Slow Turnover when engine's hot? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cstanley · 05-03-2006, 09:27 AM

anyone know what causes this? timing? truck cranks beautifully when cold or when it has been sitting for 20-30 min. after being hot. when hot, it's almost like the battery is dying, and it cranks with such difficulty (the battery is not dying and the starter is new - but it did this with the old starter as well.)

any ideas?

shifty · 05-03-2006, 09:33 AM

sounds like heatsoak on the starter to me. try using a starter wrap or heatshield on the starter and solenoid and see if it continues.

fade94 · 05-03-2006, 09:35 AM

Green Machine · 05-03-2006, 09:51 AM

Timing could be too far advanced, starter even if new could be getting heat soaked, especially if you have headers. You might try one more starter, get one for a big block application, they have more torque, bigger parts inside, same size on the outside.

Livrat · 05-03-2006, 10:26 AM

I had the same issue with the big block in my 68.. Turns out there was corrosion on the terminal on the positive battery cable where it bolted to the starter.. new cable installed.. all is fine..

Frizzle Fry · 05-03-2006, 10:53 AM

I had the same problem. Finally bit the bullet and got one of these: CVR Protorque Mini The thing is awesome! No heatsoak even with my full-length headers and it cranks up fast! Weighs less too.

Frizzle Fry · 05-03-2006, 10:56 AM

BTW, I bought from these guys.

**truckdude239** · 05-03-2006, 01:07 PM

sounds like heat soak to me

cstanley · 05-03-2006, 02:39 PM

i don't think i can swallow $160 fro a new starter when i just got the $35 core exchange on this one, but it sounds like it could be worth it. i have less than an inch of clearance between my starter and factory exhaust. can i fit starter wrap/heat shield?

is heat wrap something i can walk into pep boys and get, or will i have to order it? sounds like asbestos blanket.

shifty · 05-03-2006, 02:53 PM

the starter shield stuff is like ... almost like that silvery crap you put in your window to block out the sun. it will fit. it's like a small pouch/blanket. you might find it at the auto parts chain store.

**raggedjim** · 05-03-2006, 03:39 PM

This is what I did and I haven't had a problem in the 2 years since I did it.
http://www.maliburacing.com/starter_solenoid.html
It also makes the cable going to the starter so it is only hot when you are cranking the truck (which is good if you have ever melted that cable to your headers...

)

It is cheap and I went through everything you have including a heat shield and this is what worked for me.

Oh, I am running HEI, if you still have the old ballest wire it will get connected to the "I" terminal on the new solenoid...

Good luck, Rg

junkyardjohn · 05-03-2006, 03:42 PM

WELL.. IT'S EITHER THE TIMING OR THE STARTER. I WOULD TRY THE TIMING FIRST BEFORE I SPENT $160 ON A STARTER THAT MIGHT NOT BE THE PROBLEM. ANY TIME YOUR NOT SURE OF THE SOURCE OF THE PROBLEM, I ALWAYS TRY THE CHEAP OR FREE STUFF FIRST. IF YOU DO WIND UP BUYING ANOTHER STARTER DON'T GIVE THEM YOUR NEW ONE AS A CORE. INSTEAD GO TO THE BONE YARD & GET A JUNK ONE & RETURN THE NEW ONE FOR A REFUND. YOU PROBABLY AREADY GAVE THEM A PERFECTLY GOOD ONE. JOHN

cstanley · 05-03-2006, 04:03 PM

thanks guys. nope, my old one was definitely trashed. it had always been sort of loud when cranking, i thought. then it was making crazy grinding/chewing racket the other day. pulled it, and the gear was ripping itself off of the shaft. it was almost completely torn through. caught it just in time, hopefully my flywheel isn't damaged. the new starter works like a dream...i can't ever remember it being that quiet and easy to start (except for the heat thing.) maybe the other one was always improperly shimmed/aligned.

05-03-2006, 09:27 AM	#1
cstanley Senior Member Join Date: Oct 2005 Location: Austin, TX Posts: 1,229	Slow Turnover when engine's hot? anyone know what causes this? timing? truck cranks beautifully when cold or when it has been sitting for 20-30 min. after being hot. when hot, it's almost like the battery is dying, and it cranks with such difficulty (the battery is not dying and the starter is new - but it did this with the old starter as well.) any ideas? __________________ "Anybody who would paint his truck like this, would go to a minister's funeral dressed in feathers!" - Big Enis Burdett '72 Blazer Restoration Blog: http://sportchicken.blogspot.com/

05-03-2006, 09:33 AM	#2
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,373	Re: Slow Turnover when engine's hot? sounds like heatsoak on the starter to me. try using a starter wrap or heatshield on the starter and solenoid and see if it continues. __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.

