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Thread: Rising temp then returning to normal

  1. 8th October 2013, 05:44 AM #1
    Cracker97 Guest

    Red face Rising temp then returning to normal

    Any help would be great.
    I have posted a thread about this same issue before, but thought it was resolved. After a lot of work and money, I still on random occasions (manly when at low speeds, diff lock in) see a slow climb in temp to just under the upper white line. As I keep driving ( at same speed or load ) the temp will then drop straight back down to normal, below 1/2 way???

    Work to date done by myself and mechanics includes,
    New temp sensor
    New alum radiator
    New thermostat, 88 deg
    New fan
    New thermo fans on A/C
    Engine flush
    Valve replacement to repair engine miss
    3 faulty injectors replaced
    Vacuum advance unit replaced
    Tuned
    New 2.5" exhaust

    After all this I still get an increased temp and fall, about to order a hi flow thermostat, as it only seems to occur under load.

    Can anyone offer anymore clues on what to check next, or recommend a good mechanic to give a once over and test please.

    Thanks in advance
    Cracker
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  2. 8th October 2013, 11:15 AM #2
    jazzaD1's Avatar
    jazzaD1
    jazzaD1 is offline Master Subscriber
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    slipped liner or cracked block maybe?
    have you tried a different temperature gauge? the factory one isn't know for its reliability
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  3. 8th October 2013, 11:42 AM #3
    Judo's Avatar
    Judo
    Judo is offline ChatterBox Silver Subscriber
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    Electrical? Maybe an earth problem. Only need a slightly poor connection and the resistance of the sender will appear different to the gauge.
    - Justin

    '95 Disco 300TDI - sold
    '86 County 110 Isuzu
    2006 Range Rover Vogue td6
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  4. 8th October 2013, 11:43 AM #4
    Kevin B's Avatar
    Kevin B
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    I was going to suggest a Aftermarket Temp Guage as well, mine has the same problem, needle rose to almost 3/4 then back to normal, i put in a new aftermarket temp guage and while it still rises the guage only shows it going to 92deg max before it goes back to 88deg, another good investment is a Thermal (laser) Themometer, it gives a good indication of what various parts of your engine are doing.
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  5. 8th October 2013, 01:29 PM #5
    Cracker97 Guest

    Smile

    Thanks
    I have been thinking of a proper gauge for while.
    I forgot to add Airtech snorkel as well to the list. I,m doing everything I can to get cool air in and hot out better. Hoping it saves a few litres of petrol as well and a couple of extra HP,s. Sounds bloody great but. Peter at Newcastle Muffler service sure knows how to improve the factories work....

    Cracker
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  6. 8th October 2013, 01:46 PM #6
    Cracker97 Guest
    Has anyone added an Engine watchdog?? Are they worth the extra cost over the normal type of temp gauge.
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  7. 8th October 2013, 02:03 PM #7
    Cracker97 Guest
    Has anyone added an Engine watchdog?? Are they worth the extra cost over the normal type of temp gauge.
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  8. 8th October 2013, 05:28 PM #8
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    SouthOz
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    Ive fitted one of these. Very happy with it.

    Engine Sensor Watchdog Overheating Temperature Gauge Alarm Relay Control Cooling | eBay

    Dave
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  9. 8th October 2013, 05:59 PM #9
    Judo's Avatar
    Judo
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    I fitted a VDO mechanical temp gauge. Sender is a straight swap without adapters. Just need to mount the 52mm gauge somewhere. Being mechanical it can't suffer from electrical issues.
    - Justin

    '95 Disco 300TDI - sold
    '86 County 110 Isuzu
    2006 Range Rover Vogue td6
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  10. 8th October 2013, 06:35 PM #10
    Tombie Guest
    Water pump? Genuine? Recently replaced?
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