Guest btate Posted August 16, 2012 Share Posted August 16, 2012 I am not by any means a expert car person, so I will ask a question that I am sure to most simple. The heat riser in the exh manifold is it needed? I believe it is for cold morning warm up. Is that right and that it's only purpose. My mechanic remove it, so I could send off the manifolds to be coated and he ruin the spring by stretch it out in a straight line. Since I live in the South do I really need it? Thanks Link to comment Share on other sites More sharing options...
buick5563 Posted August 17, 2012 Share Posted August 17, 2012 No. Link to comment Share on other sites More sharing options...
Ben Bruce aka First Born Posted August 17, 2012 Share Posted August 17, 2012 No.Agree Ben Link to comment Share on other sites More sharing options...
D Yaros Posted August 17, 2012 Share Posted August 17, 2012 No, but you will definitely need something to fill up that space when all is put back together again. Link to comment Share on other sites More sharing options...
Guest btate Posted August 17, 2012 Share Posted August 17, 2012 we were just going to tap and tread it and hope we don't crack the cast iron. Then just install a bolt in the hold Link to comment Share on other sites More sharing options...
buick man Posted August 19, 2012 Share Posted August 19, 2012 Yes. They can be tapped using lots of oil and thread in a flush plug with sealer. Link to comment Share on other sites More sharing options...
D Yaros Posted August 19, 2012 Share Posted August 19, 2012 I guess I am still a little unclear here? If the heat riser is removed, will there not be a rather large-sized gap between the exhaust manifold and the exhaust pipe that needs to be closed? Would not seem to be enough free play in the exhaust pipe to seal that gap? Link to comment Share on other sites More sharing options...
Bhigdog Posted August 19, 2012 Share Posted August 19, 2012 Sounds like they are going to cut out the butterfly, remove the shaft, plug the shaft holes and use the valve body as a spacer...............Bob Link to comment Share on other sites More sharing options...
D Yaros Posted August 20, 2012 Share Posted August 20, 2012 Thank you for that clarification. Now I understand. Link to comment Share on other sites More sharing options...
buick man Posted August 21, 2012 Share Posted August 21, 2012 Well almost clarified. The shaft for the riser is well down in the body of the manifold and in ample space before the header flange end of the manifold that connects to the exhaust header pipe that in turn, connects into the front of the muffler. So when you remove the riser baffle and rod you have two holes which need to be filled. You tap them. Insert flush threaded plugs making sure to first coat threads with anti-seize paste. Most use a female hex head plug arrangement on the business end of the plug so you can use an ellen wrench to install and or remove later. That's where the anti-seize comes in. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now