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#1 |
Registered User
Join Date: Jul 2001
Location: Munster, IN
Posts: 1,100
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Lower radiator hose Question.....
68 C-10
rebuilt 350 sb from a 72 monte carlo NOTE: motor mounts are INCORRECT, so the engine sits about 1-2" forward of actual true V8 position for these trucks ok - my lower radiator hose has been rubbin my frame... and i recently noticed it.... its been like this for a good five years, and i cannot believe i never noticed it before now.... i used a spare piece of hose to hold me over until i fix the problem.... here is a pic of the hose in position right now (looking down from over the radiator...... the hose i have now does not turn to the right enough just out of the radiator..... i need one with an immediate bend to the hose (i think)....
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68 C10 Red Step 350 my first child & main focus 58 3200 Apache LWB Step the upcoming project Last edited by jewels.; 05-12-2004 at 10:55 PM. |
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#2 |
Registered User
Join Date: Jul 2001
Location: Munster, IN
Posts: 1,100
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went to the parts store, asked for a lower radiator hose for either
1. 1969 350 V8 2bbl or 2. 1969 396 V8 4bbl the hoses were VERY different between the two, and i have no idea which one works.... they did not have the 350 version in stock, but could get it from the warehouse..... but i tried a dry fit for the 396 version, which appeared like the outline below (in pink).... the problem is --- that the bend on the hose is not quite 90 degrees, and i'm not sure how well it will fit into position -- the bend looks a little off..... so, can some of you snap some pics of your lower radiator hoses with your 350 engine's in place? keep in mind that my engine is sitting forward of its proper position by about 1-2", however, i dont think that should make THAT much difference on this hose.... can you post some pics for me or offer advice? thanks in advance! ![]()
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68 C10 Red Step 350 my first child & main focus 58 3200 Apache LWB Step the upcoming project Last edited by jewels.; 05-12-2004 at 10:56 PM. |
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#3 |
Registered User
Join Date: Jul 2001
Location: Munster, IN
Posts: 1,100
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here are some more pics.... for reference....
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68 C10 Red Step 350 my first child & main focus 58 3200 Apache LWB Step the upcoming project Last edited by jewels.; 05-12-2004 at 11:01 PM. |
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#4 |
Registered User
Join Date: Jul 2001
Location: Munster, IN
Posts: 1,100
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i was also wondering if it was normal for the frame rail to turn up slightly (just behind where the hose is rubbing).... there is a bolt hole there at the turn up.... does anyone know why this is there? is this a modification by a p/o?
thanks! ![]()
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68 C10 Red Step 350 my first child & main focus 58 3200 Apache LWB Step the upcoming project Last edited by jewels.; 05-12-2004 at 11:02 PM. |
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#5 |
Registered User
Join Date: Jul 2003
Location: Cypress, Tx
Posts: 4,005
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Jewels,
I don't know if this helps at all, but my 350 in the correct factory location lower hose rubs in that same spot. I got the hose protector that goes on a late model upper radiator hose and put it on the bottom hose. I think the protector was off an '88 upper hose. Hope this helps a little. Shawn
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1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE |
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#6 |
Registered User
Join Date: Mar 2004
Location: Burrton, KS
Posts: 35
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i had the same problem with my truck, we found one hose that would rub on the frame and another that would kink when put on. i decided to just put on one of those flexible rad. hoses from the parts store. i think they have different lengths. it's been on since last summer and haven't had ANY problems with it.
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#7 |
Registered Cruiser
Join Date: May 2002
Location: Las Vegas NV
Posts: 2,230
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heh-heh... This probably wont help much... Most of the radiator hoses that are available aren't specially tailored to fit these trucks. What I bought last time was a cut to fit generic lookin' hose. I didn't like the way it fit at all. The old hose fit great. I fashioned a similar hose protector ( which I will now refer to as a Jewel ) to keep the frame from sawing it in half. It'll do for now. Some day I'll have to drive around and hose shop 'till I find one I like
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I intend to live forever. So far, so good. |
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#8 |
Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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I can post a picture tomorrow, but your original hose looks right. Does the radiator have the lower outlet turned up at an angle?
Also, looking at the old hose it looks like if you trimmed an inch off of the hose it would help as the hose appears to be bowed since it is probably too long, (with the engine mounted forward). The frame is "flared" at the point under the hose, so it is factory. I just looked at a couple of our trucks and the hoses clear by almost 1/2". The way the hoses are on our trucks, if you trimmed a 1/2" off at the water pump, it would increase the clearance without affecting the way it works. Good luck! Jim |
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#9 |
Wiseass secured himself a BAN
Join Date: Nov 2000
Location: MOON!!!
Posts: 2,282
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I agree with Jim. If you cut off a little bit of the hose at the water pump, you may "tighten up" the hose.
A turn up of the frame. Sounds like the P/O had a fender bender at one point. Last edited by 67Fleetsidedream; 04-15-2004 at 09:26 PM. |
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#10 |
Registered User
Join Date: Nov 2002
Location: Kelowna B.C. Canada
Posts: 1,086
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I went through this @ 6 months ago, I went to my Chev dealer and they told me the hose was discontinued, went to all my auto parts retailers and no luck. I even tried to match one up (bent a coat hanger and followed the distance and angles from the waterpump to the rad) no luck. So I went with a "Coolflex" clone system (got it off e-bay) and it fits great and looks nice. I am running a 283 with a short waterpump, regards Doug
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#11 |
Registered User
![]() Join Date: Feb 2000
Location: Maquoketa, Ia/ Orr, Mn
Posts: 3,014
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the turn up on the frame is factory, not sure why it's there but every truck of ours has it. My hose rubs on the inner fender, not the frame, and I used a old hose cut in half to keep it from rubbing even though the parts store said the hose was the correct one.
