Question about 2000 Isuzu Rodeo

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2000 isuzu rodeo V6 3.2l thermostat replacement

Whose the genius that decided to put the thermostat in the center of the engine! How is it supposed to be removed?

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  • morzy Aug 19, 2008

    Don't know about that. Lets say i certainly am getting that "sinking feeling."

  • Jim Martz
    Jim Martz Aug 25, 2008

    Where is the thermostat? How do you replace it??? Mine is stuck closed!!

  • rev19762002 Dec 07, 2008

    I just purchased a thermostat and need to know where to change it.

  • Rick Dec 07, 2008

    I have the same issue on a 1999 V6 Rodeo. Rediculous engine design. By the way, to the guy that said "same people who bombed Pearl Harbor". Have you ever looked at the "Built in.." sticker on the rear door windows? Made in INDIANA, much of which was designed and built by GM - The same company which is now asking us to bail them out of the financial position they've created for themselves.



    Anyway, I have the same issue with my thermostat needing replacement. I have a Haynes book on the vehicle but the info in there seems sketchy at best. Local shops around Denver want anywhere from $140 to $240 at the dealer (Tynan's in Aurora, CO) just for the labor to install the thermostat.



    While this vehicle has been pretty reliable, and I have 200k miles, the exorbitant costs for minor repairs leads me to believe this is at least one reason why Isuzu has not been successful in the hottest vehicle market in America. Too bad Isuzu execs don't get how easy it would be to make these vehicles big sellers in the U.S. Hey Joe Isuzu, you guys hiring??

  • 2b-banjo Jan 19, 2009

    Have low coolant temp. is at 155 deg. Will need to replace the thermostat also. Looks like a night mare!!!!

    Anyone do the change, any help would be appreciated,

    2b-banjo

  • morzy Jan 28, 2009

    Who is the genius , ok can't spell sorry.

    anyway 100-300 dollars is a good deal considering all the labor involved. The Haynes manual i have doesn't really go into to much detail on how to replace this thermostat, or for that matter how to disassemble the fuel injection system. So there it be under the intake manifold. Had a mechanic do it, his bloody knuckles hate me, and my car now. P.S If your having this repair done, or happen to be the aforementioned genius, might i suggest drilling a small hole in the thermostat to prevent vapor lock and replacing all those little hoses under the intake manifold. Some of those buggers are hard to find so order early. Cheers

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Well, as you said, Isuzu engineers are not the brightest. We are in the process of trying to figure out how the oil got full of water! If anyone has experience in the 3.2 V6 2000 model and where the likely failed spot for the cooling system is, I'm all ears.
To your problem, the thermostat housing is located under the intake manifold, yes under it. You will have to remove the intake and fuel injection system (lots of fun) to get at the hard pipe lines under and in the front of the engine. Once there removal and replacement of the thermostat is easy.

Posted on Jan 27, 2009

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  • yoooh69ml154 Feb 20, 2011

    Water in the oil system sounds a lot. Like a blown headgasket has it been overheating?

  • _-__-___-_
    _-__-___-_ Oct 27, 2016

    if the VIN W or X engine ,DOHC thermostat gasket fails
    see this photo, best is to look first
    the wide DOHC heads were fitted on the old block . and must have a huge new intake plenum. (it really sucks big time air )
    MUST
    but guess what, not a new engine block
    id put a racing line thermostat and housing on it up front.



  • _-__-___-_
    _-__-___-_ Oct 27, 2016

    i can hear the sounds, of anything
    what will be will be, fate, runs world not ****** statistics.
    water can reach oil for many reason
    blow head gasket. (4 tests for that ask)

    or you or previous owner runs water for coolant and WINTER ICE cracks head , block or both,
    done many like that.
    here is the early 3.2 and later 98+
    as you can see the VALLEY does NOT Go to the PAN, at all, one hole there is the knock sensor. also burried deep.





  • Anonymous Oct 27, 2016

    if you drain the coolant first, there is far less mess.
    The gringos what max power, so you got new heads. and this is the price,. complex stat.

