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    Thread: Help with Lincoln LS V8 Overheating Problem...

    1. Member Jetty!'s Avatar
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      08-19-2009 10:59 AM #1
      My mom's Lincoln LS V8 tends to overheat in any sort of stop/go traffic when it's hot outside. This has been happening since last summer but when the car gets moving or onto the highway, it comes back down to normal temperature. Luckily, she hasn't blown a headgasket or cracked the block yet.

      The thing is, the fan kicks in at idle, and it seems a lot of people blame the hydraulic fan unit (which was replaced with an electric unit in 03), but the fan does kick in when sitting.

      Also, from doing some quick google searches, it seems to happen to A LOT of LS owners, and no one really knows the common culprit (temp sensor, thermostat, air in the lines, or the fan unit) are all listed as a possibility. The fan unit is about $400 so we don't want to throw that kind of money at something if it's not going to fix it. Also, the V6 and V8 have the same radiator/fan apparently.

      Looking for some collective help here. Thanks in advance.


    2. Geriatric Member ByronLLN's Avatar
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      08-19-2009 11:05 AM #2
      Has the cooling system ever been flushed? Grab some appropriate antifreeze, a few gallons of distilled water, a couple good-sized catch buckets and a six pack for the downtime and give it a good purge. Has it been unusually hot these last couple summers where you are? It could be that the car is running a coolant mixture that isn't ideal for your climate.
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    3. Member jtls8's Avatar
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      08-19-2009 11:09 AM #3
      Make sure the cooling system is properly burped. I had a problem with that after picking mine up from a sway bar/ps rack replacement. Aside from that, ask over at http://lincolnvscadillac.com/. Lately it's been kind of like the MKIV forum here but there are still a few helpful individuals left there.
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    4. Member Jetty!'s Avatar
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      08-19-2009 11:10 AM #4
      Quote, originally posted by PassSedanGLX »
      Has the cooling system ever been flushed? Grab some appropriate antifreeze, a few gallons of distilled water, a couple good-sized catch buckets and a six pack for the downtime and give it a good purge. Has it been unusually hot these last couple summers where you are? It could be that the car is running a coolant mixture that isn't ideal for your climate.

      Not sure. This is what happens when I let my mom take care of her own preventive maintenance. She thinks she has but I don't see a document. It's a tight fit in that engine bay... how do I go about finding the drain?


    5. Geriatric Member ByronLLN's Avatar
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      08-19-2009 11:14 AM #5
      Quote, originally posted by Jetty! »

      Not sure. This is what happens when I let my mom take care of her own preventive maintenance. She thinks she has but I don't see a document. It's a tight fit in that engine bay... how do I go about finding the drain?

      Should be smack dab on the center of the radiator. If it's unreachable, you could also pop the hoseclamp off the lower radiator hose and drain it that way. Just be sure to wear eye protection as that mess will splash off of everything and find its way into your face.

      As mentioned above, "burping" the system would be a good first step before you go for a full flush. There are lots of how-tos on this if you google it.

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    6. Member TurboWraith's Avatar
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      08-19-2009 11:16 AM #6
      Quote, originally posted by Jetty! »
      how do I go about finding the drain?

      Lower radiator hose, remove it.

      I would also try cleaning the radiator itself. Lots of bug guts and rocks can reduce the radiators performance. It would seem to make sense that at highway speeds it isnt a problem as there is more than enough air passing over the core, but at low speeds the fan cannot pull enough air to make up for some blockage.


    7. Senior Member patrikman's Avatar
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      08-19-2009 11:16 AM #7
      x2 on the flush and fill. not sure where there thermostat is but, take a look at that. there might be a chunk stuck in there blocking flow and movement. a new radiator cap never hurts either.
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    8. Member Jetty!'s Avatar
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      08-19-2009 11:18 AM #8
      So basically you're supposed to drain the coolant, then fill it with half coolant/half distilled and then burp it? Doesn't coolant already come 50/50 as it is?

    9. Member TurboWraith's Avatar
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      08-19-2009 11:21 AM #9
      Quote, originally posted by Jetty! »
      So basically you're supposed to drain the coolant, then fill it with half coolant/half distilled and then burp it? Doesn't coolant already come 50/50 as it is?

      Some does, some doesnt. its usually cheaper to by the 'concentrated' coolant and mix it yourself. but you can buy the 50/50 if you want.

      Might as well check the thermostat to as someone else suggested. Although I doubt there is anything wrong with it. The funcion of the thermostat is to regulate the minimum temperature that the car runs at. If it sticks open, it will have a hard time heating up, if it sticks closed it will overheat the car VERY quickly as the radiator wont be getting any coolant flow.

