By Mike Beiergrohslein (400mcs) on Wednesday, October 03, 2001 - 02:09 pm: Edit

JUST WONDERING CAN THEY BE WELDED?? I HAVE A CRACK ABOUT 2-3 INCHES ON THE RIGHT SIDE. THERE ALSO SEEMS TO BE A KNOCING SOUND WHEN THE ENGINE IS STARTED COLD, BUT DISAPPEARS WHEN HOT, ? POSSIBLY RELATED TO THE CRACK,
THANKS
97 DISCO

By Robert Mann (Oldscout) on Wednesday, October 03, 2001 - 02:21 pm: Edit

Cast Iron is a real PITA to weld. You will need to replace it.

By Kyle on Wednesday, October 03, 2001 - 02:22 pm: Edit

Knocking could be due to a few things. Yes the manifold can be welded by first drilling a hole at each end of the crack. Then a gouge must be ground down the length of the crack. The gouge can then be filled with weld but has to be done slowly. If its done that way it will be good as new. If not it will just crack again..


Kyle

By Kyle on Wednesday, October 03, 2001 - 02:23 pm: Edit

Oh contraire robert...

Kyle

By Robert Mann (Oldscout) on Wednesday, October 03, 2001 - 02:55 pm: Edit

TIG MIG or Stick? What gas, what wire,rod?

By Kyle on Wednesday, October 03, 2001 - 02:57 pm: Edit

You can do it with any of them in that fasion as long as you take your time and do it slowly. Some put the stuff in an oven and warm it up but I never have. I hav done them with both a stick box and the mig. the key is to kill the crack by drilling it at the ends.

Kyle

By Chris Welch (Asigiam) on Thursday, October 04, 2001 - 08:11 am: Edit

I just brought mine to LR and had them fix it. Love extended warranties Mine was special. I had two exhaust manifolds, well after the crack grew all the way around.

By John on Thursday, October 04, 2001 - 08:30 am: Edit

Kyle is correct on drilling holes...you can get cast iron welding rod...or clean good and braze with brass rod. Actually brazing wont give you the crystaling like stick welding...wont ever crack or break at the weld...just clean the metal good by grinding the surfaces to weld to.

By Robert Mann (Oldscout) on Thursday, October 04, 2001 - 08:39 am: Edit

I never said it was imposable just a Pain In The Ass. So you spend $50 getting somebody to weld it for you or you get a new one for????
Nathan, you out there?

By Mike Beiergrohslein (400mcs) on Thursday, October 04, 2001 - 12:28 pm: Edit

$$203 DOLLARS FOR BRAND NEW FROM LR DEALER. HOW HARD IS IT TO REPLACE? IS THERE ANYTHING TO WATCH OUT FOR??

By Patrick Cox (Ncroverguy) on Friday, October 05, 2001 - 03:28 am: Edit

I just had this exact problem with my disco. The right side manifold had a small hairline crack, and when I cranked it up, it sounded like a big loud redneck muffler. After driving it for a few minutes it went away b/c the manifold heated up and the crack sealed itself. Had it replaced at my local shop for $300.

By Scott Bowden on Friday, October 05, 2001 - 03:37 am: Edit

There is also a process called spray welding. The manifold is cleaned as described before and a special torch with a powder canister is used to spray molten metal over the crack. This is probably a fancy type of brazing.

By Scott Tschantz (Scott) on Friday, October 05, 2001 - 06:59 am: Edit

Mike I got the passenger side from Nathan Crabtree for 140.00 a while back

Good luck Scott

By Pvt Joker on Saturday, October 06, 2001 - 04:29 pm: Edit

go to a junkyard and get one...unless it has a crack, they don't wear out....