  • Anonymous Oct 27, 2016

    if I had water in oil
    compression test.
    then , leakdown test and find out if air
    lands in the oil side.(sonic tests for hisssssss)
    if yes, can be cracked head. or block.
    but warped heads top list.

    you can hear the hisssss in these places
    oil filler
    dip stick tube.
    exhaust ports
    intake ports,
    or even at the head/block juncture.
    so did you overheat it???????
    or run pure water as coolant not 50% AF

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Posted by Morzy on Aug 18, 2008


i bet he sold this dog.
correct if poster thinks this is hard.
try some water pumps on FWD cars.
my guess, is OP never heard of a the factory service manual.
it covers all that, mine is 8000 pages long.
but one page on this. hark.

Posted on Oct 24, 2016

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Under the intake and I am going to agree with Moterhead 1 on the not so bright comment and might I suggest replacing the hoses that go from intake as well hope you have a mechanic in the family or get a loan LOL

Posted on Oct 24, 2016

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1 Answer

I put antifreeze in my ford windstar and it poured out as fast as i was filling it from the back of engine. Underneath. Could it be whose or something major?


most likely it is a rusted out welsh plug
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get in a mobile mechanic with experience on your make of vehicle to find the leak and quote on the repairs cost and then decide where you want the job done
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How do I solve overheating?


First, find the problem.
When the engine is running, whenever it reaches the temperature of the thermostat, that thermostat is supposed to open, allowing the hot coolant to flow to the radiator, to maintain proper engine temperature.
The thermostat could be stuck closed, needing replacement.
Whenever the engine gets warm, there is also an electric fan in front of the radiator, to cool the hot coolant in the radiator.
This fan works off a sensor that is ******* into the engine block (whose function is to read the engine temperature) and sends an electric signal to the electric fan to start when needed.
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What is the effect of removing the thermostat?


Your thermostat may not be opening all the way,are you losing antifreeze,first check your water pump and see if it's leaking,if it is then water pump needs replacing or it's seals are bad and not circulating,if you remove the thermostat,put it in a pot of boiling water and see if it opens at 180 degrees,suppose to check new one this way too. here's a link on replacing the thermostat. SAVE 20 GET 10 GIFT CARD ON ONLINE SHIP TO HOME ORDERS OF 100 OR MORE Here's another link on replacing your water pump. SAVE 20 GET 10 GIFT CARD ON ONLINE SHIP TO HOME ORDERS OF 100 OR MORE

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What happen when I remove out the thermostat?


the thermostat opens and closes to allow the coolant to flow in when it's supposed to and out to cool the engine and keep the engine temperature steady. The part is there for a reason and purpose. I would replace it before you have an issue.

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1994 dodge spirit overheats in slow traffic.


I assume you have the 2.5l 4-cylinder engine. These engines have an inherent design flaw that causes this problem. I came up with my own solution, and it has worked well for me. If the dealer says you need to spend mnoney on repairs, he's probably wrong. These cars are designed to overheat in traffic.

The thermostat (the thing that is supposed to open and allow hot coolant to circulate) is located in a housing on the front of the engine, on the top right as you look from the front of the car. If there is any air in the system (and there always is), it accumulates here and forms an air pocket. When the air pocket prevents the hot coolant from touching the thermostat, the thermostat doesn't open and the car overheats.

At the factory, the cooling system is filled through the small housing and then pluigged. Unfortunately, the plug is aluminum, as is the housing, and once it is torqued down, you will never get that plug out again.

I drained the coolant, removed the thermostat, stuffed a rag in the coolant housing to prevent any chips getting into the cooling system and damaging the water pump or plugging the radiator, and drilled through the center of the plug. I then threaded the hole and inserted an allen-head brass plug. Now you can remove the plug, fill the cooling system to the top, and not have to worry about it. I am always sure to remove the plug every couple of months and refill, since air always finds its way in.

2 other issues contribute to the overheating problem: 1. The sensor that goes to the temperature gauge is also inside the thermostat housing, but the sensor that turns on the cooling fan is located in the engine block. The reading on the temp gauge therefore is not what the system uses to decide when to turn on the fan. 2. The fan settings from the factory do not turn on the fan until the engine temperature is very close to overheating. The only way around it is to run the air conditioner, which will turn on the fan when the compressor is on, bypassing the regular cooling fan.

There is no perfect solution, but that is what I have learned from 15+ years of owning and repairing these vehicles.

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