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5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
ok got a stock 5.0 5 spd 1989 mustang, had heads checked and block checked for warpage,they are ok,put in new head gaskets,intake gaskets upper and lower,new water pump,new radiator,new radiator cap,new therm and gasket(190DEG) its filling the overflow bottle and loosing coolant but no visable leaks, will run 190 for 10 miles then gets hot 250, then when i check rad its low,have burped twice by lifting left front in air,run till t satat opens then refill and cap take for a short ride then refill .the next time i drive it it does a repeat overheat, frustrated and upset, help with some sugestions helpfull, checking the oil today to see if there is water in oil, alittle white residue on dipstick but i only changed the oil once
overheat = result of low coolant....get a pressure tester and put system under pressure and look for leaks....if it leaks down and no visible external leaks.....put system under pressure, pull plugs and shine a light in the hole and look for green entering and then after a few minutes under pressure drain oil and see if a bunch of green comes out first...if the leak is internal coolant will come out first as oil is lighter than water.
i'm no mustang guru but i had similar problem with my 95 it was because of my ccrm. also chaeck to make sure your fan is coming on. i also had my ect sensor go witch keeps the car from overheating just a thought. as for the missing coolent probly a pinhole leak somewhere like mjr46 said pressure test it.
well pulled the plug today, definitly have water in the pan, getting real tyed of this ford
got to pull it apart again.i problely got a cracked head, hope the block is ok hate this guess work
ok, i had gotten a bad gasket, all changed and torqued properlly, runs 190/195 with no more issues ,ty for imput and sugestions, whole top end regasketed,air bleed,oil changed,new radiator,waterpump and 191 t state with a new radiator cap,
ok, i had gotten a bad gasket, all changed and torqued properlly, runs 190/195 with no more issues ,ty for imput and sugestions, whole top end regasketed,air bleed,oil changed,new radiator,waterpump and 191 t state with a new radiator cap,
Very similar problem here. Have a '90 GT with only 55k miles. Installed an E303 cam and lifters. Found coolant on dipstick so I installed new head gaskets. Car still ran really bad, tried a few fixes with no luck. Just checked and found coolant in oil again! Grrrr.
Should have never messed with a new cam since it ran great before I got stupid. Suggestions on where to go from here? Thanks, guys.
05-06-2015, 05:12 AM
loosing coolant runs hot
