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    #1

    Gradually Overheating?

    The Town Car likes to gradually overheat while driving, even at low speeds. Driving, it'll slowly climb higher and higher on the gauge each time before it drops, then it holds pretty steadily at the top of the gauge without dropping. It's more pronounced when I put my foot into it.

    It has coolant and it has a pretty new radiator. Opinions? Should I just go ahead and replace the thermostat and water pump?
    2011 Mustang GT Premium, MT82, Kona/Saddle, HIDs, 3.73s, 19s, hood/side stripes, UPR 1.5" springs with adjustable panhard bar, and UMI solid LCAs and relocation brackets.
    1992 Explorer Eddie Bauer, slight lift, 34s, and A/C...
    1979 Bronco Custom, 351M/C6/NP205, 4" lift, 35s, lots of fender trimming.
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    #2
    I suggest checking your hoses too. I had a similar prollem in my old 5.0 Bronco, and it turned out to be a small leak in the upper heater cooling hose. When the water pump would speed up with the RPMs of the motor, it would actually suck in bubbles of air which sent my guage into an epileptic fit. If your hoses are sound, I think definetly a thermostat first, they are pretty cheap. That waterpump can be a bitch to change out.

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      #3
      Interesting. I'll certainly do that. Thanks for the tip.
      2011 Mustang GT Premium, MT82, Kona/Saddle, HIDs, 3.73s, 19s, hood/side stripes, UPR 1.5" springs with adjustable panhard bar, and UMI solid LCAs and relocation brackets.
      1992 Explorer Eddie Bauer, slight lift, 34s, and A/C...
      1979 Bronco Custom, 351M/C6/NP205, 4" lift, 35s, lots of fender trimming.

      Comment

        #4
        what you describe is classic signs of a sticking T-tast, replace it.

        check the fan clutch while you are in there.
        2003 Town Car Signature - 3.27 RAR, Dual exhaust and J-mod - SOLD 9/2011
        89 Crown Victoria LX HPP -- SOLD 9/2010
        88 Grand Marquis LS - The Original -- Totaled 5/2006

        I rebuild AOD/AODE/4R70W/4R75E transmissions....Check out my Facebook page: https://www.facebook.com/pages/North...48414635312478

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          #5
          I already have a t-stat, so I'll go ahead and swap that out. The fan clutch really seems to be in good shape... but the car is old and it has sat up a lot in the past couple years.
          2011 Mustang GT Premium, MT82, Kona/Saddle, HIDs, 3.73s, 19s, hood/side stripes, UPR 1.5" springs with adjustable panhard bar, and UMI solid LCAs and relocation brackets.
          1992 Explorer Eddie Bauer, slight lift, 34s, and A/C...
          1979 Bronco Custom, 351M/C6/NP205, 4" lift, 35s, lots of fender trimming.

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            #6
            The old and new thermostats in my Malibu used to do that. It would go up to the temp of the t-stat and it would drop from 195* to 175*. The worse was in traffic; at a standstill that 305 would run higher and higher until I got moving again and then it would slowly return to normal temps. That was with a four core radiator too. I thought it was just the way the new t-stats were manufactured nowadays.


            Packman

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              #7
              Check your fan clutch
              Pebbles-1968 Ford F250
              Pile of Junk! An Electronics Project Site (To get wet by)<---Clicky! NEW STUFF!!!!

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                #8
                I'd also flush the radiator out, might be partially clogged. Wouldn't hurt especially since its gotta be drained to do the tstat.
                86 Lincoln Town Car (Galactica).
                5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

                91 Lincoln Mark VII LSC grandpa spec white and cranberry

                1984 Lincoln Continental TurboDiesel - rolls coal

                Originally posted by phayzer5
                I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

                Everything looks like voodoo if you don't understand how it works

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                  #9
                  It could also be your hoses, sometimes a old hose will collapse and block the flow. If you can pinch the big hose shut you need to replace them.
                  89 CV LX 225/60 x 16 tires, CC819 rear springs, Front & rear sway bar, trans & PS cooler from 90 cop car. KYB shocks, F-150 on rear. Dual Exhaust w/ H pipe. Dark brown door panels, carpet, steering wheel, trim parts from a 87 Mer GM. Power front buckets from 96 Jeep Cherokee. LED'S front & rear. 3G Alt from a 97 Taurus wagon 3.0. Electric fan. Rear axle from a 97 PI 3.27 with disk brakes. Headlight relays.

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                    #10
                    See if you can find one of those doohickey's that scott has to vacuum out all the air bubbles and pull in water until its completely full. I havent got the 408 to top 190 the whole time ive been driving it so far

                    T-stat sounds like its sticking too.

                    RIP Jason P Harril, we'll miss ya bro

                    '80 Town Coupé
                    '84 Towncar - Teh Cobra TC, 408w powered
                    '16 Ram 1500 CC Outdoorsman, Hemi/3.92/8sp 4x4

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