Furnace Cement Exhaust Leak

Since the engine is in the car high temp furnace cement was used to fill the blind hole in the.

Furnace cement exhaust leak.

If you could find some fine stainless screen like used in some fuel filters it will make a nice reinforcement to make the cement a lot stronger. If your furnace exhaust pipe or flue pipe is leaking it can be a sign of a much bigger problem. Exhaust leaks are common when combining a manifold of this vintage with later cylinder heads. Before you start the process ensure that you have the right protective gear and follow the steps below.

Here s what to look for. Most repairs will not stick or seal if done over dirt and grime. Once you locate the leak use a steel toothed brush to scrub the area surrounding it. Well my father always used furnace cement on most any exhaust component that leaked manifolds pipes mufflers etc i dont think its realy the best thing but it did work surprisingly well on some of the old junk we have i usualy preffer to clean it up real well with a heavy wire brush on the grinder then use some copper based never seize on the surface put on very liberly seems to help alot with minor leaks unless theres actualy material eroded away in large areas rather than just pitting.

Jack up the car. Some engines have egr ports built into the head and that might be where the leak is. As a safety precaution ensure that the car is supported by a minimum of two supports. Since furnace cement is not an organic glue but rather a refractory glue it can handle the high temps the manifold will reach.

If it leaks water it could be leaking flue gases it needs to be taken apart and completely re done with new fittings. Scrub the area surrounding the leak with a steel toothed brush. Find the exhaust leak. Might try furnace cement.

Find the leaking area by imparting pressure on the tailpipe and. Will need to let it cure a few days so it is strong before you try to fire it up.