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Car Forum / Pontiac / Pontiac Fiero / January 2006Exhaust manifold question
How is the tubing part of the exhaust fastened/fitted to the cast flange that bolts to the head? Pressed? Welded? I bought a set of used manifolds on eBay and one of the flanges has a little bit of play. Other than that they are in good shape. Is this still useable as is? Is this considered cracked? Weld it? or should I peruse another replacement part. Thanks -- From the rocky shores of the Skykomish river David Bosworth http://www.premier1.net/~daveb/hovercrafts.html You can have them welded. I don't quite know what you mean by "a little play" > How is the tubing part of the exhaust fastened/fitted to the cast flange > that bolts to the head? Pressed? Welded? [quoted text clipped - 9 lines] > David Bosworth > http://www.premier1.net/~daveb/hovercrafts.html -- From the rocky shores of the Skykomish river David Bosworth http://www.premier1.net/~daveb/hovercrafts.html > You can have them welded. I don't quite know what you mean by "a little > play" It moves or rocks a little, not side to side but back a away (up the pipe) from the end of the tube but does not move forward past the opening to the head. Trying to weld stainless to a cast part seems odd to me. > > How is the tubing part of the exhaust fastened/fitted to the cast flange > > that bolts to the head? Pressed? Welded? [quoted text clipped - 9 lines] > > David Bosworth > > http://www.premier1.net/~daveb/hovercrafts.html > How is the tubing part of the exhaust fastened/fitted to the cast flange > that bolts to the head? Pressed? Welded? [quoted text clipped - 3 lines] > as is? Is this considered cracked? Weld it? or should I peruse another > replacement part. They're welded. Not done really *well*, but... :) Bolt them to a head (no gasket) and weld around the edge. Then have them relieved inside (look in the tube - it's pretty obvious). They are also stainless steel, so you'll have to have them tig'd if you don't have a tig welder yourself. John Stricker >> How is the tubing part of the exhaust fastened/fitted to the cast flange >> that bolts to the head? Pressed? Welded? [quoted text clipped - 9 lines] > Bolt them to a head (no gasket) and weld around the edge. Then have them > relieved inside (look in the tube - it's pretty obvious). I am going to have it welded I guess, unless a cheap one manifests it's self over the weekend. I suppose I should find out what it will cost to have the work done first though, heh -- From the rocky shores of the Skykomish river David Bosworth http://www.premier1.net/~daveb/hovercrafts.html > They are also stainless steel, so you'll have to have them tig'd if you > don't have a tig welder yourself. [quoted text clipped - 14 lines] > > Bolt them to a head (no gasket) and weld around the edge. Then have them > > relieved inside (look in the tube - it's pretty obvious). > I am going to have it welded I guess, unless a cheap one manifests it's self > over the weekend. I suppose I should find out what it will cost to have the > work done first though, heh Tell the welder that the tubing is 410 stainless, he'll need to use 309 for his filler metal, and he'll need to bolt the manifold to a spare cylinder head to help keep it flat while he welds, otherwise the tubing will warp enough that the bolt holes won't line up and the manfold flanges won't seat against the head. After welding, find someone with a bench style belt sander and true up the flange faces, and while you're at it you should grind out the restrictino down inside two of the three ports on each manifold, you'll see it when you look inside the port, it's where the short tubes are welded to the main tube. Also, check that weld for cracks, especially on the front manifold, that's the most common place for the tubing to crack. That can be welded up at the same time. JazzMan  Signature********************************************************** Please reply to jsavage"at"airmail.net. Curse those darned bulk e-mailers! ********************************************************** "Rats and roaches live by competition under the laws of supply and demand. It is the privilege of human beings to live under the laws of justice and mercy." - Wendell Berry ********************************************************** -- From the rocky shores of the Skykomish river David Bosworth http://www.premier1.net/~daveb/hovercrafts.html > > I am going to have it welded I guess, unless a cheap one manifests it's self > > over the weekend. I suppose I should find out what it will cost to have the [quoted text clipped - 16 lines] > > JazzMan Had them welded up! turned out pretty good and I was pleasantly surprised that the guy removed the excess tubing in the four welded tubes because it bothered him that they would have been made that way (pporly). Even asked if they were for a Ford! heh. Of course this means that I have to replace them both now! thanks |
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