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Old 02-20-2011, 06:15 PM   #1
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Temp for diesel cat

Does anyone know normal operating temp on cat 300

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Old 02-20-2011, 06:18 PM   #2
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Welcome to the forum - My Cat 330 most often runs between 188 and 192. It will go higher in the summer when going up grades to 210 or so.

Bob, Sandi & Marmaduke the Big Pug
SW OREGON 2004 Journey 39K, 330 Cat
If towing: a 2006 Mini Cooper or 1995 Wrangler
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Old 02-20-2011, 07:01 PM   #3
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My cat 3126 in my 2000 Safari used to run between 180-210. I replaced the thermostats this past summer and now it stays at 190 downhill, uphill or where ever. Also seems to run better to me but the mileage is still the same.
George & Sue
On the road to someplace!
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Old 02-20-2011, 07:09 PM   #4
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I did some specification work for a public transit operation a while back. 195 degrees operating temperature was optimum for a diesel engine at that time. We spec'd vehicles with thermostats and radiator shutters to maintain that temperature as much as possible. I don't think things have changed since then. My ISB02 operates in that range.
'07 Winnebago Journey 34H, ISB-02, MH2500
Toad - '08 Ford Taurus X
Blue Ox, Aventa
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