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Bigblock496 12-12-2009, 05:58 PM Hey im new to the sight and like it so far. I have a 2002 chevy 8.1 with some mods. Im running 180 thermostat but after doing reading i see the Getsome8.1HD has a identicle truck to much but a 160 thermostat. Does anyone know where i can find a 160 stat? Thanks for the help Tanc Crusher 12-12-2009, 08:37 PM Check this post for some help. http://www.dieselplace.com/forum/showthread.php?t=326110&highlight=160+thermostat If not goto the Gasser section and hit the Search this Forum button and use ' 160 thermostat ' and check the other post. Brian GetSome8.1HD 12-13-2009, 05:03 PM Dont run it in the winter if its cold where you are. The 180* will be fine in winter. 160* is too cold for winter and takes to long to warm up making gas mileage drop. Bigblock496 12-14-2009, 11:09 AM Ok thanks for the input my problem though is were do I get a 160 I see you've got one but I've only been able to find 180's thanks for the info. GetSome8.1HD 12-14-2009, 03:26 PM Goto your local speed shop or I went to Jegs and ordered a Hypertech for like a 99 K3500 with a 454. Think part number is 1005. Heres where I got mine..... http://www.jegs.com/i/Hypertech/533/1005/10002/-1# Chevy2500HD8.1 12-14-2009, 08:56 PM Got mine at Autozone GetSome8.1HD 12-14-2009, 09:37 PM Got mine at Autozone A 160*? Quiky One 12-16-2009, 08:59 PM I run a 160 year round in my 5.3 as well as my moms 6.0. It gets down to the teens here and I have no issues. It heats up just as fast as the 195 but it stops warming up at 165. I run 168-172 year round. The trucks go into closed loop at 155. As long as you run above that you will be fine. In fact, my mileage went up... I run the SLP brand tstat. GetSome8.1HD 12-16-2009, 10:26 PM Mileage went up? Hmm. Also I bet its running more than 172*. Log it and see. Quiky One 12-16-2009, 10:44 PM I have an aeroforcetech gauge that always is reading it. A/C on in the summer on the highway it runs 172-176. Winter on the highway it hits 168 and stays there all the time. Summer without the air on it runs 170-172. It has been really consistant. I also have the clutch fan on the 5.3 and it keeps it running cooler since it is always spinning a little bit. Yes, my mileage went up. Call me crazy but I have logged it the last 30k miles...It is proven on these two vehicles. GetSome8.1HD 12-17-2009, 11:24 AM Well hey you certainly cant complain about that. Mines usually running bout 182* constant in the heat of summer. Havent logged in winter as I really dont care. Changing it out to 180* today as 160* takes too damn long to warm up. I swear my mielage has dropped since its gotten colder out. Couldnt really tell in summer but have since. Not that I get any mileage anyways. | ||