Hard starting bbc when hot. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**ScottH** · 08-30-2003, 05:48 PM

Just picked up a 72 402/400 over the weekend and noticed it barely starts when it gets hot. It starts just fine cold, but hardly cranks at all when warmed up. Any ideas?

Thanks.

jef5150 · 08-30-2003, 05:51 PM

put a heat shield by the starter,my old pontiac did that, i tried replacing the starter,but it still did it

jef5150 · 08-30-2003, 05:55 PM

.

jef5150 · 08-30-2003, 06:02 PM

pic#2

jef5150 · 08-30-2003, 06:06 PM

ill get the link ,,,,,good luck,,,,jeff

**ScottH** · 08-30-2003, 06:07 PM

Thanks! Any idea of where I can get a shield?

jef5150 · 08-30-2003, 06:24 PM

you can get them at any speed shop,but heres for moroso type,#74300 http://www.moroso.com/catalog/catego...?CatCode=42022

crazy longhorn · 08-30-2003, 06:43 PM

That one confuses this old man.... I have run BB olds, BB caddy, & big inch sb in my truck. a good battery, good set of cables, & a good starter are the ticket. im not tryin to start a fight, but if the fore mentioned parts are in good shape.....I havent seen a problem

I have also run headers on the Olds, & the Chev(2 of them in the longhorn)......no sheilds , or remote solenoids....no problem. the 461 Olds ran @ 9.8 on comp ratio, as does the 383 Chev(alum head on the chev helps), but I dont see the problem that many guys have stated......perculated fuel, yes I have seen that problem. Good luck, crazyL

dinnut · 08-30-2003, 07:01 PM

this may confuse you, but my 72 did it and it turned out my timing and points were off

jef5150 · 08-30-2003, 07:14 PM

come on guys,,,he asked for ideas! so i was helping him out,my idea isnt so far out in left field,,,,,,jeff,,,,,

crazy longhorn · 08-30-2003, 07:33 PM

No trouble Jeff.....he asked for ideas, & I gave mine

......Im not tryin to "stirr" a problem, but havent seen the problems that MANY guys talk about? crazyL

**Palf70Step** · 08-30-2003, 07:46 PM

My old Pontyrat did the same thing. It was Ok after I replaced solenoid. The heat shield does help..so I'm told...with the starter & solenoid prematurely wearing out because of heat. I never used one, so I can't say if they would have made a difference or not.

**old Rusty C10** · 08-30-2003, 08:35 PM

you may wanna lookinto a heavy duty starter too with the heat shield

**ScottH** · 08-30-2003, 08:39 PM

Thanks for everyone's input. I just got the truck and haven't had the chance to check it out yet. I know the timing was off when I got it, had to advance to spot it from popping (HEI). I got several milk crates of parts, and although I haven't gone through them I did notice an old starter. Oh yea, it has headers also.

The shield sounds like a good way to start, not expensive and can't hurt. Thanks again.

ddsmith · 08-30-2003, 09:33 PM

The big block 454 in the vette was factory equipped with a heat shield and a hi torque starter. It does make a difference. It absorbs the radiant heat from the headers as long as there is an air gap between the shield and the starter.

Longhorn Man · 08-30-2003, 11:35 PM

You'll be best off puting a new starter under that new heat shield too. The damage is already there.
I've lost one starter to my headers, and seen plenty more.
In the newer Grumman delivery trucks with the GM 6.2/6.5, they come stock with the heat shield on them.

HennyM · 09-01-2003, 10:22 AM

Definitely do the starter thing. But don't forget to check the timing & advance. Make sure vacuum isn't getting trapped in the hose to distributor & holding the advance to max position. Thermal vacuum switches can do strange things.

hgs_notes · 09-01-2003, 10:30 AM

This happened with mine too. The timing was advanced too far. I turned it back a few degrees and hot restarts are no problem.

HG

MOTHERTRUCKERS · 09-01-2003, 03:06 PM

Check to make sure your ground straps are good, a bad ground will overheat the starter also

Blue67 · 09-01-2003, 05:29 PM

Check the battery cables also

08-30-2003, 05:48 PM	#1
ScottH Senior Member Join Date: Sep 2002 Location: Hampstead, NC Posts: 8,190	Hard starting bbc when hot. Just picked up a 72 402/400 over the weekend and noticed it barely starts when it gets hot. It starts just fine cold, but hardly cranks at all when warmed up. Any ideas? Thanks.

08-30-2003, 05:55 PM	#3
jef5150 Inline 69 Join Date: Apr 2003 Location: valleysprings,california Posts: 1,018	pic #1 . Attached Images

08-30-2003, 06:02 PM	#4
jef5150 Inline 69 Join Date: Apr 2003 Location: valleysprings,california Posts: 1,018	heres the shield pic#2 Attached Images

08-30-2003, 06:06 PM	#5
jef5150 Inline 69 Join Date: Apr 2003 Location: valleysprings,california Posts: 1,018	3 ill get the link ,,,,,good luck,,,,jeff Attached Images