      It is rare for one to stick halfway. But you might as well look.


    10. Member Jetty!'s Avatar
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      08-19-2009 11:23 AM #10
      Ok I'm going to try the flush and fill. I didn't know air pockets could form so easily in the coolant system.

      It hasn't been unusually hot here. The summer has been very mild until recently, in the 90s lately and it's become more of a problem recently. But if you get into normal stop/go if it's hot, then the needle on the temp gauage climbs pretty easily. Happened last year when I brought my mom to JFK with her LS when we got stuck in traffic, and I had to pull off and let it cool down periodically. No problems in the fall or winter.


    11. Member Jetty!'s Avatar
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      08-19-2009 12:39 PM #11
      By the way, any idea how much coolant I'd need to fill the system?

    12. 08-19-2009 12:42 PM #12
      C4C will solve this problem.

    13. Senior Member patrikman's Avatar
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      08-19-2009 12:43 PM #13
      you should be able to get a rough idea in the owners manual. it is usually listed under fluid capacities in the user maintenance section.
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    14. Member 200HP4dr's Avatar
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      08-19-2009 12:43 PM #14
      The car has an electric fan? There may be two settings. A high setting and a low setting. The high setting should kick on if she has the A/C going. There's a potential that the fan may not be getting the signal to kick into high mode, but it may use a different sensor to open the low mode.

      I know nothing about lincolns, though, this is only my experience with older Audis.

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    15. 08-19-2009 12:52 PM #15
      Quote, originally posted by TurboWraith »

      Some does, some doesnt. its usually cheaper to by the 'concentrated' coolant and mix it yourself. but you can buy the 50/50 if you want.

      Might as well check the thermostat to as someone else suggested. Although I doubt there is anything wrong with it. The funcion of the thermostat is to regulate the minimum temperature that the car runs at. If it sticks open, it will have a hard time heating up, if it sticks closed it will overheat the car VERY quickly as the radiator wont be getting any coolant flow.

      It is rare for one to stick halfway. But you might as well look.


      most are designed to stick open....

      much like what happened in my jetta....in the middle of the winter....

      Yeah, a car doesnt heat up much in -10 degree weather..


    16. 08-19-2009 12:52 PM #16
      Quote, originally posted by Jetty! »
      Also, from doing some quick google searches, it seems to happen to A LOT of LS owners, and no one really knows the common culprit

      Sounds like a typical American car to me.


    17. Senior Member patrikman's Avatar
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      08-19-2009 12:54 PM #17
      Quote, originally posted by TabulaVicious »

      Sounds like a typical American car to me.

      sounds like trollbait to me.

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    18. Banned justanotherusername's Avatar
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      08-19-2009 01:03 PM #18
      This sounds like air trapped in the system to me, and the suggestion to "burp" it is a good one. Thermostats do fail from time to time, and I've seen them stick open and closed, but it's not a very common problem. If burping doesn't help, it's not a bad place to go next because the thermostat is cheap.

      If the fan is running I wouldn't mess with that (unless it's got two fans, then it can be more complicated) . The next step is going to be the water pump.


    19. 08-19-2009 01:04 PM #19
      Quote, originally posted by patrikman »

      sounds like trollbait to me.

      Don't worry, TabulaViscious is probably the only member on here that has such a lack of a real life as to manage to post nearly 10,000 times, but still manage to contribute almost nothing worthwhile to any discussion. Search his posts if you don't believe me .


      Modified by WhistlerYOW at 12:08 PM 8-19-2009


    20. Member Jetty!'s Avatar
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      08-19-2009 01:16 PM #20
      Quote, originally posted by TabulaVicious »

      Sounds like a typical American car to me.

      My sister's Jetta is at the mechanics for a cracked power steering rack, bad CV axle, faulty transmission (won't shift out of 3rd gear), and broken wiper linkage.

      But yea, typical american car.

      But no, the fan is controlled hydraulically, not electric. The electric version came in 03 and later.


    21. Senior Member ClockworkChad's Avatar
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      08-19-2009 01:34 PM #21
      my first guess is bad/sticky t stat. they are cheap, you might want to do that before you flush the coolant since it is going to make a mess as well.
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    22. Member Jetty!'s Avatar
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      08-19-2009 02:32 PM #22
      Hm ok. I've been doing some more searching and everyone's had different explanations, waterpump, thermostat, fan, air in the system.

      In fact, the other issues she's had with the car during ownership seems to be VERY common from what I've seen posted on the forums. At least they're consistent.


    23. Geriatric Member ByronLLN's Avatar
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      08-19-2009 02:35 PM #23
      Quote, originally posted by Jetty! »
      Hm ok. I've been doing some more searching and everyone's had different explanations, waterpump, thermostat, fan, air in the system.

