Intake Manifold Water Leak |
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Greg73Oregon
Senior Member Joined: 23-February-2021 Location: Roseville, CA Status: Offline Points: 232 |
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Posted: 29-September-2021 at 10:27AM |
Strange!
I installed a Ford Performance Z2 head on my 1973 351W. My stock 2bb intake with EGR casting had 12 bolts. A friend gave me a 1970 2bb head that doesn't have the EGR casting. It has 16 bolt holes. Since there is no threading in the heads for the extra bolts, those intake bolt holes are open. Finished putting the engine together, cranked it - everything fine. Started filling the radiator, and coolant started coming out of the rear open hole (2nd to the last bolt) on each side. Any ideas? I thought I read somewhere that you have to tap the 2nd to the last hole, and install a bolt??? Thanks.
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GKF
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handsofstone
Senior Member Joined: 13-April-2018 Location: Northeast Status: Offline Points: 3946 |
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Any pics? Sounds like you are going to be pulling the manifold. It could probably be tapped in place but I would be hesitant to leave the cuttings in the engine. You have two different heads on the engine?
Edited by handsofstone - 29-September-2021 at 11:53PM |
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Greg73Oregon
Senior Member Joined: 23-February-2021 Location: Roseville, CA Status: Offline Points: 232 |
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A pair of Ford Performance M-6049-Z2
A very close examination of the ports (etc.) are exactly the same as the OEM head. I'm sure I would have the same issue if I had used the stock heads. After the leaks, it flashed on me that I remember reading somewhere to drill/tap the back 2nd from the last bolt holes, and install bolts in them. I just can't remember where I read it. The intake manifold p/n: D1AE-9425-CA |
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GKF
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californiajohnny
Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609 |
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69-74 351w had 16 bolts 75+ had only 12 bolts, either will physically interchange but i like the idea of having the extra bolts around the water passages... so i opted to find an offy intake with the 16 bolts
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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Greg73Oregon
Senior Member Joined: 23-February-2021 Location: Roseville, CA Status: Offline Points: 232 |
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Do you have a part number?
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GKF
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californiajohnny
Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609 |
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i don't! i bought it used on ebay years ago...
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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Rockatansky
Senior Member Joined: 30-July-2010 Location: On The Road Status: Offline Points: 6072 |
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here's a link to a copy of the Offy catalog
http://www.exeterautosupply.com/Docs/Offenhauser%20catalog.pdf |
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72 GT Ute
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