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#1 |
Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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i have a 72 custom/10 with a stock 350sb and a stock radiator and ill fill the rad up and the will truck sit for a day and i check the level it will be like 1in or more down and the engine didnt run or anything it just sits so what i want to know is if anybody has ever had this problem with the level in the rad dropping before and what it is or may be?????? oh and it does it if the engine runs or not
-steven
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-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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#2 |
Registered User
![]() Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,427
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Re: little help please
Well Theres Not Very Many Places It Could Be Going. It's Either Leaking Out On Your Driveway (you'd Probably Notice That) Or Going Out Your Exhaust (noticable Too) Or Air Is Working Out Of The Water Passages In Your Block & Being Replaced With Coolant Mixture. I Vote For The Water Passages.
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#3 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: little help please
are you filling it when its running hot and thermo open if so the 1inch low will be because the water shrinks when cold
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#4 |
Senior Member
Join Date: Nov 2005
Location: northwestern wi
Posts: 2,111
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Re: little help please
i agree with john but you could always put a presure tester on to see that your cooling system holds presure
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#5 |
Senior Member
![]() Join Date: Jul 2005
Location: MISSOURI
Posts: 3,256
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Re: little help please
heap was doing that same thing. Never did see any leaks. Kept adding coolant finally stopped being low. Like Said above for a possibility Air pushing out .Am sure that was my situation. Took several times adding to get it right after I changed out the heater core..
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#6 |
Just hang'n around
Join Date: Nov 2005
Location: Camano Island WA
Posts: 248
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Re: little help please
I always add the coolant, turn the engine on, let it get up to temp and as the thermostat opens the coolant gets circulated, at that time I add more coolant to the top. Then I shut the engine down. As the engine cools, the excess coolant will run out the overflow. I do one more cold check and top it off if need be.
All that said, the pressure check will tell you if you have internal leaks. Also, just for kicks, change your oil and check it for coolant.
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Driving a '68 Chevy C20 and a '93 Astro Van. Lots and lots of mileage that I deduct each year. |
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#7 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: little help please
Don't forget... per design, it is supposed to be an inch or so from the top.
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#8 |
Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: little help please
i add it when cold and it holds pressure cause when i lift the lever on the cap coolant squirts out the overflow and i havent seen any puddles under it or anything and i guess the exhaust could be possible but i dont think so cause i dont see alot of water spiting out the exhaust, you guys think it could be the head gaskets? i surely hope it isnt, Longhorn Man - how do i know if its part of the design or not? Thanks for all the help guys
-steven
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-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME Last edited by GREASEMONKEY72; 10-06-2006 at 07:30 PM. |
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#9 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: little help please
well, you mention now that there has been an overflow bottle added.... it should stay full if you have the right style cap. Remove your cap and look at the bottom of it... is there one O ring, or two? *O-ring...gasket...what ever*
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#10 |
Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: little help please
its got a gasket on the cap, and i checked it tonight while the engine was warm and it was full so i think i either need a new cap with a higher pressure rating or just a new cap period
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-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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#11 |
Nothing fits but the oil
Join Date: Mar 2003
Location: Gaston, Indiana
Posts: 424
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Re: little help please
Since you have a stock radiator, look on the back side I think where the trans cooler lines would go and you will see a "fill line" marking stamped into the rad. I ignored that for years, and for years the coolant spit out until it setteled where the stamping mark was. I have given up the fight and have had no problems since.
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#12 |
Registered User
Join Date: Sep 2006
Location: Albuquerque, NM
Posts: 30
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Re: little help please
The only way to completely purge the air from the radiator is by using a coolant recovery bottle. Air and coolant are pushed out into the bottle when its hot and only coolant is drawn back in from the bottle when it cools.
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