Buddy of mine just picked up a 1996 Lumina with a 3100 that I'll say
has a "milkshake motor" ... oil color is gray/milky. Thinking UIM/LIM
gaskets here (would be typical for this motor). Just over 103k. Have
not pulled the plugs yet to see what they look like. Wondering if
there's anything else that we should be doing while digging down and
replacing them, and where's the best place to get replacements, and
what ones to get (Fel pro, factory, etc)

Thanks

-GV

Felpro makes the updated gaskets as well as GM, with new intake bolts and
torqueing procedure. If this has been mixed with the oil for a while the
crank bearings are at risk here.
"GlassVial" <glassvial (AT) NOSPAM (DOT) hotmail.com> wrote



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GlassVial <glassvial (AT) NOSPAM (DOT) hotmail.com> wrote in
news:j4122313p9m82mrt35tsihf208sceatv23 (AT) 4ax (DOT) com:

from your post i would ALMOST guarantee you are looking at lower intake
manifold coolant leakage.....if not sure 1)change oil. 2) run to full
warm and mark overflow tank. 3) drive normally for a week while checking
oil condition and level, and checking for coolant level decrease OFTEN.
there is always the possibilty the oil has been there forever and PCV
syaten not working and allowing water builup in oil. far fetched but
possible......as far as parts go = get updated lower gaskets, some need
bolts replaced/some dont, a decent GM parts man can take the last 8 of
VIN to tell the story on bolts. no matter what on the bolts, clean out
the bolt holes like new with carb cleaner as the locktite on bolts is
about the only thing that gives the repair a chance in hell of holding up
(very low torque)............when finished make sure and cuss the
engineers that came up with this POS design...........then move on. kjun
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LOL thanks for the info. Picked up the upper and lower from the
dealer today (along with some other gaskets he said the project would
need as well). Odd that autozone/pep boys/etc list a "revision 1" and
"revision 2" gasket set and the dealer only showed ONE version,
period.

LIM's don't really surprise me, my 94 had the same problem, and I've
read it's a common thing even on the 3800's (LIM/UIM). I'd rather be
fixing gaskets than replacing trannies (ford, fix or repair daily,
blech) or the whole damn engine (Chrysler 2.7L's 98-03 give or take a
few years)

-GV