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'51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com |
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#12 |
Chevy Freak
Join Date: Sep 2002
Location: Meadville, Pa.
Posts: 2,804
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Rad hose
I agree with Jim. I've cut a little off to shorten the hose and I've also turned the hose on the radiator (so the hose is turned up a little bit) before you tighten the lower radiator hose. Brian
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69 GMC SWB, 350 70 Chevy LWB, 350 55 chevy gasser, 461 73 Camaro, 496 67 RS Camaro, 406 64 Chevelle, 588 71 Nova, 565 67 Camaro, 461 |
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#13 |
Registered User
Join Date: Jan 2001
Location: Killingworth, CT. USA
Posts: 3,378
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The lower outlet on my radiator turns upward. I had my radiator shop install that neck from my old one on to the new rad they sold me because it wasn't available anymore new. If I do some "diggin" I could come up with a NAPA number for that hose if you want it.
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1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03) 1998 S10 short bed 2002 S10 Blazer 1942 Oldsmobile 1958 Massey Harris Pony 1951 Wife Killingworth, Connecticut May those who love us, love us, any of those who do not love us, may God turn their hearts. And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping. A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist. |
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#14 |
Registered User
Join Date: Sep 2003
Location: Ohio
Posts: 127
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a hose off a newer truck might work they have the bend she wants try 1980 305 gmc or chevy, I will take a picture an post it but the size might be different . measure your hose and tell me what it is.
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#15 |
Registered User
Join Date: Jan 2001
Location: Killingworth, CT. USA
Posts: 3,378
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For what it's worth here are the NAPA numbers for the upper and lower rad hoses I used on my 71 C10, V8 using the curved lower rad neck. # 7581 and # 7595.
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1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03) 1998 S10 short bed 2002 S10 Blazer 1942 Oldsmobile 1958 Massey Harris Pony 1951 Wife Killingworth, Connecticut May those who love us, love us, any of those who do not love us, may God turn their hearts. And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping. A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist. |
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#16 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Jewels, Mine is the same as yours with the added protection, looks like it is a common fix. When I had the rad done up for the one ton, I had them install the lower neck up about an inch higher than it was supposed to be, seems to have helped.
The pent section on your frame is stock, it should be on all 68 - 72's, but not 67's. It is a mod for big block clearance...fuel pump i think. |
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#17 |
Registered User
Join Date: Jan 2003
Location: Washington State
Posts: 8,834
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Both of my trucks are the same way...
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1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo |
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#18 |
Registered User
Join Date: Mar 2003
Location: Crescent City, FL
Posts: 492
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My 72, 71, and 68 are the same with all with V8s. They all got the shortened hose and the "old hose taped to the new one " fix.
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Bob 68 C20 Camper Special |
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#19 |
Registered User
Join Date: Jul 2001
Location: Munster, IN
Posts: 1,100
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guys, thanks for all the replies!
i will agree with many of you, that the hose can easily be put on to rub the frame rail...... but i'm sure that chevy didnt design it this way..... does anyone have a setup that doesnt rub the rail? i know no one would have an "original" setup (cause rubber doesnt last that long)... but if someone out there is restoring their truck to "original" condition, surely they would look for a properly designed lower radiator hose? maybe? i was looking for PICTURES of some NON-RUBBING hoses out there (prebent, not flex-hose)..... does ANYONE have somethin like this? again, thanks for the verification about this being a problem.... but as an engineer, i'm determined to SOLVE it! ![]()
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68 C10 Red Step 350 my first child & main focus 58 3200 Apache LWB Step the upcoming project |
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#20 |
Senior Member
Join Date: Jan 2000
Location: Cincinnati, Ohio
Posts: 1,492
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All of my K20s rub like that. My parts 72 Jimmy is the same too.
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#21 |
Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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I thought somebody posted on this subject before stating that the radiator is supposed to have the lower neck coming out of the radiator at an upward angle. This would be similar to Longhorn Man's fix where he had the shop install it up an inch.
For what its worth my lower hose has a piece of older hose protecting it too.
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#22 |
Registered User
Join Date: Aug 2001
Location: pell city,AL
Posts: 263
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I had the same problem, I took a wire and put it on the radiator side and bent it to the water pump.
I then went to the auto store and bought every hose that was close. now the hose that is on it barley touchs. I just put a slit down some rubber fuel line and added it to the frame just in case. I have the part number of the hose at home. if you need it I can get the number for you tonight. let me know. |
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#23 | |
Registered User
Join Date: Jul 2001
Location: Munster, IN
Posts: 1,100
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Quote:
thanks! ![]()
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68 C10 Red Step 350 my first child & main focus 58 3200 Apache LWB Step the upcoming project |
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#24 |
Formerly yellow72custom
Join Date: May 2001
Location: Austin, TX
Posts: 7,531
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I'm gonna have to check mine out and see if its rubbing now.....never knew of the problem. I've had the same hose on there for about 3 years though....
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'72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg |
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#25 |
Senior Member
![]() Join Date: Sep 2001
Location: Seattle, WA, USA
Posts: 5,817
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I use NAPA hoses, and they rub too. I can snap a pic of my hoses later today...
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'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. |
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