      How many miles on it?

      Air/blockages in the system are very cheap (or even free) fixes. T-stats are fairly cheap, but water pumps and fans can get pricey.

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    24. Member Jetty!'s Avatar
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      08-19-2009 02:42 PM #24
      It's a little over 100,000 now, maybe like 108,000 or so? Not quite sure.

      Is this a good explanation for "burping the system"?
      http://www.ehow.com/how_7369_b....html


    25. Senior Member ClockworkChad's Avatar
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      08-19-2009 03:21 PM #25
      Quote, originally posted by PassSedanGLX »

      How many miles on it?

      Air/blockages in the system are very cheap (or even free) fixes. T-stats are fairly cheap, but water pumps and fans can get pricey.

      thats why i said it, if your going to pop a hose off to change the coolant and burp it, you might as well throw the t-stat in there while you're at it.

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    26. Geriatric Member ByronLLN's Avatar
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      08-19-2009 03:51 PM #26
      Quote, originally posted by Jetty! »
      It's a little over 100,000 now, maybe like 108,000 or so? Not quite sure.

      Is this a good explanation for "burping the system"?
      http://www.ehow.com/how_7369_b....html

      Yep. That sums it up.

      Has the water pump ever been replaced? At 100k+ miles, that and the timing belt should have been done preventatively (assuming it's a belt, not a chain).

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      08-19-2009 04:44 PM #27
      Is the car actually overheating? Are you determining this by smoke or the reading on the dash?
      Make sure all the hosing is connected.

      A bad thermostat is usually a cheap easy fix many times.

      What kind of antifreeze is used in a Lincoln? Don't mix red with green! It can cause problems.


    28. Member Jetty!'s Avatar
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      08-19-2009 09:35 PM #28
      Apparently it's a timing chain. She had the dealer look at it and said it doesn't need a timing chain. I'll check into the water pump. The fan still works, I checked it today.

      No smoke, just the temp needle moves up to the top and the multi-funciton display starts to give a temp warning and starts beeping.


      Modified by Jetty! at 8:44 PM 8-19-2009


    29. Member sandiegan's Avatar
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      08-19-2009 10:02 PM #29
      My mom has an LS and it had this exact same issue (I even had the car for a few weeks and took it in to get fixed). It is a common issue, and extremely costly to fix. The cooling fan is **** . Henceforth, sub-par reliability ratings from Consumer Reports for the LS/S-Type.

      Parts - $1025
      New motor and cooling fan assembly
      New Cooling pump assembly
      Seals etc.
      New coolant/flush
      Labor/Other - ~$700

      Total - ~$1800

      Happened at 90k miles. Buckle up


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      08-19-2009 10:47 PM #30
      Quote, originally posted by sandiegan »

      Total - ~$1800

      That's crazy. If I got a quote for that much I would rip out the whole damn thing and replace it with aftermarket fan(s) and controller.

      Controller:
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    31. Member Jetty!'s Avatar
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      08-20-2009 02:21 AM #31
      Uh oh. Did your mom's fan still work though? that's what I'm not understanding. The fan kicks in and runs...

    32. Member 08-Jetta's Avatar
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      08-20-2009 03:32 AM #32
      I have to say that these cars are amongst the worst I have ever seen/heard about/experienced. My mom's LS has been nothing but BS. Does your car have the notorious ABS and Traction Control lights on? My mom likes the car (probably because of luxurious interior) but it's a deep, deep money pit.

    33. 08-20-2009 03:43 AM #33
      Quote, originally posted by sandiegan »
      My mom has an LS and it had this exact same issue (I even had the car for a few weeks and took it in to get fixed). It is a common issue, and extremely costly to fix. The cooling fan is **** . Henceforth, sub-par reliability ratings from Consumer Reports for the LS/S-Type.

      Parts - $1025
      New motor and cooling fan assembly
      New Cooling pump assembly
      Seals etc.
      New coolant/flush
      Labor/Other - ~$700

      Total - ~$1800

      Happened at 90k miles. Buckle up

      Damn a kid I know sold his sidewhipped LSV8 for 1,500 which still ran 100%


    34. 08-20-2009 07:02 AM #34
      I had an overheating problem on my LS a while back, turned out it was the thermostat.

      It's sad that the car has such reliability problems, it was such a fun car to drive. I should be swapping mine out tomorrow for a new car. It's gonna be sad to say goodbye, I had some great memories with that car.


    35. 08-20-2009 07:23 AM #35
      deffinately go with the thermostat man had that happen 4 times in our 2002 ls v8 over the course of us owning it

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