Mishimoto Low-Temperature Racing Thermostat (MMTS-RAM-99L) - Compatible with Dodge Cummins 5.9L & 6.7L (1999-2013) Review

It did an excellent job on my Cummins keeping temperatures between 175-195 and towing 28,000 pounds. Worst of all, the spring and bottom washer fell off after 4,000 miles. Much better than Gates T-Stat when lifting weight.

My Cummins started to heat up and then cool down, I switched to this overpriced thermostat in hopes it would be amazing would have driven on the Autobahn first. I was overheated and didn't want to open. I installed it and it's been working fine ever since. 2 months later and still working perfectly. don't get involved. I put a star because they came back right away, maybe $$

. I installed one of these thermostats when building a Mishimoto radiator on a Cummings diesel. It worked really cool for a few days and then seemed to open later and later. He adjusted the opening from 205 to 210 and kept the car temp around 205 and obviously higher when towing. I let it run for a few months. I was frustrated that he was 180 stats and picking up the pace so much before I saw him open. I added an equivalent stant and it opens earlier and runs about 5 degrees cooler at 80 mph…

I installed in my 2004 piston diesel. So I went on vacation to tow a big trailer. I thought cooling would help. The thermostat fell apart, the washer fell off the bottom and clogged my cooling system. Horribly overheated until I got to an auto parts store in Tennessee and replaced it with a stock AutoZone unit. It cost me an extra day on the road. I missed my 50th Annual Fourth of July River Walk while on vacation. Cost me hundreds of dollars and nearly cost a diesel engine pulling out a small…