richards47deluxe Posted October 12, 2010 Report Posted October 12, 2010 does anybody know the size of the bolts that go up through the exhaust manifold and to the intake for a 218? I have 2 missing but i don't even want to try to remove for fear of breaking them. thanks. Quote
TodFitch Posted October 12, 2010 Report Posted October 12, 2010 On the 1933 it uses part number 317942 which is a 5/16-18 by 2 1/4 long cap screw. Not sure if they changed that later on.... Quote
richards47deluxe Posted October 12, 2010 Author Report Posted October 12, 2010 Thanks Tod. I guess it would have helped to mention it is for a 1947 218. But I am going to try those anyway. Quote
TodFitch Posted October 12, 2010 Report Posted October 12, 2010 Thanks Tod. I guess it would have helped to mention it is for a 1947 218. But I am going to try those anyway. I figured that. But I'm at work and my parts book is at home so all I had access to is the on-line data on my web site. I know the gasket between the two manifolds is supposed to be the same from 1933 through the 1950s, so the bolt diameter is probably correct. Don't know if they changed the length as they went through various manifold designs. Quote
Young Ed Posted October 12, 2010 Report Posted October 12, 2010 That sounds like the correct bolt size. However I would be HIGHLY surprised if you were missing those bolts. I suspect you'll find someone else has already broken them off for you. Quote
richards47deluxe Posted October 13, 2010 Author Report Posted October 13, 2010 Young Ed you are correct!!! they are broken. Now I need to think this out. All suggestions will help. Quote
Young Ed Posted October 13, 2010 Report Posted October 13, 2010 Here's what I would do. Pull the intake and exhaust as a unit. Get them somewhere you can work on them easily and heat the intake to get the remaining two out. Done this many times. Sometimes they still break. Typically they break with some bolt sticking out of the intake and you can cut a screwdriver slot in whats left and then with lots of heat get them out. 1 Quote
richards47deluxe Posted October 13, 2010 Author Report Posted October 13, 2010 Ed, That scares me. so afraid other bolts will break when removing. do you think I can drill out and re-tap? Quote
Young Ed Posted October 13, 2010 Report Posted October 13, 2010 I would only drill as a last resort. Its so hard to get perfectly centered with the drill. Quote
richards47deluxe Posted October 14, 2010 Author Report Posted October 14, 2010 all bolts off. flange bolts left. sprayed with concentrated kombucha tea should be loose tomorrow. thanks!! Quote
richards47deluxe Posted October 15, 2010 Author Report Posted October 15, 2010 both manifolds off, there were 3 broken bolts that keep manifolds together, used liquid wrench, let stand for 20 minutes. each bolt had about 1/4 inch exposed. used a stud extractor, ALL CAME OUT VERY EASY!!! no cracked manifolds. picking up gaskets from NAPA auto parts in the a.m., should be on the road by noon......THANKS FOR THE PARTS LEAD!! 1 Quote
seabee1950 Posted May 25, 2014 Report Posted May 25, 2014 FYI, If you have a bolt broken off and there is enough sticking out take a nut place it over the part sticking out and with a stick welder weld the inside full, then let it cool some, then back it out. The weld from a stick welder won't stick to cast. Seabee 1 Quote
Don Coatney Posted May 25, 2014 Report Posted May 25, 2014 On my Desoto engine I used bolts with nuts to assemble the intake and exhaust manifold. Quote
Young Ed Posted May 25, 2014 Report Posted May 25, 2014 On my Desoto engine I used bolts with nuts to assemble the intake and exhaust manifold. That is one area where the longer 6 really is better. The 23" ones have blind holes. VERY common to have broken bolts in there. Quote
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