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12-16-2004, 01:10 PM
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#1 |
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Registered User
Join Date: Mar 2004
Location: Butler PA
Posts: 3,034
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i hate my truck.....
a couple nights ago i went out to adjust the valves and got it runnin decent so ran it up to like 2 grand for a little bit to warm it up good then let it idle at right about 1050-1100... it sat there for a while then it stalled and right after it stalled...the bottom radiator hose comes flieing off shooting however many gallons of hot antifreeze everywhere. what would cause that? i know the clamp was on tight because i checked it a couple nights ago. every time i fix one thing another one sh#$s out. im about ready to do this to it.
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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. |
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12-16-2004, 01:24 PM
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#2 |
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user # 2756
 
Join Date: Jun 2001
Location: Chesapeake, Virginia
Posts: 4,612
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Thermostat never opened?
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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm 
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12-16-2004, 01:30 PM
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#3 |
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Registered User
Join Date: Mar 2004
Location: Butler PA
Posts: 3,034
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it dont have one.....and the coolant was just barely hot enough that i wouldnt stick my hand in it for a while....i could touch it for a little bit though.
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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. |
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12-16-2004, 01:34 PM
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#4 |
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Account Suspended
Join Date: Mar 2001
Location: Virginia Beach, Va. U.S.A.
Posts: 15,320
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Hmmm, I know that you said it was tight but the only thing that would make it come off like that is it wasn't tight enough. I can't think of any other reason.
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12-16-2004, 01:33 PM
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#5 |
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Registered User
Join Date: Oct 2000
Location: St. Johns, Arizona
Posts: 2,660
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Yeah, sounds like a cooling issue to me. Thermostat is the first to look at, maybe a 37 year old radiator, maybe crud in the water jackets of the block, maybe the water pump...
400 small blocks run a little hotter anyway because of the siamese cyliders. You could ship it to me and then you wouldn't have to worry about it anymore! 
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my 2¢ - t.i.o.l.i. Bowen 1968 K20 fleet 1969 K10 swb fleet 1972 K10 Suburban 1972 C10 lwb step 1992 K1500 'burb 1995 K2500 'burb 1997 C1500 'burb 1999 K1500 2000 K1500 'burb Why do I own so many Suburbans? |
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12-16-2004, 01:35 PM
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#6 |
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Registered User
Join Date: Oct 2000
Location: St. Johns, Arizona
Posts: 2,660
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Oh, didn't see your last post, my first guess would be a bad fit on the hose. Maybe it's a little big and even though the clamp was tight, it wasn't actually tight. Maybe the hose is too short and the tension pulling on it helped work it off...
Just where I'd start.
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my 2¢ - t.i.o.l.i. Bowen 1968 K20 fleet 1969 K10 swb fleet 1972 K10 Suburban 1972 C10 lwb step 1992 K1500 'burb 1995 K2500 'burb 1997 C1500 'burb 1999 K1500 2000 K1500 'burb Why do I own so many Suburbans? |
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12-16-2004, 01:38 PM
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#7 |
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Registered User
Join Date: May 2003
Location: shawnigan lake b.c. canada
Posts: 287
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is it a new clamp?
if not put a new one on.
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who says moneys not everything....try running a rat! |
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12-16-2004, 02:07 PM
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#8 |
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Young Gun wth Fast Inline
Join Date: Jan 2002
Location: Idaho
Posts: 1,475
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Could you have blown a head gasket? I wouldnt think so, but i know some bigger engines will blow the radiator hose off when they break a head gasket internally.
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1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!! |
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12-16-2004, 03:01 PM
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#9 |
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Registered User
Join Date: Nov 2004
Location: MINERAL WELLS WV
Posts: 143
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(quote) I hate my truck.. Sir put the wrench and hammer down and step away from the truck! Sir I said step away from the truck! j/k Hope you get it figured out. I would think that it takes a good bit of pressure to just blow a hose off. Why did you need to adjust the valves? Was it running real bad? Did it start running bad all at once? Is there a chance that it blew a head gasket and is pressurizing the cooling system?
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12-16-2004, 10:32 PM
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#10 | |
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Still drivin' a Rat Rod
Join Date: Sep 2004
Location: Monett Missouri
Posts: 4,925
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Quote:
It had a blown head gasket.On a good note,both the heads,and block were in fine shape,and didn't even need surfacing 
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Rusty Member #13872 Instead of saying.....you are a discomfort in the back of my front.....one should be able to say...... you are a pain in the *a$#* 71 GMC LWB 49 Chevy 85 Chevy G20 Check out my website |
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12-16-2004, 03:20 PM
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#11 |
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MOVE OVER
Join Date: Jun 2002
Location: Warrensburg, MO
Posts: 5,470
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I was thinking the same thing as stelth, I had a cougar that did the same thing, blew off the lower raditor hose,, then the raditor blew a leak,, finally found out it had a blown headgasket,, (it really didnt blow white smoke out the tailpipe till later),, the pressure of the leak blew off the hose, parked it now the engine is water locked...
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No matter where you are..... There you are... Buckaroo Banzi |
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12-16-2004, 07:55 PM
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#12 |
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Registered User
Join Date: Mar 2004
Location: Butler PA
Posts: 3,034
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here it is the head gaskets are new......everything except the block is new.
