[John Rogers]

I had that happen many, many years ago. Since I was working in my garage at home I took the engine to a well know VW engine race shop which mentioned this happens a lot on the engines used in off road race cars. It took them about 10 minutes to get both broken studs out and they took a grade 8 bolt slightly smaller then the broken ones and used the bolt as a welding electrode and welded it to the piece of stud. Waited a couple minutes and backed then both out. I had not used any Locktite but the heat would have loosened it anyways.

I would not try this but find a shop, either a VW repair shop or machine shop that could do it. Back then my fix cost $5.00!