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    #1

    No heat?

    So, Watchdogs car has no heat... Thought it was the slide control for the Hot / Cold as it was sticking, and causing the problem, as you couldn't move it. So today he got that free'd up, and still no heat... So we looked around some more, and found these two valves had no vacum hoses to them, not sure what they do, but could these be the issue? (Especially the one with the heater hose coming out of it) The engine is a 351, with a four barrel...






    As far as he knows, it has a thermostat in it... (He is going to double check with the guy that put the new intake in last year)

    Anybody have any ideas, along with where to look???


    Agent Caitlin Todd… You know Tony, Statistics show that married men live longer…
    Agent Tony DiNozzo… It only seems longer….

    http://www.tomspolicecars.com/
    Tags: None
    #2
    There isn't a heater control valve on these cars. The heater core gets full coolant flow all the time. Thats some sort of thermostatic vacuum valve for the smog control stuff. Lord knows what used to go there but it won't be related to the no heat problem. if the engine warms up normally, as in the upper hose gets actually hot to the touch, its probably got a thermostat. Feel the two hoses to the heater core. If they aren't both hot, the core is most likely clogged. If both are hot, its probably a blend door problem. If its not automatic temperature control, most likely the cable is broken or the slide control in the dash broke. The 90-91 type seems to be a lot more fragile than earlier ones.
    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

    Comment

      #3
      The blend door is operating, we could here it open and shut today....


      Agent Caitlin Todd… You know Tony, Statistics show that married men live longer…
      Agent Tony DiNozzo… It only seems longer….

      http://www.tomspolicecars.com/

      Comment

        #4
        Sorry it took so long to get back, Gadget, thanks for the info. The upper hose gets warm but not hot. Both heater hoses are almost cool to the touch, and this is after about two hours of stop and go driving. I'm thinking thermostat. I'll visually conferm, and fix that this week.
        1991 LTD P72 351 W Restored Century Police (Ongoing Project) Sergeant Vic.

        It's a dog eat dog world and I'm wearing milk bone underwear.

        Comment

          #5
          Guess that radiator I gave you is working good, then!


          Agent Caitlin Todd… You know Tony, Statistics show that married men live longer…
          Agent Tony DiNozzo… It only seems longer….

          http://www.tomspolicecars.com/

          Comment

            #6
            yeah, sounds like the thermostat is missing or stuck open.
            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

            Comment

              #7
              yeah, sounds like the thermostat is missing or stuck open.
              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

              Comment

                #8
                replace thermostat, try again

                1986 lincoln towncar signature series. 5.0 HO with thumper performance ported e7 heads, 1.7 roller rockers, warm air intake, 65mm throttle body, 1/2" intake spacer, ported intakes, 3.73 rear with trac lock, 98-02 front brake conversion, 92-97 rear disc conversion, 1" rear swaybar, 1 3/16" front swaybar, 16" wheels and tires, loud ass stereo system, badass cb, best time to date 15.94 at 87 mph. lots of mods in the works 221.8 rwhp 278 rwt
                2006 Lincoln Town Car Signature. Stock for now
                1989 Ford F-250 4x4 much much more to come, sefi converted so far.
                1986 Toyota pickup with LSC wheels and 225/60/16 tires.
                2008 Hyundai Elantra future Revcon toad
                1987 TriBurner and 1986 Alaska stokers keeping me warm. (and some pesky oil heat)

                please be patient, rebuilding an empire!

                Comment

                  #9
                  Still working on the no heat issue. New thermostat, 190 degrees. The engine seems to like the hotter thermostat but still no heat. WTF??? Blend door is operating, heater hoses are warm but not hot, both of them, and over the last couple of days, when I turn on the defroster I get a puff of steam and a smell of antifreeze. Just a whiff and it clears after a few seconds. Still no leaking to the inside of the car that I can find but I am beginning to think the heater core is on it's way out. Yay for me.

                  I am thinking of trying to backflush it then try some stop leak. If that fails then I have to change the heater core anyway so what to I have to lose, And if it does start to leak I can just bypass it till I can fix it.

                  How much of a bitch is it going to be to change, are there any tricks I can use or am I pretty much boned? I want to fix this because, even here in Florida it gets cold. Low of 29 tonight and low 30s for the rest of the week. Plus in cold weather my windshield won't clear.

                  Car is a 91 P71 with 351W.
                  Last edited by watchdog; 01-02-2012, 10:05 PM.
                  1991 LTD P72 351 W Restored Century Police (Ongoing Project) Sergeant Vic.

                  It's a dog eat dog world and I'm wearing milk bone underwear.

                  Comment

                    #10
                    Not sure you want to put any Stop Leak in if you are going to change the core anyway. I understand you want to "buy time" but I'd think about it if I were you. Surely sounds like a bad core, though.


                    "Hope and dignity are two things NO ONE can take away from you - you have to relinquish them on your own" Miamibob

                    "NEVER trade your passion for glory"!! Sal "the Bard" (Dear Old Dad!)

                    "Cars are for driving - PERIOD! I DON'T TEXT, TWEET OR TWERK!!!!"

                    Comment

                      #11
                      Puff of steam sounds like the core is leaky. It may just be plugged up. Flushing it may get you heat again, but it will likely aggravate the leak as well. When they get really nasty, you don't get heat. I've sen a number of Floridians that run straight water because it seldom gets below freezing. Doing that will make the cooling system crap up in a bad way. If thats what was done with it, the core just might be plugged fast.
                      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

                      Comment

                        #12
                        I live in South East Florida and still run 50/50 in my radiators. Rust and other gunk preventative....


                        "Hope and dignity are two things NO ONE can take away from you - you have to relinquish them on your own" Miamibob

                        "NEVER trade your passion for glory"!! Sal "the Bard" (Dear Old Dad!)

                        "Cars are for driving - PERIOD! I DON'T TEXT, TWEET OR TWERK!!!!"

                        Comment

                          #13
                          I have made a decision. I am going to go ahead and just change the heater core. Major PITA, I know, but I thought that while i had the dash out that I would replace it with a near perfect, crack free one I found in a 91GM at the local pick and pull today. It's even the right color. next Monday I am going to pull the new one and get it cleaned up and in the next few days after that...in it goes. While I'm in there it will get a new heater core, clean heater box, lube blend door, repair/replace any questionable vacuum lines. Any suggestions for any other maintenance will be greatly appreciated. I only want to do this once. I will be taking lots of pics and Tom W and I will do a write up for a 91 box dash replacement.
                          1991 LTD P72 351 W Restored Century Police (Ongoing Project) Sergeant Vic.

                          It's a dog eat dog world and I'm wearing milk bone underwear.

                          Comment

                            #14
                            you may want to drop the air plenum box out entirely and rebuild it. the hinges in those are prone to breaking, causing no air control. basically air comes out of everyplace. You can pull the box and drill the rivets out to seperate it, then replace the existing plastic hinges with small metal hinges to fix this.

                            I'd also give a vote for trying to clean out the AC evaporator case as best you can while things are apart. Don't really know if its more accessible with the dash out, but its worth a look. Some of it you can get by pulling the blower motor, but not all.
                            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

                            Comment

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