Re: [Amc-list] intake question

[Tom Jennings <tomj@xxxxxxx>]

Personally, I've had really bad luck with silicones in engines over long 
periods of time. They seem to soften and swell near oil and heat. I no 
longer use them anywhere near petroleum products. They're supposed to be 
OK but not for me. And I'm usually pretty good about surface prep.

I'd used it before but got frustrated with the shelf-life of the unused 
portions, but Mark P. reminded me that "Right Stuff" is truly great. 
It's expensive, $12 at NAPA for a little can like spray cheese (that 
great American product (gag :-)) and within a week the can goes unusable 
no matter how careful I am. But if you can use the whole can (say head 
oil side and valve cover, water pump, water neck...) it's economical 
enough and WILL. NOT. LEAK. It's rubbery and totally fine around oil. It 
would be great for AMC V8 intakes.




Todd Tomason wrote:
> Steve,
> 
> So you're reinstalling the original cast iron intake?  I just follow the 
> gasket manufacturers instructions.  Felpro says to put a small bead of 
> silicone around each of the passages.  For a cast iron intake, use the rubber 
> end pieces provided with the gasket.  For an aluminum intake, Edelbrock 
> recommends using a thick bead of silicone instead of the rubber pieces.  I 
> think this is to account for the different expansion rates between cast iron 
> and aluminum.  
> 
> Todd
> 
> On Tuesday 12 August 2008 21:41, Steve wrote:
>> Hello Fellow AMC-ers:
>>
>>   Due to overheating issues (to eliminate the overheating problem, I've
>> decided that this is the best course of action and have considered other
>> courses of action) I want to R and R the original intake manifold off of a
>> '68 390 AMX, block off the exhaust crossover passages, and install an
>> electric choke on the original Carter AFB.  Any suggestions on the "R and R
>> and block off" parts of the procedure?  I've used a Permatex product to
>> seal off the thermostat housing (with gasket, of course) and was wondering
>> if I ought to use a similar product for the intake gasket.
>>
>>   Thanks,
>>
>>   Steve
>>   '68 AMX
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