look at these plugs - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67ChevyC10Stepside · 02-18-2005, 01:07 PM

i really doubt it matters honestly....these 26s are running real good in there right now.....

GMC AMI · 02-18-2005, 07:40 PM

I ran Autolites when running bb at the drags. They performed more consistanty than Ac. The 400 can overheat without a thermostat, fluid runs too fast thru the system too cool properly. I learned this the hard way when my 72 Chevelle overheated in staging at Show shine and drag. Bums you right out.

*Randy70C-10* · 02-18-2005, 08:46 PM

I personally wouldn't put Champions in my lawn mower. I use AC's in everything, even used them in my 6:71 blown Model A Ford (powered by Chevy). The plugs that you're running are probably fine, what condition are your valve seals in? Worn valve seals will play hell on spark plugs.

67ChevyC10Stepside · 02-18-2005, 08:59 PM

my valve seals are new......the motor didnt overheat.....it wouldnt even get hot enough to register on a guage.....

68C15 · 02-18-2005, 10:39 PM

Im gonna take a swing at this. even though the pics are kind of hard to see by your description I would say it is time for a complete tune-up including a PCV valve, cap, rotor, wires & possible also a coil depending on its integrity. is this a points system? if so give it a set of points & condensor.
I myself recommemd Delco for everything except the plugs. those I say go with a set of 25 or 26 Autolites. I have my reasons for this, & none of it has to do with opinions. all based on experience & seeing the quality of parts these days. avoid the temptation to buy the high dollar whiz-bang high performance parts. unless you are running above 13:1 compression it is a waste of money. trust me, there is a science to this.
then I would give the carb some in-depth tuning using a vacuum guage.
this is all based on the assumption the mechanicles are in good shape (ie. compression, no vacuum leaks etc.)
I forgot to mention why I suggest these steps. it looks like the engine is getting too much fuel & ignition system is not able to burn it.

68C15 · 02-18-2005, 10:42 PM

oh yeah, about the lower hose deal.
is there a good antifreeze-water mix in it? is it possible the "coolant" was froze in the lower hose area & then when the engine warmed up & tried to move the ice it couldnt so the pressure blew the hose off? I have seen it happen.

67ChevyC10Stepside · 02-18-2005, 10:47 PM

when the hose blew off it wasnt very cold....and it was just getting coolant put in...i know why the plugs were the way they are and im not going to mention why because you guys would laugh.

68C15 · 02-18-2005, 10:55 PM

go ahead, tell us why. we promise not to laugh.
as for the hose thing...........PUNT!

67ChevyC10Stepside · 02-18-2005, 10:58 PM

punt?

Robert1970C20rstbukt · 02-18-2005, 11:17 PM

Let me guess..........the hose clamp was loose? or was there even a clamp on the hose?

I've seen that happen before.

67ChevyC10Stepside · 02-18-2005, 11:19 PM

im not an idiot....it was on and i thought it was tight...

68w/sbc406 · 02-18-2005, 11:25 PM

so whats up with the plugs

**COBALT** · 02-18-2005, 11:26 PM

Champions get dirty too quick for my tastes. I like AC Delco.

mr402 · 02-19-2005, 01:35 AM

Stock ignition, Autolite. HEI Bosch.

02-18-2005, 01:07 PM	#26
67ChevyC10Stepside Registered User Join Date: Mar 2004 Location: Butler PA Posts: 3,032	i really doubt it matters honestly....these 26s are running real good in there right now..... __________________ 67 c-10, 400 SB, TH350, 4.10 gears, Blazer tank,camaro tach, sidemarker fuel fill (soon) WTB: stepside parts, 67 front end parts, 67 small window cab. posi for 3.73 or 4.10 for 12 bolt and 10 bolt.

02-18-2005, 07:40 PM	#27
GMC AMI Registered User Join Date: Apr 2004 Location: The Other Maine! Posts: 2,236	I ran Autolites when running bb at the drags. They performed more consistanty than Ac. The 400 can overheat without a thermostat, fluid runs too fast thru the system too cool properly. I learned this the hard way when my 72 Chevelle overheated in staging at Show shine and drag. Bums you right out. __________________ 1968 Chevy 4x4 307 4 speed

02-18-2005, 08:59 PM	#29
67ChevyC10Stepside Registered User Join Date: Mar 2004 Location: Butler PA Posts: 3,032	my valve seals are new......the motor didnt overheat.....it wouldnt even get hot enough to register on a guage..... __________________ 67 c-10, 400 SB, TH350, 4.10 gears, Blazer tank,camaro tach, sidemarker fuel fill (soon) WTB: stepside parts, 67 front end parts, 67 small window cab. posi for 3.73 or 4.10 for 12 bolt and 10 bolt.

