At 10:51 AM 9/22/00 -0400, David_Russo@channelhealth.com wrote:
>I started changing the glow plugs on my 6.2L diesel M1009.
>I got six of the eight to come out. The other two are too far gone to
pull out.
>How hard should I try to get these? Vice Grips? Hammer? Pry Bar?
>Or should I leave them alone and wait until the ends burn off (will that
happen
>eventually?)
>Any advice appreciated, as always....
>BTW it starts really well with six new glow plugs, and the ether assist
has been
>disabled, but it is still summer.....
Vice grips holding the plug - pry with a screwdriver and try and twist out
at the
same time. Usually works for most of the ones I have to take out, but
sometimes
it doesn't.
Here's something I make no warranties about, expressed or implied. Try at
your own risk:
If the damn plug simply *won't* come out, take the injector out of the
cylinder
affected, and rotate the engine until the piston reaches TDC. Turn the old
glow
plug out as far as you can with something like a 3/8" drive 3/8" deep
socket until
it won't go any more, then, making sure the threads are clear of the head,
break
it off where you can. Take one of the glow plugs you've already removed
(make
sure it's a 13G - because the civvy counterparts are too soft for the
following),
and grind off about 1/4". Push this modified glow plug back in the hole
you broke
the old one off in, and try and wind it in. If it won't go, grind off a
bit at a time
until it starts to bite.
The glow plug you've started to screw in will force the broken off stub to
begin to emerge into the combustion chamber (you should see it start to
protrude). When the stub comes out far enough to get a hold of, take
a suitable pair of needlenose or similar and extract the stub. Wind out
your modified glow plug and insert a replacement one - then move on to
the next.
This is a DEAD LAST RESORT operation, as your only other option is to
have the heads removed. Problems you may encounter are as follows:
1) The old glow plug remains will be wedged too firmly to be wound
into the combustion chamber by the method outlined above;
2) The ground-off glow plug may itself become misshapen and
hard to remove if you encounter 1) above;
3) The ground-off glow plug may break during the operation, leaving
you with two stubs to remove.
I've had to do the above to several HUMV's and CUCV's, and have
only encountered 2) and 3) once or twice. A few folks who've had
the heads off of their CUCV's and HUMV's have passed on that
there were a number of glow-plug remains rattling about in the
combustion chamber for god-knows-how-long, leading me to believe
that the Army simply broke 'em off, pushed the remains into the
combustion chamber, and left 'em to (hopefully) eventually be
expelled via the exhaust valve.
I've actually been thinking of finding someone with a lathe who could
create an all-metal copy of a glow-plug to use in place of the ground-off
variety mentioned above. I keep several different lengths of ground-off
13G's for use as described above, but the specialized tool would be
more effective, and certainly handier.
Andy Hill
MVPA 9211
Vancouver, B.C.
(we've had one HUMV with a damaged intake valve which looks as
though it may've had a glow-plug end jammed beneath it at one point.)
This archive was generated by hypermail 2b29 : Tue Oct 24 2000 - 20:55:36 PDT