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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. |
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12-16-2004, 08:38 PM
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#13 |
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Registered User
Join Date: Jun 2002
Location: central pa
Posts: 1,525
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Personally I never could get them tight with a screw driver always use a ratchet and never had a problem. I would turn them tight as I could with a driver and the ratchet will always get them tighter. If the head gasket went I would expect it to be hot even with out a thermostat, and I would expect it to blow when he had the rpms up on it. Put it back on and run it again and see what happens. With no thermostat it will never really heatup around here.
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72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne |
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12-16-2004, 09:22 PM
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#14 |
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Registered User
Join Date: Apr 2004
Location: The Other Maine!
Posts: 2,236
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With no thermostat will cause overheating on some engines due to coolant flowing too fast to cool off in the radiator. I would suggest installing one correct for the season.
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1968 Chevy 4x4 307 4 speed |
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12-16-2004, 09:42 PM
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#15 |
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Got Light Emitting Diode?
Join Date: Apr 2004
Location: Newberg, OR
Posts: 2,485
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when i did my engine swap i kept getting leaks on the lower hose, w couldnt get the worm drive style rad hose clamp tight enough, i striped out 2 of them. then i went to napa and got s different style and the problem was gone. i reefed the $h!+ out of them and no more leaks, something you might want to try
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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 |
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12-16-2004, 10:30 PM
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#16 |
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Registered User
Join Date: Mar 2004
Location: Butler PA
Posts: 3,034
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well i think it's the head gasket.....it ran like sh@% blows smoke and has pressure in the hose.....i tried to get that rad hose off for like 35 minutes the other night....i pulled it yanked it tried twisting it used a screwdriver a hammer everything and it wouldnt budge so i said screw it and put the clamp back on. then it blew itself off...the fin truck hates me.
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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. |
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12-16-2004, 10:59 PM
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#17 |
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Registered User
Join Date: Mar 2004
Location: Butler PA
Posts: 3,034
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the heads have been decked already and the block is a virgin block in real real nice shape so i should be good for that....how much do 400 head gaskets run? anyone know? it's been a while since i bought these. this kinda pisses me off though...:'(
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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. |
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12-17-2004, 01:13 AM
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#18 |
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Got Light Emitting Diode?
Join Date: Apr 2004
Location: Newberg, OR
Posts: 2,485
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i bought mine for $16.95 a side (felpro) might be a dumb question, but, are you sure that the head gaskets were for a sb400 and not a 350, cause then you would block the steam holes, but i think you knew that iirc from other conversations
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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 |
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12-17-2004, 01:24 AM
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#19 |
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This, is my BOOMSTICK!
Join Date: Oct 2003
Location: Berlin, CT
Posts: 1,310
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Ahh yes, Our trucks, it is a love hate relationship.
Sorry, I have no advice. Just listen to all the guys above, at least they know what they are talking about.
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Larry Got rid of my projects for now. 1980 Jeep CJ7 1998 Nissan Sentra (my car) 2001 Toyota Sienna (wife's, of course) |
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12-17-2004, 01:23 AM
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#20 |
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10/30/19
Join Date: Aug 2004
Location: ottawa kansas
Posts: 5,244
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With the information given,my guess is that Mike Files is correct.
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12-17-2004, 02:06 AM
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#21 |
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Registered User
Join Date: Mar 2004
Location: Butler PA
Posts: 3,034
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the temp has nothing to do with it....as i said before i could stick my hand in the coolant......it wasnt that hot. im sure they were 400 SB head gaskets yes....i have a set of 350 ones here still...you know i am in school to become a technician and i built this all from nothing and know a lot about this.....and i noticed the white smoke but it never crossed my mind. i feel so stupid right now.
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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. |
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12-17-2004, 02:08 AM
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#22 |
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Still drivin' a Rat Rod
Join Date: Sep 2004
Location: Monett Missouri
Posts: 4,925
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It all good man,Money will fix it
__________________
Rusty Member #13872 Instead of saying.....you are a discomfort in the back of my front.....one should be able to say...... you are a pain in the *a$#* 71 GMC LWB 49 Chevy 85 Chevy G20 Check out my website |
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12-17-2004, 02:10 AM
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#23 |
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Registered User
Join Date: Mar 2004
Location: Butler PA
Posts: 3,034
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also the other night i ran it for maybe a minute tried taking the cap off and there was a SH%$ load of pressure in there....finally got it bled off and tested the antifreeze and when i sucked it up it was completely white from air bubbles.
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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. |
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12-17-2004, 11:24 AM
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#24 |
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Registered User
Join Date: Nov 2004
Location: MINERAL WELLS WV
Posts: 143
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Ok! Now that I see you have a 400 and that you said you had 400 head gaskets. Do you have 400 heads or did you have the steam holes drilled into the heads if they are not 400 heads? A 400 has such a small area between the cylinders that the gaskets are thin and blow easy when the steam holes are not present. I have had to drill the holes in heads by using the gasket as a template and center punch the holes then carefully drill them out. I don't remember the size of bit that I used.
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12-17-2004, 11:32 AM
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#25 |
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Registered User
Join Date: Nov 2004
Location: MINERAL WELLS WV
Posts: 143
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Just done a Google search for (drill steam holes 400 heads) and came up with the drill bit size for the steam holes 1/8" This is a common mistake when someone bulids a 400 because people are told all their live that a small block chevy are all the same and they forget about that "BIG" redheaded bastard stepchild of the small block family, the 400.
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