Question about 1994 Acura Legend
My 1994 Acura Legend keeps running hot. Gauge will read in the red then come back down & shortly thereafter, go back up again. HELP!
When the car is completely cool,check the electric fan(s) for smooth rotation.
Clean/check/change the thermo sensor,contact and wire.
Excavate air pocket in coolant system / check for head gasket leak
This test will kill two birds with one stone.
MAKE SURE THE COOLANT SYSTEM and ENGINE IS COLD!
RAN THIS TEST IN A WELL VENTILATED AREA ONLY!
You will spill some coolant during this air pocket purge test.......BE KIND TO THE ENVIRONMENT and ANIMAL please clean up after the test!
Put the front end on a pair of ramp or park your car on a VERY STEEP HILL (radiator facing top of the hill) .
Top of the coolant reserve tank
Let it ran for 10-15 minutes.
Monitor for air pockets escaping from coolant reserve tank.
Small amount of bubbles is OK at 1-5 minute mark
After the thermostat open up (after 195 F warm up) at
5-12 minute mark or after high idle you should see less bubbles.
If you do not see any in rush of bubbles then your thermostat may be partially stuck or rusted badly inside the thermostat hosing.
Give the thermostat host few gentle taps.
If you see larger bubbles surfacing after 15 minutes then should do a hydrocarbon (HC) dye test to test for potential head gasket leak.
Let engine cold down and top off coolant reserve tank.
Start monitor for coolant lost
A coolant flush is require every 2 years or 24,000 miles.
I recommend the thermostat that has a relief pop-let to reduce the change of burst radiator and coolant hoses.
Make sure you get a new thermostat gasket,black RTV and fresh coolant for the job.
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Posted on Dec 05, 2009
I am having the problem as well, soon as I crank my 94 Acura Legend V6 up, the water bubbles out of the overflow tank. After the car runs for a minute it runs fine for the day. I changed the thermostat and flushed my radiator. Can anyone help me with this? A mechanic also looked at it and said that there is no sign of a blown head gasket. Email me at email@example.com with any help......
Posted on Oct 09, 2012
A failing thermostat could possibly cause this.
Posted on Nov 18, 2009
Sounds typical of air in the coolant system.
Posted on Nov 18, 2009
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Posted on Jan 02, 2017
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