overheating....help! - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67cst · 02-15-2007, 07:18 PM

right on, good information-thanks jason

RACINJASON22 · 02-15-2007, 07:21 PM

Anytime I learned some of this stuff the hard way. If I can, I would like to save some one the headach.

67cst · 02-15-2007, 07:26 PM

one last thing, what is the average temp a sbc runs at? i guess a lot depends on climate outside etc but if im around 200f right now when its feburary i wonder what it will be like in july or august, at what temp would it overheat? or is that an open question too?

RACINJASON22 · 02-15-2007, 07:38 PM

200 seems real close to me Ive had some run 215 to 220 regularly (variables) will change alot cam, heads, compression and such. When your engine is healthy they don't seem to run too much hotter when the climate changes a some changh is normal though. Ofcoarse heavy stop and go trafic will change this. BTW guess it's time to get that factory gauge fixed.

neonlarry · 02-15-2007, 08:07 PM

One thing that comes to mind, was your temp gauge working before the new\rebuilt engine? If so was that with the same sending unit? If it's a new sending unit (on manifold vs head) you may have the wrong temp sending unit.

67cst · 02-15-2007, 08:13 PM

the temp gauge was working before with the old engine. this is a new sending unit. but identical to the old one in appearance (im sure that doesnt mean squat though). i wonder if there is more then one sending unit for that style sender?

neonlarry · 02-15-2007, 08:21 PM

Yes there is, common problem.

cooters · 02-15-2007, 08:45 PM

why is the gauge at 190 if you have a 160 thermo? I use high flow MR GASKET 160 thermostats, never use fail safe thermostats

02-15-2007, 07:18 PM	#26
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	Re: overheating....help! right on, good information-thanks jason __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

02-15-2007, 07:21 PM	#27
RACINJASON22 GEARHEAD Join Date: Jan 2007 Location: CENTRAL,PA Posts: 2,284	Re: overheating....help! Anytime I learned some of this stuff the hard way. If I can, I would like to save some one the headach. __________________ 72 SWB 2WD MY PROJECT 72 LWB 4X4 FUTURE PROJECT SUBSCRIBE HEREBOARD VENDORS HERE NORWOOD MEET SURVIVOR!

02-15-2007, 07:26 PM	#28
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	Re: overheating....help! one last thing, what is the average temp a sbc runs at? i guess a lot depends on climate outside etc but if im around 200f right now when its feburary i wonder what it will be like in july or august, at what temp would it overheat? or is that an open question too? __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

02-15-2007, 07:38 PM	#29
RACINJASON22 GEARHEAD Join Date: Jan 2007 Location: CENTRAL,PA Posts: 2,284	Re: overheating....help! 200 seems real close to me Ive had some run 215 to 220 regularly (variables) will change alot cam, heads, compression and such. When your engine is healthy they don't seem to run too much hotter when the climate changes a some changh is normal though. Ofcoarse heavy stop and go trafic will change this. BTW guess it's time to get that factory gauge fixed. __________________ 72 SWB 2WD MY PROJECT 72 LWB 4X4 FUTURE PROJECT SUBSCRIBE HEREBOARD VENDORS HERE NORWOOD MEET SURVIVOR!

02-15-2007, 08:07 PM	#30
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,745	Re: overheating....help! One thing that comes to mind, was your temp gauge working before the new\rebuilt engine? If so was that with the same sending unit? If it's a new sending unit (on manifold vs head) you may have the wrong temp sending unit. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

02-15-2007, 08:13 PM	#31
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	Re: overheating....help! the temp gauge was working before with the old engine. this is a new sending unit. but identical to the old one in appearance (im sure that doesnt mean squat though). i wonder if there is more then one sending unit for that style sender? __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

02-15-2007, 08:21 PM	#32
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,745	Re: overheating....help! Yes there is, common problem. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

02-15-2007, 08:45 PM	#33
cooters Senior Member Join Date: Oct 2006 Location: Edmonton Alberta Posts: 458	Re: overheating....help! why is the gauge at 190 if you have a 160 thermo? I use high flow MR GASKET 160 thermostats, never use fail safe thermostats



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