Just (trying) to finish up this LIM gasket job on a 96 Lumina 3100
motor, thought I had the system all bled out and all, but when it
actually runs (drives, road test) the SOB throws a low coolant light
and eventually gets up to a hot light being on. Let me be clear here,
I have replaced:

LIM gaskets
UIM gaskets
fuel injector o-rings
every single coolant hose under the hood
water pump
thermostat (tested before install)
power-flushed out the radiator, flowed 100% clean with a pressure
washer (straight water, no chem, did a radiator swap too, didn't help)
heater core

Been trying to bleed out the system (with heat on high and blower on
1). What seems to be happening is the coolant is backing up into the
overfill reservoir, as if there's some sort of restriction somewhere
or air is somehow getting into the system?

I'm about ready to put bullet in this thing and put it out of its
misery, unless someone has some suggestions for me. Thanks.

-GV

Did you bleed it using the bleeder screws on thermostat housing and the pipe
above the wp? That's all I can think of unless it's head gaskets.



"GlassVial" <glassvial (AT) NOSPAM (DOT) hotmail.com> wrote

Yes and yes. Car isn't exhibiting any signs of head gaskets, no white
smoke from exhaust, no leaks we can find, oil is clean, etc.

-GV

A bad head gasket can pressurize the system blocking circulation but not
leak back into the cylinders, unusual type of failure but it can happen. If
it is air bound, try jacking up the car in the front and letting it sit o/n
with the cap off, also try bleeding it this way hot also.
"GlassVial" <glassvial (AT) NOSPAM (DOT) hotmail.com> wrote



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