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#1
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exhaust leak blues
i just installed a rebuilt 74 360, with 72 j heads, & mopar performence headers into my 73 Duster. I bought a complete fel pro gasket set including "header gaskets". Looks like exhaust manifold gaskets to me. I installed them anyway. They leak anyway. Before I spend my money, who makes a good Mopar header gasket?. I will not tolerate leaks! Also, besides the factory 340 ones, does anyone make an aftermarket exhaust manifold?
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#2
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You can get "dead soft" aluminum or copper header gaskets from Jeg's or Summit. Before you buy those little $40 beauties try coating your gaskets with some red high temp silicone. A little bit will usually fix it, just don't put too much or it will squish out into the primaries around the flanges and just plain look nasty.
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#3
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I always use the SCI copper gaskets, and they never have leaked.
Also, when I'm building the engine, I have the exhaust ports milled flat, and also my header flanges. I also cut the header flanges between the front port and the middle ports, and between the back port and the middle ports. I don't like leaks, either. |
#4
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There are several versions of the exhaust manifolds. The ones that came on my 73 'cuda were plain logs, and I found a set of non-hp 71's that were a bit better. A step up is the hp manifold from a 70 or 71 (duster and dart hp of that year should be the same as cuda..). I have a set of non hp 71's that I fixed up, if you want, or you can shop e-bay for a real hp set from an AAR/T/A(maybe dart n duster have the same in those years, demon/gt model..)
These look more like the HP manifolds found on the big blocks, and are a definite improvement. If you want headers, try TTIHEADERS.com I hear these fit real well, and they will certainly yield more power than any manifold. The red goopy stuff, BTW really works. |
#5
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Gaskets
Try red high temp RTV, I know all RTV is high temp, but the red works great for me. $5.95 a tube.
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#6
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"Ultra copper"?
Never failed me?!?! |
#7
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Yeah, get the ultra copper, awesome.
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