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Thread: 82° thermostat? who's doing this and has it worked out for the long run?

  1. #11
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    Quote Originally Posted by ozscott View Post
    The D2 V8 runs too hot. The cooler thermostat is kinder to the block. Cheers
    Yeah im starting to get this impression.

    Since posting this ive stumbled across a south African land rover forum with a lot of people saying the same thing I've said in the original post. Maybe I'm just stressing over nothing? But the obd2 scanner will be the tell all.

  2. #12
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    Yep mate. With stock 3 way thermostat in Qld they sit on 90 to 95 most of the time and 103 to 105 in low range and higher offroad. Crazy. Cheers

  3. #13
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    Quote Originally Posted by ozscott View Post
    Yep mate. With stock 3 way thermostat in Qld they sit on 90 to 95 most of the time and 103 to 105 in low range and higher offroad. Crazy. Cheers
    Yeah I'm over here in WA so plenty of coastline to really work the ol girl. I don't really want to end up with a cooked motor in the middle of nowhere

  4. #14
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    My D2a V8 runs much hotter than the V8 in my 79 Series But after fitting the 82C thermostat and a bit of a modification on the grill the D2a seems to run a lot cooler than it did before So a for the 82C unit from me.
    As said by others the factory temp gauge is a complete waste of space on the dash and an OBD2 unit will give you an accurate reading, Also a low coolant alarm is a great idea for these engines as well.

    The 4l V8 also has a well known issue with the head gaskets which is another common cause of overheating and at 270K this could be what is causing your overheating problems and they may need to be replaced.
    You only get one shot at life, Aim well

    2004 D2 "S" V8 auto, with a few Mods gone
    2007 79 Series Landcruiser V8 Ute, With a few Mods.
    4.6m Quintrex boat
    20' Jayco Expanda caravan gone

  5. #15
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    2012 huh,, I wonder what has changed in a D2 cooling system since then,,
    oh right!
    Nothing!

    buy a genuine one, take pics before hand, (I doubt an RV8 has lasted this long without someone replacing the hoses, but now would be the time..) use GREEN coolant, test your engine fan, use that OBD2 dongle to check O2 sensors are working, STFT's are moving, and the MAF is in range.
    "How long since you've visited The Good Oil?"

    '93 V8 Rossi
    '97 to '07. sold.
    '01 V8 D2
    '06 to 10. written off.
    '03 4.6 V8 HSE D2a with Tornado ECM
    '10 to '21
    '16.5 RRS SDV8
    '21 to Infinity and Beyond!


    1988 Isuzu Bus. V10 15L NA Diesel
    Home is where you park it..

    [IMG][/IMG]

  6. #16
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    I didn’t think twice about installing a 78C thermostat in my new(second hand) 4.6L after the block split at 178k in my 4.0L.
    She cruises at 85-87 and up to 97 when things get a bit more difficult.
    I wouldn’t want to see it get any hotter than that.
    2002 D2 4.6L V8 Auto SLS+2" ACE CDL Truetrac(F) Nanocom(V8 only)

  7. #17
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    Quote Originally Posted by Pedro_The_Swift View Post
    2012 huh,, I wonder what has changed in a D2 cooling system since then,,
    oh right!
    Nothing!

    buy a genuine one, take pics before hand, (I doubt an RV8 has lasted this long without someone replacing the hoses, but now would be the time..) use GREEN coolant, test your engine fan, use that OBD2 dongle to check O2 sensors are working, STFT's are moving, and the MAF is in range.
    Want to give me the short & sharp run down on why to change it to green coolant? Something to do with not finding its way out of every nook and cranny like the red OAT stuff? (Spewin as i have new red penrite stuff to go in )

    Also, the new thermostat is a genuine LR unit, just the one Freelander one with the lighter spring.

  8. #18
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    Quote Originally Posted by shayne86 View Post
    Yeah i have read that a lot
    Believe it mate. Believe it.
    ​JayTee

    Nullus Anxietus

    ​Getting involved in discussions is the best way to learn.

    2000 D2 TD5 Auto: Tins
    1994 D1 300TDi Manual: Dave
    1980 SIII Petrol Tray: Doris
    OKApotamus #74
    Nanocom, D2 TD5 only.

  9. #19
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    Quote Originally Posted by shayne86 View Post
    .... Something to do with not finding its way out of every nook and cranny like the red OAT stuff? (Spewin as i have new red penrite stuff to go in )

    ....
    Penrite list the Blue coolant product as the correct type for LR vehicles in this age range(both V8 and Td5).

    Dunno why?

    A few years ago when I bought my 20lt drum tho, they listed the red stuff(G40) as the appropriate product.
    This is why I bought it.
    But later checking of their website shows they changed at some point from the Red (G40) product to the Blue (G30) product.

    I dunno what the previous owners had in brothers Td5, but it was green and one can assume that it wasn't OAT coolant .. just something that looked green, and probably the cheaest they could get their hands on.

    Anyhow, we flushed it out flushed it again, added the Red stuff I now have (way too much of!) .. and it dutifully began it's process of elimination .. as you said, found it's way to every nook and cranny it could escape from.
    Waterpump, fuel cooler, a few hoses ... etc. All fixed and now a few years later, all good.
    Arthur.

    '99 D1 300Tdi Auto
    '03 D2 Td5 Auto

  10. #20
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    Hi,

    I have the PEM101020 82° hard spring thermostat fitted and it works fine. These are still available from John Craddock according to their website.

    Cheers
    '00 D2 V8 The orange off road truck. 2" lift, made my own rear bumper, still working on the front one
    '03 D2a TD5 The silver on road daily driver

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