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Subaru - Help !!!! Again !!!!

azgunnut2@yahoo.comazgunnut2@yahoo.com Member Posts: 305 ✭✭✭
edited January 2002 in General Discussion
I posted this yesterday , got an response butit dissappeared before I could read it ????O.K. so Im a "gunsmith" not a mechanic , we have a '85 subaru 4 cly. in what appears to be very coog cond. w-apx 125000 miles , wehave replaced : radiator & cap , water pump ,belts , hoses , thermostat , flushed it ...it starts & runs great , shows NO signs of acracked head or blown head gasket - but , itis o.k. at idle (even for an hour) but if Udrive it apx. 15-20 miles it OVERHEATS big time ??? any suggestions before I shoot it???Thanks !!!...azgunnut2@yahoo.com............
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Comments

  • silentmarksmansilentmarksman Member Posts: 40 ✭✭
    edited November -1
    I can get you an answer by tomorrow, unless someone gets to it before I do. I'm no mechanic either, but I live with one.
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  • tccoxtccox Member Posts: 7,379 ✭✭
    edited November -1
    I'm not much of a mechanic either but the new thermostat could also be bad. I believe you have an electric fan. Make sure the fan comes on. I have had fan problems on my Subaru. Tomps. the previous probably was deleted since this is for gun experts and not for autos!! You probably would be better off posting this on the general forum. tom
    Those who beat their swords into plowshares will plow for those who dont.
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  • LowriderLowrider Member Posts: 6,587
    edited November -1
    What do you mean "no signs" of a cracked head or blown head gasket? That could be exactly what it is. Cracked between the cylinder and water jacket, or the gasket blown between the cylinder and water passage. It wouldn't necessarily show any visible signs of water or compression leakage. Is it going through water? Do you see any signs of water or steam out the exhaust?
    Lord Lowrider the LoquaciousMember:Secret Select Society of Suave Stylish Smoking Jackets She was only a fisherman's daughter,But when she saw my rod she reeled.
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  • v35v35 Member Posts: 12,710 ✭✭✭
    edited November -1
    Again since this was deleted: Check that the electric cooling fan cycles off and on and check the ignition timing.As another suggested; does your car consume water? If so there is leakage, bypassing the cylinder head gasket into the combustion chamber or a cracked cylinder.Are the water hoses connected correctly and are any kinked?
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  • daddodaddo Member Posts: 3,408
    edited November -1
    If the car idles o.k. and doesn't overheat- the fan is not the problem, since you don't need a fan after 35 mph. I would check the water pump again and make sure the impellers aren't slipping or that the belt isn't slipping. Make sure the water is 50% dilluted with antifreeze. The thermostat may not be opening 100%.
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  • jltrentjltrent Member Posts: 9,333 ✭✭✭✭
    edited November -1
    Saxon could I get you to work on my truck? It is a diesel 4 cylinder and have had pump and injectors rebuilt so far an no luck yet.Driving 20 miles before overheating rules out a lot of things. I would put another thermostat in it an try it, also I would go to a Subaru dealer and get one. I once had a Mazda car and no aftermarker thermostat would work properly in it.(The mazda thermo was made a little differently and it worked). Also I don't believe anybody has mentioned it yet, with the car running take the oil filler cap off and see if there is any smoke coming out of it. If there is any then you have blow-by problems.
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  • MNTNMANMNTNMAN Member Posts: 46 ✭✭
    edited November -1
    IT COULD BE MANY THINGS, FIRST CHECK TO SEE WHAT TEMP RANGE THE TERMASTAT IS FOR. YOU MAY WANT ONE THAT OPENS AT A COOLER TEMP.
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  • Norman DogNorman Dog Member Posts: 470 ✭✭✭
    edited November -1
    A compression check could show a head gasket/cracked head type leak if nothing else does. Some cars are sensitive to the kind of thermostat that is installed. Also, some parts counter guys (not all) just don't know what they are talking about and will recommend the wrong thermostat temperature range - especially if you live in a hot climate (like Arizona). Common practice used to be to put a lower-temp thermostat in to compensate for high summer temps. Newer cars tend to be more sensitive to engine temperature and sometimes need a higher temp thermostat so that everything works properly.
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  • REBJrREBJr Member Posts: 1,210 ✭✭✭✭✭
    edited November -1
    Had a truck do the same thing, overheat only while driving- take to carwash and spray radiator. probably only partially stopped up with bugs and dirt.-Ralph
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  • DickSkinnerDickSkinner Member Posts: 9 ✭✭
    edited November -1
    Replace or knock the guts loose in the Catalytic Converter. Back pressure is causing overheating under load.Shade abounds under the shade tree....
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