Anyone fitted a lower temp thermostat? M62
G'day Guys,
So my issue is that the other week I towed my XJ Jag back from Gympie to Hervey Bay, and just as I got out of Maryborough the gearbox went into limp mode where it wouldn't get past 3 gear at 100kph. Now I know that is caused by gearbox high temp.
I was looking at adding an extra gearbox oil cooler in the future to keep the temp down. (The trailer would have been near the 3 tonne mark)
But I drove back to Gympie the other day without a trailer and hooked up my scanner to monitor the gearbox and engine temp on the way down. HOLLY CRAP I didn't expect the engine to level out at 118 degrees on the highway! It was steady at 105 degrees on the way from Hervey Bay to Maryborough, so I thought "a little high for my liking but ok" but when I was at a steady 100kph on the highway after 5 min she steadied out at 118 on the engine and 119 on the gearbox. Now that is too much for me. The cooling system is fine with no issues, fans are working, no leaks and plenty of fluid.
So I'm now looking at dropping my engine temp instead of the gearbox. I seen a 80 degree thermostat conversion online for about $120 from the EU but has anyone tried it and does it work? Or any other ideas for lowering engine temp will be appreciated.
Cheers Steve
04 L322 Vogue V8 - Work truck
07 Freelander 2 TD4 SE - The wifes
74 Leyland P76 Targa Florio - Aspen Green
91 Kawasaki GPZ900R
Previous LRs = 78IIa series - 81, 93, 95 RRC - D2V8
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