Thanks Jeff, Mike, Now I am starting to worry. - For one reason that there is a special tool to insert the timesert. - 2ndly about the thread locker. On the other hand here are the details of what Napa gave me. "Napa Service Tools" Professional 900 Series 3/4" Long, 14 mm Spark Plug Rethread Inserts Instructions on rear: - Includes thread locking compound and 1 pair inserts - Use to replace damaged 14mm spark plug threads on aluminum head engines only. (not much else) The little packet of thread locker says: Permabond HM128 (must be this: http://www.permabondllc.com/TDS/HM128_TDS.pdf) Read MSDS and TDS before use (huh!). I put a picture on these items up here: http://picasaweb.google.com/syncronicity1/Timesert old on the left, new on the right. They look identical. I read a bit on the timesert site, and it looks like this NAPA repair kit isn't quite the same. For example timeserts seem to have this special thread structure to lock it into place using their installation tool. This part doesn't have that. And the description of the thread locker stuff HM128 doesn't seem particularly exciting. yes, the old and new parts look the same, but that doesn't mean the old part was correct. So a question, does the Vanagon spark plug hole have a tapered or square seal at the top? Could this old "timesert" thing be the source of low compression if it was incorrect? A couple of compression tests several months ago showed this cylinder low (can't recall the number, the rear one on the driver's side). So, Thanks for all the help. I don't want to screw this up, any further insights much appreciated. Roland
Sun, May 2, 2010 at 10:36 AM, Mike S <mikes@flatsurface.com> wrote: > At 12:49 PM 5/2/2010, Roland wrote... > > Went to Napa and got a new timesert (actually the Napa brand product), >> some >> thread locker material came with it >> > > A real Time-Sert does not depend on any sort of thread locker, it gets > expanded when properly installed to lock it into place. > > I would not trust any thread locker to work at cylinder head temperatures. > The vast majority are simply modified technical grades of cyanoacrylate > (super glue). Heat is what is used when the "permanent" types need to be > removed. > > |
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