FAQ |
Members List |
Social Groups |
Calendar |
Search |
Today's Posts |
#1
|
||||
|
||||
Cracked exhaust manifold flange - Weld or??
While priming, I noticed we cracked the exhaust flanges when installing the new studs. Stock rebuild, 72' 400 with mild cam. Nothing exotic, I drive this car an average 2000 miles per year.
Can I use as is? Or should I weld? Pretty sure they will hold, but need opinions. I was ready to paint and install tomorrow, welding would hold me back for a few days... |
#2
|
||||
|
||||
There can be a fair amount of stress on the flanges as your engine will rock/flex against the exhaust system. I would definitely have the flanges repaired. In the past I have had decent results brazing cast iron manifolds.
Sent from my SM-G965U using Tapatalk
__________________
68 Firebird-- Street/Strip - 400/461 Eagle Forged Bottom End & Ross Flat top pistons. KRE 325 CFM D port, Ultradyne 263/271 @.050, .4267 lift. Crower Solid roller lifters and 1.65 stainless rockers. Quickfuel 1000 on Torker2 intake and 2" open spacer. Hedman 1.75" headers. TH400 w/brake. Ford 9" w/3.80 gears & 28x9 Hoosier pro bracket drag radial. Best ET: 1.35 60ft, 6.29 @ 107.20 mph, 9.99 @132.33 mph. 3,300 race weight |
#3
|
||||
|
||||
Don't run with the cracks... repair them. Or, put on new exhaust manifold(s).
__________________
Gary Get in, ShuT Up, Hang On! Member of the Baltimore Built Brotherhood MY GTO built 4th Week of March 1966 "Crusin' Is Not A Crime" Keep yer stick on the ice. |
#4
|
||||
|
||||
I'll get them fixed. I hate setbacks. You know how it is..
But, better be safe than sorry. |
#5
|
||||
|
||||
Repair can be done. Use a high nickel weld filler. Grind out the crack. Get the manifold to 600-800 degrees and keep hot while welding. When welding is done embed in vermiculite and let it slow cool.
|
Reply |
Thread Tools | |
Display Modes | |
|
|