I talked with a tech at B & J Manifolds today and he also said it was common for the 440 to have this leak as the bolts are going into the water jacket. His recommendation was to also put sealant on the threads, let it dry overnight and then refill the system with antifreeze. Will give it a try and keep you posted. Thanks for the replys.
On Mar 17, 4:43 pm, john hamilton <[email protected]> wrote: > 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 -~----------~----~----~----~------~----~------~--~---
