Jim,
That is a great suggestion as we sometimes assume that is done.
Need to remind the machine shop.
> There is a modification that I do on the block where the smaller freeze
> plug blocks the end of the oil gallery. I pull that press in plug, throw it
> away, and taper thread the hole. Then, I screw in a threaded pipe plug
> coated with "the right stuff" or similar.
> ALSO, A WORD OF CAUTION HERE. Behind the large freeze plug, there is
> another threaded oil gallery plug. If you have had your engine "hot tanked"
> you need to be aware that machine shops will pull the existing plugs out of
> the oil galleries, and replace them with generic plugs. The plug on a 455
> industrial block has a .040" diameter hole bored through it to lube the
> distributor gears. Be sure that the plug in your engine has the hole, or
> your distributor gears are not long for this world. Same thing applies on
> the other end of that gallery. A small hole lubes the timing chain and
> gears.
> Jim Hupy
> Salem, Oregon
>
>
> > > On the rear of the 455 (facing the tranny and flex plate), is the pass
> > side screw in port the end of the pressurized oil galley? On the driver
> > > side, the distributor squirter is the end of the pressurized galley,
> and
> > it is a few inches inside of the rear wall and is covered by a freeze
> plug
> > > type end on the rear wall. The pass side is a screw in.
> > >
> > > Here is a pic
> > >
http://www.gmcmhphotos.com/photos/back-at-jims/p6969.html
> > > Thanks
> >
> > And the plug in there is a square socket. It is not 1/4 or 3/8 as that
> > would be too easy. If anybody needs to borrow a 5/16 square drive tool,
> I
> > made one.
> >
> > Matt
> > --
> > Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL,
> > GMCES
> > Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum
> > Brakes with Applied Control Arms
> > SE Michigan - Near DTW - Twixt A2 and Detroit
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--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502
