sherwood3333 Posted July 20, 2015 Share Posted July 20, 2015 can any one tell me if you can remove the heat exhaust valve body without removing exhaust manifold first? I have a stuck flapper Link to comment Share on other sites More sharing options...
buick man Posted July 20, 2015 Share Posted July 20, 2015 Remove the header pipe from the exhaust manifold. Apply Map Gas ( The yellow can not the blue propane can ) to the exposed valve body and circulate the heat on the shaft and flapper. Get it reddish hot then let it cool. Apply your flavor or breaker juice to the surrounding area. Then come back the next day and repeat the heating process. On the second heating, have a pliers handy and a screw driver. Gently begin to apply leverage to the inside flapper valve and note any movement and begin working it slightly back and forth. Then let it cool and then apply Marvel Mystery Oil in a spray bottle and drench the entire inside and outside area. Pay attention to the coil spring. Do not attempt to move the spring or stop with your tool or fingers just get the MMO applied on to the spring and mechanism as well as the flapper shaft and the other outside end of the shaft. Then let it sit for 3 or 4 days. Come back and repeat the heat process. By this time the flapper will move more freely. Do not force, pry or in any way cause undue force on anything, What will happen each time, you will notice the flapper will move more and more each time you repeat this process until you have total free movement. This has been the only way we have been able to free a stuck flapper while not destroying the spring or shaft/flapper assembly. Be patient as it will free itself. Then when you get complete movement, apply MMO every day with a spray bottle for a week or so. Link to comment Share on other sites More sharing options...
sherwood3333 Posted July 20, 2015 Author Share Posted July 20, 2015 ok thanks, but I still want to know if I can remove valve and how by not having to remove the exhaust manifold Link to comment Share on other sites More sharing options...
old-tank Posted July 20, 2015 Share Posted July 20, 2015 What year car? Pictures?Actually you don't need it anyway unless regularly driving in cold weather with the same low volatile fuel that was available when the car way contemporary. Todays' winter gas is plenty volatile. When you do get to it rip it out!Willie Link to comment Share on other sites More sharing options...
sherwood3333 Posted July 20, 2015 Author Share Posted July 20, 2015 1949 248motor how do you get valve body off Link to comment Share on other sites More sharing options...
Bhigdog Posted July 20, 2015 Share Posted July 20, 2015 Best bet would be to get under the car and take a look at what's holding everything together and what might be in the way. Not even close to brain surgery............Bob Link to comment Share on other sites More sharing options...
sherwood3333 Posted July 21, 2015 Author Share Posted July 21, 2015 ok! got the valve body off, their was 1 bolt on the backside of the exhaust header that was the problem that was holding the valve body. ok next do I take the flapper out or should it stay in? Link to comment Share on other sites More sharing options...
Chasander Posted July 21, 2015 Share Posted July 21, 2015 I was able to cut mine with a dremel cut off wheel 1 Link to comment Share on other sites More sharing options...
Bhigdog Posted July 21, 2015 Share Posted July 21, 2015 If it's stuck fully open you can leave it as is. If it's stuck fully closed you can free it or cut it out. .....................Bob Link to comment Share on other sites More sharing options...
Joseph P. Indusi Posted July 24, 2015 Share Posted July 24, 2015 X2 what Bhigdog said. Joe Link to comment Share on other sites More sharing options...
buick man Posted July 25, 2015 Share Posted July 25, 2015 (edited) ok thanks, but I still want to know if I can remove valve and how by not having to remove the exhaust manifold…. just wanted to tell you how to make the valve functional once again so you would not have to remove the manifold….. If you remove the valve and shaft you will have to plug the holes in the flange and that would be a very tight maneuver at best so removing the manifold would be the best bet. - Guess your on your own from here. Let us know what you decide to do. Edited July 25, 2015 by buick man (see edit history) Link to comment Share on other sites More sharing options...
Bhigdog Posted July 25, 2015 Share Posted July 25, 2015 (edited) If you cut the valve out just leave the shaft in to plug the holes and it would still look original with the bob weight intact. Easy peasy.................Bob Edited July 25, 2015 by Bhigdog (see edit history) Link to comment Share on other sites More sharing options...
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