the frame or engine. The jumper cable should be OK, and the engine will crank with no problem.
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Old 06-13-2018, 06:27 PM   #10
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So test the ground wire in that way? Or could it be another wire that's bad making it hot? Will test the negative cable in about 5 minutes
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