02-18-2005, 10:39 PM	#30
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Im gonna take a swing at this. even though the pics are kind of hard to see by your description I would say it is time for a complete tune-up including a PCV valve, cap, rotor, wires & possible also a coil depending on its integrity. is this a points system? if so give it a set of points & condensor. I myself recommemd Delco for everything except the plugs. those I say go with a set of 25 or 26 Autolites. I have my reasons for this, & none of it has to do with opinions. all based on experience & seeing the quality of parts these days. avoid the temptation to buy the high dollar whiz-bang high performance parts. unless you are running above 13:1 compression it is a waste of money. trust me, there is a science to this. then I would give the carb some in-depth tuning using a vacuum guage. this is all based on the assumption the mechanicles are in good shape (ie. compression, no vacuum leaks etc.) I forgot to mention why I suggest these steps. it looks like the engine is getting too much fuel & ignition system is not able to burn it. __________________ Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card

02-18-2005, 10:42 PM	#31
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	oh yeah, about the lower hose deal. is there a good antifreeze-water mix in it? is it possible the "coolant" was froze in the lower hose area & then when the engine warmed up & tried to move the ice it couldnt so the pressure blew the hose off? I have seen it happen. __________________ Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card

02-18-2005, 08:46 PM	#28
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	I personally wouldn't put Champions in my lawn mower. I use AC's in everything, even used them in my 6:71 blown Model A Ford (powered by Chevy). The plugs that you're running are probably fine, what condition are your valve seals in? Worn valve seals will play hell on spark plugs.

02-18-2005, 10:47 PM	#32
67ChevyC10Stepside Registered User Join Date: Mar 2004 Location: Butler PA Posts: 3,032	when the hose blew off it wasnt very cold....and it was just getting coolant put in...i know why the plugs were the way they are and im not going to mention why because you guys would laugh. __________________ 67 c-10, 400 SB, TH350, 4.10 gears, Blazer tank,camaro tach, sidemarker fuel fill (soon) WTB: stepside parts, 67 front end parts, 67 small window cab. posi for 3.73 or 4.10 for 12 bolt and 10 bolt.

02-18-2005, 10:55 PM	#33
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	go ahead, tell us why. we promise not to laugh. as for the hose thing...........PUNT! __________________ Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card

02-18-2005, 10:58 PM	#34
67ChevyC10Stepside Registered User Join Date: Mar 2004 Location: Butler PA Posts: 3,032	punt? __________________ 67 c-10, 400 SB, TH350, 4.10 gears, Blazer tank,camaro tach, sidemarker fuel fill (soon) WTB: stepside parts, 67 front end parts, 67 small window cab. posi for 3.73 or 4.10 for 12 bolt and 10 bolt.

02-18-2005, 11:17 PM	#35
Robert1970C20rstbukt Registered User Join Date: Jun 2004 Location: Beeville, Texas Posts: 1,943	Let me guess..........the hose clamp was loose? or was there even a clamp on the hose? I've seen that happen before. __________________ RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck

02-18-2005, 11:19 PM	#36
67ChevyC10Stepside Registered User Join Date: Mar 2004 Location: Butler PA Posts: 3,032	im not an idiot....it was on and i thought it was tight... __________________ 67 c-10, 400 SB, TH350, 4.10 gears, Blazer tank,camaro tach, sidemarker fuel fill (soon) WTB: stepside parts, 67 front end parts, 67 small window cab. posi for 3.73 or 4.10 for 12 bolt and 10 bolt.

02-18-2005, 11:25 PM	#37
68w/sbc406 Got Light Emitting Diode? Join Date: Apr 2004 Location: Newberg, OR Posts: 2,485	so whats up with the plugs __________________ 1968 1/2 ton 2wd lwb 6 lug disc and bags up front. Next c notch and rear bags '02 Chevy Silverado LT ext cab short bed 2WD 5/7 drop on 22's(the family car) 1993 Cherokee work ride/weekend wheeler

02-18-2005, 11:26 PM	#38
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	Champions get dirty too quick for my tastes. I like AC Delco. __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

02-19-2005, 01:35 AM	#39
mr402 Registered User Join Date: Jan 2004 Location: Elmira, Oregon Posts: 449	Stock ignition, Autolite. HEI Bosch.



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