Re: IML: 440 intake leak?

[sosmi@xxxxxxxxxxx]

Chris, the valley pan gasket, is a one time "crush" type gasket. After years of engine heat- cool cycles, and the bolts loosing torque, intake leaks are not un-common, sometimes it permits oil to be sucked in from the bottom of the intake ports, adding to excessive oil consumption.The factory sealer on the intake was PERMATEX AVIATION gasket sealer, and PERMATEX #2 in the corners, and bolt threads.I still seal intakes the same way.Sometimes after a rebuild, or valve job, the heads maybe resurfaced, then the intake will not seat at the proper angle, the intake must also be machined to maintain the proper angles.If your engine is stock, then a gasket, and re-seal should do it. Just be sure gasket surfaces, are clean, clean, clean! One final note, I don't like silicone sealers, most times it is over applied,it doesn't seal to oily surfaces, and falls off inside the engine, then it ends up in the oil pick-up screen adding to the restrictions.Ya'll have a nice day, Dave.

 

> -------------- Original message -------------- 
> From: "Chris Strohmeyer" <chrisstroh@xxxxxxxxxxx> 
>
> > I have my intake off because of a suspected vacuum leak. Is there anything 
> > I should look for on the manifold or the engine that might reveal an intake 
> > leak? Should I or can I use a sealant on the intake ports to be sure I get 
> > a good seal? Looks like the gasket and valley pan are one piece aluminum. 
> > Has anyone had problems with these in the past? 
> > 
> > Thx, 
> > Chris Strohmeyer 
> > 67 Imperial Convertible 
> > 
> > 
> > 
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