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Old 03-04-2014, 04:32 PM   #1
acw
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Unhappy replacing engine gaskets

I want to replace all the gaskets on a 350 sb.
What gaskets do I need to use gasket cement?
Which ones don't need it?
Do I coat both sides of the gaskets?
Thanks.
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Old 03-04-2014, 04:53 PM   #2
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Originally Posted by acw View Post
I want to replace all the gaskets on a 350 sb.
What gaskets do I need to use gasket cement?
Which ones don't need it?
Do I coat both sides of the gaskets?
Thanks.
What year is the 350? The small block has a vast amount of options of gaskets to choose from. If it is a early block I suggest staying away from cork gaskets and use good Felpro fiber and silicone gaskets. I like to use a thin coat of perm-a-tex aviation sealant on the fiber gaskets and use a little RTV in the corners of the oil pan gasket and use RTV on the ends of the valley on the intake manifold. If your replacing the head gaskets you don't use anything on them.
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Old 03-05-2014, 08:00 AM   #3
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i agree. i use permatex ultra black on the intake manifold end gaskets and throw away the ones you get in the kit.
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Old 03-05-2014, 02:05 PM   #4
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The serial numbers are gone. Per the casting number, '77-'79.
Which side of the gasket should I apply the sealant?
Thanks.
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Old 03-05-2014, 03:18 PM   #5
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Old 03-05-2014, 08:50 PM   #6
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Go to your local chevy dealer and pick up some of their gray silicone commonly known as Gms. Everything that'* cleaned properly the gms wont leak. It lasts a lot longer than permatex, its tackier and sets up in 2 mins.
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Old 03-06-2014, 08:52 AM   #7
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Default replacing engine gaskets

Thanks to everyone. Lots of good info here. When I'm finished I'll sent along some pictures. Thanks again.
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Old 03-06-2014, 08:55 AM   #8
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i have had leaks come back with permatex but it was always when i used different ones other than the ultra black. i havent had one of those leak again.
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