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07-03-2009, 08:54 PM
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#1 |
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Registered User
Join Date: Jun 2008
Location: Norway
Posts: 90
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Head-ache
Just completed a headswap on my 350sb. Fired up last night, but could not get it to run properly. Found out today all my cylinders are flooded with cooling water. What have I done wrong? My new heads are Brodix spec alu heads. The heads are used, but I doubt they are cracked up.
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67 c10 Short Step 350/th400 daily driver 69 Camaro work in progress 
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07-03-2009, 09:13 PM
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#2 |
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Registered User
Join Date: Feb 2007
Location: Cali Central Coast
Posts: 5,191
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Re: Head-ache
That's not good. Head gasket failure? Someone will chime in.
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'67 SWB Fleetside ZZ4/350/Tremec 5-speed/4link/Scott's IFS - and fun as heck! SOLD  Click here to support the board Philippians 4: 6-7 |
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07-03-2009, 10:06 PM
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#3 |
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Formerly- 1972SuperCheyenne
 
Join Date: Oct 2008
Location: Wake Forest NC
Posts: 5,782
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Re: Head-ache
Any used head needs to go to the machine shop to be pressure tested and resurfaced. Especially aluminum heads that may have been overheated in the past. Hope you get it figured out.
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--Josh My Build Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=799218 A good crossthread is better than Loctite any day. Life is not about what you have, but who you have to share it with. |
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07-03-2009, 10:16 PM
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#4 |
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What?
Join Date: Jun 2007
Location: Southern California
Posts: 7,617
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Re: Head-ache
I totally agree with sending them to the machine shop first.
With Aluminum heads, as yours they could be warped so bad that they don't seal well even after being torqued down.
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Chris 1968 K20 Suburban 1972 K10 LWB PU |
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07-03-2009, 10:16 PM
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#5 |
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My Carbon Footprint
Join Date: Oct 2008
Location: Orygun
Posts: 5,527
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Re: Head-ache
What kind of gaskets did you use? Aluminum heads use a special head gasket. What torque sequence/pattern/poundage did you use?
To have water in all of them isn't good. Did you know any history of the heads? Did you get them from a friend....stranger..etc?? Last edited by prostreetC-10; 07-03-2009 at 10:16 PM. |
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07-04-2009, 12:11 AM
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#6 |
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Registered User
Join Date: Aug 2008
Location: Des Moines, IOWA
Posts: 109
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Re: Head-ache
Thats why i dont use alum heads. Well i love how they perform i just dont want to relace them if my truck gets hot.
And yeah where did you get them? Could be warped, cracked anything. Send em to a machine shop.
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1969  c20 350/th350(shift kit) A/C cab custom headers and exhaust1972  c10 307/th350 (wrecked) possibly selling
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07-04-2009, 02:23 AM
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#7 |
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Big Red - Now its a SWB!
Join Date: Jun 2009
Location: Oroville, Ca
Posts: 1,624
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Re: Head-ache
that sucks. I learned this the hard way too, I had an old taurus (notorious for overheating, blowing head gaskets, warping heads). It had water in the oil, so I pulled the heads, swaped gaskets, bolts, etc, come to find out when I fired it up it had low comp on two cylinders and water in the oil. So pulled them off again and sure enough they were warped up good, so I had them resurfaced and then they sealed up right. So now I take the heads to the machine shop every time.
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68 3/4 ton (Project)-350 Small Block, .030 over, 10:1 comp, 3998993 heads, C3BX edelbrock intake, comp cams XE268, Holley 670 SA, long tube headers, dual flow 40's, E-fan, Alum rad, currently under the knife getting shortened and bagged  build thread41 3/4 ton (wife's)-flatbed, fully restored to original01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's |
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