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6.4 hemi thermostat
Thanks for the replys at this point my dealer won't do anything the tech said they usually fail in open positions- Skyline
- Post #4
- Forum: Heavy Duty
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6.4 hemi thermostat
my 2018 2500 tradesman 6.4 just under 10,000 miles. Over the last few weeks I noticed I have to constantly turn the heater temperature up and down . So yesterday change display to read temp was 18 f. Out side driving on rural highway at 55. The temp ran up to 217 tstat would open temp drop...- Skyline
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- Replies: 3
- Forum: Heavy Duty
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Valvoline 0w40?
5-40 synthetic mst is what valvoline recommended said it met anti shear spec for 6.4 hemi. I think it is as close as they have in a 40 grade- Skyline
- Post #13
- Forum: Heavy Duty
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Valvoline 0w40?
I emailed valvoline a few weeks ago they said for my 6.4hemi 5-40 mst synthetic was there recommendation.- Skyline
- Post #10
- Forum: Heavy Duty
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