08-30-2003, 06:43 PM	#8
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	That one confuses this old man.... I have run BB olds, BB caddy, & big inch sb in my truck. a good battery, good set of cables, & a good starter are the ticket. im not tryin to start a fight, but if the fore mentioned parts are in good shape.....I havent seen a problem I have also run headers on the Olds, & the Chev(2 of them in the longhorn)......no sheilds , or remote solenoids....no problem. the 461 Olds ran @ 9.8 on comp ratio, as does the 383 Chev(alum head on the chev helps), but I dont see the problem that many guys have stated......perculated fuel, yes I have seen that problem. Good luck, crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

08-30-2003, 05:51 PM	#2
jef5150 Inline 69 Join Date: Apr 2003 Location: valleysprings,california Posts: 1,018	put a heat shield by the starter,my old pontiac did that, i tried replacing the starter,but it still did it

08-30-2003, 06:07 PM	#6
ScottH Senior Member Join Date: Sep 2002 Location: Hampstead, NC Posts: 8,190	Thanks! Any idea of where I can get a shield?

08-30-2003, 06:24 PM	#7
jef5150 Inline 69 Join Date: Apr 2003 Location: valleysprings,california Posts: 1,018	you can get them at any speed shop,but heres for moroso type,#74300 http://www.moroso.com/catalog/catego...?CatCode=42022

08-30-2003, 07:01 PM	#9
dinnut Registered User Join Date: Apr 2003 Location: missouri city, tx Posts: 4,486	this may confuse you, but my 72 did it and it turned out my timing and points were off __________________ 70 longbed 496/th400/Ford 9"

08-30-2003, 07:14 PM	#10
jef5150 Inline 69 Join Date: Apr 2003 Location: valleysprings,california Posts: 1,018	come on guys,,,he asked for ideas! so i was helping him out,my idea isnt so far out in left field,,,,,,jeff,,,,, Last edited by jef5150; 08-30-2003 at 07:23 PM.

08-30-2003, 07:33 PM	#11
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	No trouble Jeff.....he asked for ideas, & I gave mine ......Im not tryin to "stirr" a problem, but havent seen the problems that MANY guys talk about? crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

08-30-2003, 07:46 PM	#12
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,249	My old Pontyrat did the same thing. It was Ok after I replaced solenoid. The heat shield does help..so I'm told...with the starter & solenoid prematurely wearing out because of heat. I never used one, so I can't say if they would have made a difference or not. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

08-30-2003, 08:35 PM	#13
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,313	you may wanna lookinto a heavy duty starter too with the heat shield __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

08-30-2003, 08:39 PM	#14
ScottH Senior Member Join Date: Sep 2002 Location: Hampstead, NC Posts: 8,190	Thanks for everyone's input. I just got the truck and haven't had the chance to check it out yet. I know the timing was off when I got it, had to advance to spot it from popping (HEI). I got several milk crates of parts, and although I haven't gone through them I did notice an old starter. Oh yea, it has headers also. The shield sounds like a good way to start, not expensive and can't hurt. Thanks again.

08-30-2003, 09:33 PM	#15
ddsmith Glowing since 1978 Join Date: Mar 2001 Location: Lusby,MD,USA Posts: 532	The big block 454 in the vette was factory equipped with a heat shield and a hi torque starter. It does make a difference. It absorbs the radiant heat from the headers as long as there is an air gap between the shield and the starter. __________________ 66 Chevy C30 Stakebody Dump, PS,PB, 327cu in 71 Corvette Coupe 454 4 speed 69 Chevy C20 Custom Camper



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08-30-2003, 11:35 PM	#16
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	You'll be best off puting a new starter under that new heat shield too. The damage is already there. I've lost one starter to my headers, and seen plenty more. In the newer Grumman delivery trucks with the GM 6.2/6.5, they come stock with the heat shield on them.

09-01-2003, 10:22 AM	#17
HennyM Registered User Join Date: Jun 2003 Location: Philadelphia, PA Posts: 15	Definitely do the starter thing. But don't forget to check the timing & advance. Make sure vacuum isn't getting trapped in the hose to distributor & holding the advance to max position. Thermal vacuum switches can do strange things. __________________ '72 Longbed 2WD Mostly used to hide under from the wife & kids. (But coming along nicely) Southampton, PA '87 Chev 1-Ton 4X4 '52 Ford F1 '97 Harley " No Falls... No Balls ! "

09-01-2003, 10:30 AM	#18
hgs_notes GEARHEAD Join Date: Aug 2003 Location: MN Posts: 6,126	This happened with mine too. The timing was advanced too far. I turned it back a few degrees and hot restarts are no problem. HG __________________ If no one knows what you're doing, they can't tell you you're doing it wrong HG's Dream Car Build - Shelby Cobra Kit Build your own adjustable track bar 71 Long Fleet C/10 72 Jimmy 4x4 (Junkyard Jimmy) HG's Plow Truck '78 K35 Dually Bigass Farm Truck HG's thread of miscellaneous stuff

09-01-2003, 03:06 PM	#19
MOTHERTRUCKERS Registered User Join Date: Dec 1999 Location: BRADENTON FLA Posts: 3,269	Check to make sure your ground straps are good, a bad ground will overheat the starter also __________________ Rest in Peace Ed. Thanks for all the good times.

09-01-2003, 05:29 PM	#20
Blue67 Registered User Join Date: May 2003 Location: Wisconsin Posts: 33	Check the battery cables also

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