Car Stuck! Engine Coolant boiling over - Update

[mike]

so, whats the verdict?

fan failed and took gasket with it?

mike

 --- SJ <syljay at optonline.net> wrote: > Update- Head
Gasket Problem
> 
> Towed the car home . . .35 miles . .  $145 . . ouch!
> 
> 1. Checked fan motor, jumper from battery post to +
> in back of motor.
> - Got spark, then nothing . . no more sparks. Hmmmmm
> - Checked the fusible link for the fan motor ground.
> Its located a few
> inches from the motor. Looked broken . .removed it.
> - Link was cracked and open. looks like an old
> crack, no new metal showing.
> Maybe it was intermittant.
> - Replaced fusible link, cleaned all contacts and
> hardware.
> - Checked fan motor with jumper, works ok.
> 
> 2. Applied jumper from battery post to 3 contacts at
> the resistor block.
> - All 3 positions work . . .3 different speeds.
> 
> 3. Tested after-run circuit.
> - Ignition on and off (need to energize the timer in
> the after-run relay)
> - Jumped contacts at the air temperature sensor at
> back of engine.
> - Fan went on.
> 
> 4. Test A/C fan circuit
> - igniton on
> - climate control to Auto
> - radiator fan comes on
> 
> 5. Ran engine
> - Checking water flow
> - Water pipe coming from heater radiator was cold. I
> thought it should get
> hot after a few minutes.
> - water valve is in open position
> - still old after 5 minutes . .shut off engine. . .
> .maybe something blocked
> in heater plumbing.
> 
> 6. Took apart cooling system.
> - blow air thru heater core at the shut off valve .
> . .watch water and air
> rush out at the thermostat housing. . . no
> obstructions
> - put finger inside thermostat housing and feel for
> water pump impeller .
> .turn engine with wrench . .impeller turns
> - tested water thermostat in pot of water on stove.
> .opens at 87C  just like
> its supposed to.
> - put back cooling system, used old thermostat with
> guts removed(need the
> flange for proper O ring sealing).
> - fill up system with water
> 
> 7. Test for air bubbles caused by head gasket per
> Bob Myers.
> - Attached clear plastic tubing in place of upper
> radiator hose. Duct tape
> it in place.
> - attached clear tube to overflow nipple in
> radiator, other end of tube into
> large jar filled with water.
> - attach and tighten reservoir cap
> - Start engine
> - water flowing  . .. water pump is ok.
> - large and small bubbles in the water flow(maybe
> its the residual air in
> system)
> - Rev engine for few minutes to blow out air . .
> lots of water flowing
> - bubbles in water  . . bubbles blowing out the
> radiator overflow nipple .
> .can see them in the jar of water
> - engine warming up . . .more bubbles . .steady
> stream of bubbles
> - engine warmer - lotsa bubbles . .big bubbles
> - starting to do the volcano act . .shut off engine.
> Fan never came on, temp guage at 1/4 <>1/3
> 
> Conclusion:
> Water bubbles being generated internally in engine
> I guess I need to replace head gasket.
> Are there any tricks to replacing the head gasket?
> New head bolts required?
> Are these heads prone to warping? I'll do a quick
> check with a straight
> edge.
> Do I need the Timing Belt tools . .crank holder and
> torque multiplier
> adapter?
> How do you pop off the head? Loosen head bolts and
> crank the engine so
> compression pops the head?
> 
> 
> Will read the manual tonight on head removal.
> 
> SJ
> 
> 
> 
> >From: "Robert Myers" <robert at s-cars.org>
> >
> > Watch the coolant in the tank as the engine idles.
>  If you see a flow of
> > gas through the plumbing with the engine only warm
> not hot then suspect a
> > head gasket leak.
> >
> >
>  = = = = = = = = = = = = = = = = = = = =
> > >90 100q, normally aspriated, manual
> > >
> > >Wife drove car to a wedding shower. When she
> pulled into the parking lot,
> > >the expansion tank boiled over. The parking guys
> waited till engine
> cooled
> > >off and added water. No leaks.
> > >Wife said temp guage read normal. She got a low
> water warning light when
> she
> > >pulled into the parking lot.
> > >
> > >I just came back from checking out the car. The
> water that was added has
> not
> > >leaked out, so I can eliminate any big leakers.
> > >Started up the car and let it idle. Temp came up
> normally. After about 10
> > >minutes or so, temp guage read 1/3.
> > >No leaks noted . .both hoses were hot.
> > >After another few minutes, the expansion tank
> boiled over(I had the cap
> on
> > >loose). About 2 quarts and lots of steam came
> out.
> > >The radiator fan never came on.
> > >
> > >The radiator is new, about 5k miles on it. All
> the hoses  are new.
> > >Timing belt and water pump replaced 35k miles
> ago.
> > >Thermostat replaced about 25k miles ago.
> > >
> > >My hunch is a stuck thermostat.
> > >I will pick up a new thermostat and gasket and go
> to where the car is
> stuck
> > >and attempt replacing the thermostat in the
> parking lot.
> > >
> > >As I recall, unbolting the hydraulic pump and
> moving it aside opens up a
> lot
> > >of access room to the hoses and thermostat
> housing. After that, one has
> > >access to the two thermostat housing bolts.
> > >
> > >Any other opinions as to the nature of the
> problem?
> > >
> > >
> > >SJ
> 
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