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Thread: Excessive seatbox heat

  1. 17th February 2019, 03:49 PM #1
    TOR
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    Excessive seatbox heat

    Hi everyone I have a 300tdi 130 and on a recent trip away I noticed a lot more heat than usual through the seatbox. I was towing a smallish trailer.

    It was pretty uncomfortable in the car and I’m not sure what could be causing this all of a sudden. Just before I left, I have changed all fluids, the injection pump has had a small tweak and I have a different front bulbar. Now I’m wondering whether I have decreased airflow under the car from the bullbar? The car is running hotter with the pump tweak? Or maybe the gearbox is hotter with the new oil?

    Anyone have any advice on this one?
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  2. 17th February 2019, 09:19 PM #2
    DiscoMick Guest
    Towing probably caused it.
    Did you change a filter in the gearbox?
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  3. 18th February 2019, 06:25 AM #3
    TOR
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    No I didn’t, should I have? Other than the fact it’s uncomfortable, is it a cause for concern? Could the transfer case or gearbox be getting too hot?
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  4. 18th February 2019, 12:24 PM #4
    DiscoMick Guest
    Has the transmission been serviced?
    Does your transmission have an oil cooler?
    Some transmissions have internal filters which need to be changed or they block up. I don't know if that applies to yours, but it did to our D1 300Tdi auto.
    A good transmission service with a full flush and any required filters plus fresh oil might be a great idea for longevity and peace of mind.
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  5. 18th February 2019, 12:29 PM #5
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    rick130
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    Quote Originally Posted by TOR View Post
    No I didn’t, should I have? Other than the fact it’s uncomfortable, is it a cause for concern? Could the transfer case or gearbox be getting too hot?
    No, you can't access the filter in the R380, it's just a small strainer that can only be cleaned in a major overhaul.

    Heat wrapping the exhaust from the dump all the way back to the t/case really reduces heat soak into the cabin.
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  6. 18th February 2019, 02:31 PM #6
    TOR
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    Transfer case and gearbox oil have both been replaced just before I went away. Mechanic has used Penrite transgear 75w 80 for both.
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  7. 18th February 2019, 02:47 PM #7
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    Don 130
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    I made a double layer heat shield to go between exhaust and floor. That fixed it.
    don.
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  8. 18th February 2019, 02:47 PM #8
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    Don 130
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    I made a double layer heat shield to go between exhaust and floor. That fixed it.
    Don.
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  9. 18th February 2019, 05:03 PM #9
    TOR
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    Quote Originally Posted by Don 130 View Post
    I made a double layer heat shield to go between exhaust and floor. That fixed it.
    Don.
    Thanks Don, was yours hot to the touch before you made the heat shield? I'm thinking maybe the exhaust is throwing out additional heat after the pump tune and this could be responsible.
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  10. 18th February 2019, 07:00 PM #10
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    Don 130
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    My opinion is that a pump tweak could increase exhaust temps, but someone much wiser than me might give a better explanation. I made the heat shield after a desert trip, when the seatbox and floor were too hot to touch.Outside temp was over 40˚C, 4 people, we were on sand, the aircon. was on, the tray was full of gear and we were pulling a 1 ton camper trailer.We were away for 3 months. I've since tweaked the pump, and the floor remains bearable.
    Don.
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