Date: Sun, 2 May 2010 11:28:20 -0700
Reply-To: Roland <syncronicity1@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Roland <syncronicity1@GMAIL.COM>
Subject: Re: Found a timesert in the spark plug hole
In-Reply-To: <20100502173636.08445136087@hamburg.alientech.net>
Content-Type: text/plain; charset=ISO-8859-1
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.
>
>
