Hot engine won't start?

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   with a new starter, its a good bet that you have something getting TIGHTER as the engine heats up.. Maybe you got carbon the pistons ... maybe just drag between the pistons expanding and TIGHT in the bores.... you could try to rotate the engine with a torque wrench on the crank pulley when hot / cold and compare...

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steve(ill) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 89350	Post Options Post Reply Quote steve(ill) Report Post Thanks(0) Quote Reply Posted: 24 Jun 2025 at 7:44pm
	with a new starter, its a good bet that you have something getting TIGHTER as the engine heats up.. Maybe you got carbon the pistons ... maybe just drag between the pistons expanding and TIGHT in the bores.... you could try to rotate the engine with a torque wrench on the crank pulley when hot / cold and compare...
	Like them all, but love the "B"s.

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Ed (Ont) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 08 Nov 2009 Location: New Lowell, Ont Points: 1538	Post Options Post Reply Quote Ed (Ont) Report Post Thanks(0) Quote Reply Posted: 24 Jun 2025 at 7:28pm
	You have thrown a lot of parts at it and none of those will cure the problem you said you had which seems to be not turning over well hot. Check your timing to see that it is correct. Too much advance could cause that same problem. Put a starter on it. Or get yours rebuilt - that may be the better option given the poor parts quality these days. Edited by Ed (Ont) - 24 Jun 2025 at 9:12pm

modirt Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 18 Jul 2018 Location: Missouri Points: 9008	Post Options Post Reply Quote modirt Report Post Thanks(0) Quote Reply Posted: 24 Jun 2025 at 6:58pm
	Since last year, new points, plugs, condenser and distributor cap. Was advised to get new air filter. I said was probably fine, but did so anyway. Hard to find industrial canister type. Pulled out old filter and found a birds nest and feathers helping filter. Running on a new filter now. New gas tank (aluminum fuel cell sold to race car guys), new starter, new battery, new gauges, including tach with hour meter. Those are hard to find. Did look at battery cables and they are smaller gauge than I remember. Can put on larger ones. Is it possible something in the engine is expanding enough when hot to be that much of a problem turning it over? Engine has enough power to spin it but battery and starter don't? Fresh 10-30 oil.......looks clean and slick. Edited by modirt - 24 Jun 2025 at 6:59pm

Ed (Ont) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 08 Nov 2009 Location: New Lowell, Ont Points: 1538	Post Options Post Reply Quote Ed (Ont) Report Post Thanks(0) Quote Reply Posted: 24 Jun 2025 at 6:50pm
	Certainly sounds like a bad starter. Slow to turn hot usually indicates starter problem. But check all your cables and connections as well and battery condition. If that starter is 50 years old it has done well!!!! Gear reduction starter on that?? Chrysler used those a lot.

Joe Goodwill Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Access Joined: 12 Sep 2009 Location: Souris Manitoba Points: 92	Post Options Post Reply Quote Joe Goodwill Report Post Thanks(0) Quote Reply Posted: 24 Jun 2025 at 5:18pm
	Mid 70’s Chevy 454 would get tight and hard to turn over if you shut it down quick after running hard and temp was up. Never figured it out but that thing was sure hard on back tires!!😳

AveryD12 Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 05 Mar 2018 Location: Foxworth.MS Points: 154	Post Options Post Reply Quote AveryD12 Report Post Thanks(0) Quote Reply Posted: 24 Jun 2025 at 3:17pm
	I had similar issues with a Chrysler product. When the engine got up to operating temp and it had run for an hour or so it wouldn’t restart until it cooled down. Found it to be a bad starter. Don’t know if this could be your problem or not. Avery

Tbone95 Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 31 Aug 2012 Location: Michigan Points: 12338	Post Options Post Reply Quote Tbone95 Report Post Thanks(1) Quote Reply Posted: 24 Jun 2025 at 2:25pm
	Just doesn’t seem like stuff like fuel line insulation, coil, condenser would have anything to do with barely being able to crank it. Ground going bad or something seizing.

modirt Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 18 Jul 2018 Location: Missouri Points: 9008	Post Options Post Reply Quote modirt Report Post Thanks(0) Quote Reply Posted: 24 Jun 2025 at 2:08pm
	Now that I think of it, there may be another cause/fix. The fuel line from the fuel pump is now exposed. Somebody had wrapped it with a glass mat insulation and black tape, but that is now gone. I have some insulation tube that I forgot to install. That may help. It also may not help that the radiator and fan are mounted up high and remote. No cooling fan on the motor block itself, so no help for the fuel line. Ground could also do it, but this one has black battery cable running directly from battery to the chassis frame. Previous owner told me he was also looking for a coil, so that may help too. Can't ever recall any farm truck.....once it was running and warmed up......not starting.

TedN Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 30 Apr 2025 Location: Central WA Points: 124	Post Options Post Reply Quote TedN Report Post Thanks(0) Quote Reply Posted: 24 Jun 2025 at 12:54pm
	I would guess you are getting voltage drop between battery and starter, a voltage test at the starter while cranking will tell you. get a set of test leads (I have a Maddox 30' set from Harbor Freight, under $20) so you can check from the starter housing to the positive lead. What I have most commonly found is the ground isn't sufficient when hot. A lot of older vehicles used an open weave ground cable that gets to the point it doesn't conduct well. If you don't have a test meter or just want to try an easy way to test for a bad ground, hook jumper cables from the negative terminal on the battery to the engine block when it doesn't start and see if that helps. You could have other issues, but the bad ground is the one I have seen the most. Ted
	190XTD seriesIII, 190XTD seriesI, maroon belly 7000, 190XTD series??? project(or maybe parts)

steve(ill) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 89350	Post Options Post Reply Quote steve(ill) Report Post Thanks(0) Quote Reply Posted: 24 Jun 2025 at 12:26pm
	or a bad coil / condenser... break down when hot... Since it does not DIE when hot, just not RESTART , vapor is a good guess.... Maybe start in ether ?
	Like them all, but love the "B"s.

modirt Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 18 Jul 2018 Location: Missouri Points: 9008	Post Options Post Reply Quote modirt Report Post Thanks(0) Quote Reply Posted: 24 Jun 2025 at 12:04pm
	Have a DewEze Bale Mobale (aka, hay monster) that starts and runs fine. Unless you manage to kill it when hot. Then it won't start. An other wise fully charged battery can barely turn it over. But give it a couple hours to cool down and she turns over and starts right u. Engine is a 318 Chrysler........with carter 2 barrel carb.......from early 70's. Hay monster built on Dodge D600 truck chassis. Aside from the hydraulics, more or less a stock truck. Any ideas on why it won't start? Carb vapor locked maybe?