If RB heads (413, 426 Wedge, 440) are like LA heads (273, 318, 340, 360) the exhaust manifold bolts go right into the water jackets. High temperature silicone or other sealer is the normal fix. It this was done correctly, it should have stopped the leak. If it's still leaking, the mechanic didn't get the sealer on all the treads thoroughly enough, or he didn't use a good enough sealer, or the manifold itself is leaking. I tore my hair out for the first five years I owned my boat with those damn cast iron, heavy, (82 pounds each!) leaking, rusting, ^#&*...@*% factory exhaust mainifolds. Then I spent a bit of money and went to hand welded stainless steel headers that weigh 14 pounds each and won't rust. If they spring a leak, they can be welded good as new. Spendy, but worth every penney.
John --- On Tue, 3/17/09, bushwood <[email protected]> wrote: From: bushwood <[email protected]> Subject: [UnifliteWorld] Exhaust manifold leak To: "UnifliteWorld" <[email protected]> Date: Tuesday, March 17, 2009, 12:39 PM Question about an exhaust manifold leak. Chrysler 440s, fresh water cooled. Exhaust manifolds were off last winter and gone through. There is an anitfreeze leak on the port engine, inboard side, rear two bolts on the exhaust manifold. I can see antifreeze seeping out from the bolt heads (they are tight) when cold. When started, seeping is still prevalent. I pointed this out to my mechanic who did the work and he said he was not surprised; that they were prone to this. He extracted the two bolts and his method was to apply silicone sealer on the threads and torque back down. Seems reasonable, except I am still seeing seeping antifreeze from the bolts. Any suggestions? --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/UnifliteWorld?hl=en -~----------~----~----~----~------~----~------~--~---