05-03-2006, 09:35 AM	#3
fade94 Registered User Join Date: Mar 2005 Location: Melissa, TX Posts: 799	Re: Slow Turnover when engine's hot? __________________ 68 short bed driver (71 clip on it now, swapping to 68 when weather cooperates) 67 short step project (will get SWB from the 68) 67 Camaro, #'s matching (my wife's) 03 Dodge Ram 2500 4x4 diesel 5 speed 4.10 rear

05-03-2006, 09:51 AM	#4
Green Machine Senior Member Join Date: Jul 2004 Location: Estherville, Iowa Posts: 3,371	Re: Slow Turnover when engine's hot? Timing could be too far advanced, starter even if new could be getting heat soaked, especially if you have headers. You might try one more starter, get one for a big block application, they have more torque, bigger parts inside, same size on the outside. __________________ 1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0

05-03-2006, 10:26 AM	#5
Livrat Member #1049 Join Date: Jun 2000 Location: Troy Montana Posts: 3,940	Re: Slow Turnover when engine's hot? I had the same issue with the big block in my 68.. Turns out there was corrosion on the terminal on the positive battery cable where it bolted to the starter.. new cable installed.. all is fine..

05-03-2006, 10:53 AM	#6
Frizzle Fry Registered User Join Date: Aug 2005 Location: Hillsboro Oregon Posts: 6,449	Re: Slow Turnover when engine's hot? I had the same problem. Finally bit the bullet and got one of these: CVR Protorque Mini The thing is awesome! No heatsoak even with my full-length headers and it cranks up fast! Weighs less too.

05-03-2006, 10:56 AM	#7
Frizzle Fry Registered User Join Date: Aug 2005 Location: Hillsboro Oregon Posts: 6,449	Re: Slow Turnover when engine's hot? BTW, I bought from these guys.

05-03-2006, 01:07 PM	#8
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: Slow Turnover when engine's hot? sounds like heat soak to me __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

05-03-2006, 02:39 PM	#9
cstanley Senior Member Join Date: Oct 2005 Location: Austin, TX Posts: 1,229	Re: Slow Turnover when engine's hot? i don't think i can swallow $160 fro a new starter when i just got the $35 core exchange on this one, but it sounds like it could be worth it. i have less than an inch of clearance between my starter and factory exhaust. can i fit starter wrap/heat shield? is heat wrap something i can walk into pep boys and get, or will i have to order it? sounds like asbestos blanket. __________________ "Anybody who would paint his truck like this, would go to a minister's funeral dressed in feathers!" - Big Enis Burdett '72 Blazer Restoration Blog: http://sportchicken.blogspot.com/

05-03-2006, 02:53 PM	#10
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,373	Re: Slow Turnover when engine's hot? the starter shield stuff is like ... almost like that silvery crap you put in your window to block out the sun. it will fit. it's like a small pouch/blanket. you might find it at the auto parts chain store. __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.

05-03-2006, 03:39 PM	#11
raggedjim Senior Member Join Date: Jun 2002 Location: Murray, Kentucky Posts: 3,514	Re: Slow Turnover when engine's hot? This is what I did and I haven't had a problem in the 2 years since I did it. http://www.maliburacing.com/starter_solenoid.html It also makes the cable going to the starter so it is only hot when you are cranking the truck (which is good if you have ever melted that cable to your headers... ) It is cheap and I went through everything you have including a heat shield and this is what worked for me. Oh, I am running HEI, if you still have the old ballest wire it will get connected to the "I" terminal on the new solenoid... Good luck, Rg __________________ Roger '68 Short step - https://67-72chevytrucks.com/vboard/...d.php?t=849675 '69 ('70?) 2wd Blazer '70 GMC Jimmy 2wd '73 Firebird - https://67-72chevytrucks.com/vboard/...d.php?t=853203 Ideas - https://67-72chevytrucks.com/vboard/...d.php?t=851743 Last edited by raggedjim; 05-03-2006 at 03:45 PM.

05-03-2006, 03:42 PM	#12
junkyardjohn Registered User Join Date: Aug 2001 Location: SOMERSET KY. Posts: 6,425	Re: Slow Turnover when engine's hot? WELL.. IT'S EITHER THE TIMING OR THE STARTER. I WOULD TRY THE TIMING FIRST BEFORE I SPENT $160 ON A STARTER THAT MIGHT NOT BE THE PROBLEM. ANY TIME YOUR NOT SURE OF THE SOURCE OF THE PROBLEM, I ALWAYS TRY THE CHEAP OR FREE STUFF FIRST. IF YOU DO WIND UP BUYING ANOTHER STARTER DON'T GIVE THEM YOUR NEW ONE AS A CORE. INSTEAD GO TO THE BONE YARD & GET A JUNK ONE & RETURN THE NEW ONE FOR A REFUND. YOU PROBABLY AREADY GAVE THEM A PERFECTLY GOOD ONE. JOHN __________________ junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. THERES ROOM FOR ALL OF GODS CREATURES RIGHT NEXT TO MY MASHED POTATOES// LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST

05-03-2006, 04:03 PM	#13
cstanley Senior Member Join Date: Oct 2005 Location: Austin, TX Posts: 1,229	Re: Slow Turnover when engine's hot? thanks guys. nope, my old one was definitely trashed. it had always been sort of loud when cranking, i thought. then it was making crazy grinding/chewing racket the other day. pulled it, and the gear was ripping itself off of the shaft. it was almost completely torn through. caught it just in time, hopefully my flywheel isn't damaged. the new starter works like a dream...i can't ever remember it being that quiet and easy to start (except for the heat thing.) maybe the other one was always improperly shimmed/aligned. __________________ "Anybody who would paint his truck like this, would go to a minister's funeral dressed in feathers!" - Big Enis Burdett '72 Blazer Restoration Blog: http://sportchicken.blogspot.com/



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