| Oil cooling insight [message #324753] |
Mon, 09 October 2017 13:35  |
Hal StClair
Messages: 971
Registered: March 2013
Location: Rio Rancho NM
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I ran into an interesting observation with engine cooling and the effects of oil temperature. On our Diesel swap I'd by passed the radiator cooling heat exchanger for a couple of reasons. First was because the cooler blocked much of the lower radiator flow which is a real no no with the 6.5 TD. GM went to great lengths to improve H2O flow in 1997 with dual thermostats revised water pump and flow. I didn't want to impair the flow so I crushed the cooler to gain area for H2O. I then added a large air to oil heat exchanger in front of the cooling stack (radiator, charge air cooler). The oil temps seemed to run higher than I liked in hot weather pulling long grates, approaching 250 degrees. I run Rotella full Synthetic so the temps are in line but more than I like.
Anyway, I recently added an additional oil cooler in line with the first cooler. As space is getting to be at a real premium up front, I mounted it in the drivers side wheel well behind the brake prop valve. It has a 12 volt fan behind it thermostatically controlled. I added an oil thermostat after this cooler (I know, a little unconventional).
The results have been nothing short of amazing. I know oil plays a huge part in cooling our engines but didn't expect such a dramatic change.The H2O temps never moved off the stats 195 degree setting and the oil never exceeded 210 (200 degree stat) and the 12 volt fan never came ran on the aux oil cooler. This was with an ambient temperature near 95.
Couldn't be happier with the results and very surprised.
Hal
"I enjoy talking to you. Your mind appeals to me. It resembles my own mind, except you happen to be insane."
1977 Royale 101348,
1977 Royale 101586, Diesel powered,
1974 Eagle Bus 45',w/slideout,
Rio Rancho, NM
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