View Full Version : Another Rolls Royce Manifold......
06-03-2010, 07:41 PM
Here's another Rolls manifold I had come in from the import car dealer a few miles from me. This one was cracked & had a bad warpage that had to be re-ground on a surface grinder. I did the crack repair with the successful "Cold Welding Cast Iron With MIG" process I use exclusively now. I took the repaired manifold to the automotive machine shop my brother uses to get all his machine work done. They are superb machinists with impeccable quality & workmanship.
Repair: 309L, .030, 98/2(AR/CO2) @ 18cfh, 90A & using the pull technique(not push). Here's some pics(9)....gonna need (2) posts, so give me a couple xtra minutes to get them on. Thanks....
06-03-2010, 07:42 PM
Here's the 2nd group:
06-03-2010, 08:20 PM
What's that tube/rod inside the first port? How old of a Rolls is this (year?) I had a 312 Ford Y block I could have used your technique on for the front tang...epoxy didn't work!:o
I bought the wire for this technique, but have yet to pick up the gas...the shop will lend me a tank to try out the technique, but all they have is 92/8, and I would have to special order a 98/2 mix...which means I have to take a whole tank...but if it works, I have a ton (literally) of Cast iron "stuff" I can convert into art, so the tank will pay for itself in one sale. Would I get ANY results with either straight Argon, 92/8, or C25 with that wire?:confused:
06-03-2010, 08:37 PM
Would Tri-Mix work with your process.? 98/2 is an alternative to the tri-mix for welding stainless; but what about cast.??
06-04-2010, 08:01 AM
Hotfoot: From what I understand, the tube is some kind of heating transfer that goes to the carb or ???. The import dealer didn't know if it had a fluid thru it or just the heat transfer from the heat of the exhaust gas. I'll try to find out. I did an extensive read on Ed Craig's Weld Reality site & 98/2 is the best mix for these repairs, although indicated any mix thru 95/5 is ok. No more than 5% CO2. My LWS keeps a 40cf bottle for me on hand & made an exception for me cause I do all my business with them. They generally don't refill any bottles less than 300cf...... they have been very accomodating to me since I am a regular & have sent them new customers. From what I have read on many postings, most LWS locales are not accomodating at all & if you don't spend mega-$$$, you don't get any favors. I would not recommend any mix other than the mix ratio I have listed because of the success it has yielded. Ed Craig really knows his "sheet".
Urch: I don't know about tri-mix. The issue with the gas mix & SS wire is keeping the carbon content negligible & 309L & 98/2 is proven successful. I don't vary with success.
06-05-2010, 11:44 AM
Hotfoot: From what I understand, the tube is some kind of heating transfer that goes to the carb or ???. The import dealer didn't know if it had a fluid thru it or just the heat transfer from the heat of the exhaust gas. I'll try to find out.
I figure because of the location of the tube that it does not have fluid going thru it. The very high exhaust gas temps would boil any standard automotive fluid right out of there.
And I think such a tube with any fluid in it would be highly likey to spring a leak from corrosion and cracks.