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Old 03-22-2011, 07:33 PM
How fast is fast enough?
 
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rtv instead of gasket?

Okay so I'm in a dilemna. I can't find an off the shelf gasket that fits my needs. So my options are to modify an available gasket to work (just add bolt holes is the correct location) or I could install it with no gasket and just rtv.

Its a sbc, vortec heads non vortec intake that has been redrilled, edged are just too short to cover upper edge of coolant crossover on the gasket but it covers the actual port on the head. Thinking of maybe modifying a small race port gasket since the coolant crossover port is smaller. The vortec gasket I tried in the hard plastic one with the red o-ring from felpro. 90131. The one I may modify is 1206.

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Old 03-23-2011, 06:23 AM
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I would try to modify the Felpro. You would be taking a big chance with the RTV not leaking and having to do it all over again. JMO
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Old 03-23-2011, 06:34 AM
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i would get a summit intake for vortec heads there practically free at $129

not only will it come with the correct gaskets but it will make more power as the intake ports will line up properly.

dont risk a coolant leak into the engine antifreeze crystallizes in oil and will destroy the bearings
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Old 03-23-2011, 07:34 AM
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I would stay away from the no gasket/rtv route

Modifying another gasket is pretty straight forward with an xacto knife. The 1206's are pretty thin around the top of the ports, not sure it gives you much wiggle room. While I prefer FelPro's I find that Mr Gasket gaskets lend themselves better to cutting than FelPro's. They tend to be a little softer.
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Old 03-23-2011, 08:06 AM
How fast is fast enough?
 
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I may go with 136G gasket from Mr. Gasket, or I may just pick up a sheet of gasket material and cut the whole thing myself, either way it looks like its a no go for just RTV.
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Old 03-23-2011, 01:36 PM
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I was thinking about that the other day, rather then using exacto knife to cut isn't there some sort of sharp edge punches a guy could use that would leave nice round holes?
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Old 03-23-2011, 01:45 PM
How fast is fast enough?
 
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Quote:
Originally Posted by Coolball
I was thinking about that the other day, rather then using exacto knife to cut isn't there some sort of sharp edge punches a guy could use that would leave nice round holes?
a section of pipe with the outer edge ground to a sharp edge.
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Old 03-23-2011, 02:05 PM
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Use a felpro #1255 its nice and thick, has both intake bolt patterns and the openings match the vortec heads.
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