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05-15-2012, 09:34 PM
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#1 |
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Registered Cruiser
Join Date: Mar 2010
Location: Mesa, AZ
Posts: 918
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Steam Line help...
I'm trying to figure out the best place to drill and tap for the steam line fitting in the new water pump for my 5.3. I've seen most tap into the "bubble" near the upper neck (mine has no bubble), and also have seen some tap into the water neck on the thermostat housing... What do you guys suggest with the Pump pictured below?
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77' Chevy SB Dropmembered Front and Rear 5.3/4l60e combo |
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05-15-2012, 09:53 PM
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#2 |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: Steam Line help...
Route it to the radiator tank like GM intended, Drilling a hole in that new water pump will void the warranty.
Any good radiator shop can solder a 3/8" brass hose barb in the tank, Im guessing your using the original Brass/Copper radiator? |
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05-15-2012, 09:56 PM
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#3 |
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Registered Cruiser
Join Date: Mar 2010
Location: Mesa, AZ
Posts: 918
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Re: Steam Line help...
I will be using a new alum rad., elec fans. Should I just have them add the fitting when ordering then??
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77' Chevy SB Dropmembered Front and Rear 5.3/4l60e combo |
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05-15-2012, 10:34 PM
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#4 |
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Senior Member
 
Join Date: Nov 2007
Location: Greenville, SC
Posts: 873
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Re: Steam Line help...
I got a Griffin radiator this week for my 65. It is set up for LS engines with the 1-1/4 inlet moved to the passenger side and 1-1/2 outlet. It came with a 1/8" pipe bushing welded into the top tank for the steam line. The LS1 book put out by GM says to route the steam line to the highest point in the coolant system, top of the radiator tank.
Good luck, TR PS My Champion radiator puked on me.
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1965 C10 SWB Fleet Two owner LS2 Swap Thread http://67-72chevytrucks.com/vboard/s...d.php?t=413880 |
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05-15-2012, 11:14 PM
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#5 | |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: Steam Line help...
Quote:
Yes, you can order a aluminum radiator with provisions. |
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05-16-2012, 12:20 AM
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#6 |
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Registered Cruiser
Join Date: Mar 2010
Location: Mesa, AZ
Posts: 918
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Re: Steam Line help...
Thanks for the reply's, big help guys!
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77' Chevy SB Dropmembered Front and Rear 5.3/4l60e combo |
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05-18-2012, 10:12 PM
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#7 |
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Registered User
Join Date: Sep 2009
Location: ottawa,canada
Posts: 4,550
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Re: Steam Line help...
I drilled mine on the back of the water pump outlet....
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my build threads '86 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415628 '67 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=635078 '63 GMC http://67-72chevytrucks.com/vboard/s...d.php?t=674682 |
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05-24-2012, 03:05 AM
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#8 |
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Registered User
 
Join Date: Jun 2006
Location: Maple Valley, WA
Posts: 1,913
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Re: Steam Line help...
Are steam lines only needed on fuel injected engines or on a carbed motor too?
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05-24-2012, 08:31 AM
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#9 |
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A guy with a truck
Join Date: Sep 2005
Location: Germany, for now
Posts: 5,921
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Re: Steam Line help...
Induction is of no consequence. The LS cooling system needs to be able to purge steam pockets. Since there is no coolant in the intake, the highest point of the system is the front of the cylinder heads; steam lines give it place to evacuate.
Posted via Mobile Device
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-Chris Instagram _elgringoloco_ '70 Short-Wide How to: Ruin a perfectly good C10 ‘70 Blazer ConversionHow To: Ruin a Perfectly Good 4wd '72 Highlander How To: Ruin a Perfectly Good K/5 (SOLD) '72 Blazer 2WD How to: Ruin a perfectly good Blazer (SOLD) '05 Yukon Daily Driven (not so stock) Yukon (SOLD) ‘07 Yukon Denali (daily) Members met list: SCOTI, darkhorse970, 67cheby, 67cheby'sGirl, klmore, porterbuilt, n2billet, Fastrucken, classicchev, Col Clank, GSFMECH, HuggerCST, Spray-Bomb, BACKYARD88, 5150, fine69, fatbass, smbrouss70, 65StreetCruiser, GAc10boy |
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05-24-2012, 09:26 AM
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#10 |
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Senior Member
  
Join Date: Oct 2011
Location: Wolfforth, Texas
Posts: 976
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Re: Steam Line help...
I took my aluminum radiator to the shop and had them add a 1/4" nipple to the top tank.
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Craig 1966 Chevrolet C10 - Supercharged LS3 1968 Chevrolet Camaro 1957 Chevrolet 2dr Hardtop "It makes sence if you don't think about it"  Mesquite 1966 C10 - LS3 W/ Air Ride http://67-72chevytrucks.com/vboard/s...=1#post4989763 |
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05-24-2012, 11:45 AM
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#11 |
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Registered User
Join Date: Jan 2012
Location: Virginia Beach, VA
Posts: 282
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Re: Steam Line help...
I drilled and tapped the top of my pump, about 1" to the right of the outlet. See pic in post #18 http://www.67-72chevytrucks.com/vboa...d.php?t=520516
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1972 C10 "Shop Truck" Build - EFI, 5-speed, Posi, and Patina http://67-72chevytrucks.com/vboard/s...d.php?t=834292 1957 Chevy pickup - Twin Turbo 5.3/NV3500, Jag IFS & IRS, AirRide http://67-72chevytrucks.com/vboard/s...d.php?t=606987 Check me out on YouTube - "Tiny Garage Fabrication" http://www.youtube.com/oneoffstroker |
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