Question about 1991 Acura Legend

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How can i ell if my water pump is failing

I drive for about 15 minutes and car over heats. i put more water in and drive another 15 minutes and car over heats again

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Over heating has many causes.
what are the signs, just the gauge going high. ?
steam shooting out rad cap. (is the cap even good>?)
side recovery tank, blasting? with hot water and steam.
oil in the RAD neck , (cold engine) RAD=Radiator assembly.
antifreeze "AF" in the engine oil>? (dip stick looks like milkchocolate?
leaks to the ground, from what?? (find it)
does the RAD fan come on , overheated, It must. does it?
is the RAD core clean? outside, ? not packed with bugs and leaves.
the #1 failure part is the thermostat. put in a new one. and cap.
they are cheap . and easy to change out both cap and STAT.
are you running 50% AF? , using the Prestone $2 tool for the test?
AF raises the boiling point of water, to 260?F
the cap holding pressure and the AF both raise it that high.
if car does not over heat, moviing, only, nows that time to say so..
get in car, cold , drive did it overheat with no stop signals?
(moving gives free air flow to the RAD, proving it works)
Use the radiator leak down tool. to see of loop is beached.
Use the Exhaust gas detector tool at RAD cap to see if the head gasket is blown.

how do you know the pump is. bad.
1: it leaks
2: the impeller is dust.
3:ITS pulley wobbles like mad.

my answer, the pump is after all other test pass.
including a RAD core, thermogram
i can check each rad tube 1 by 1, in fact i threat my RAD
as 10 or more tiny radiators (it is)
see 50 mile test here, RAD cores
They get 34f degree tube drops.. each tube must drop or its clogged.
all for a $15 tool and no burned fingers.
measure each tube about 2inch from top of tank and bottom
and both tanks. (this test is very revealing)
http://www.fixkick.com/Cooling-engine/therm-o-gram.html

Posted on Feb 15, 2014

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Posted on Jan 02, 2017

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