RedSRT4Me
Senior Member
- Joined
- Oct 28, 2015
- Posts
- 2,734
- Reaction score
- 2,087
- Location
- Scottsdale, Az
- Ram Year
- 2015 CC Sport
- Engine
- 5.7
So this past Thursday 4.7.2022 coincidencentaly
I had topped my overflow tank with coolant. It was in the 60/40 range with distilled water.
Driving the next couple days I noticed my temps increasing!!! 210 - 215°F. Friday into Saturday I'm up to 230°F on the freeway but ironically trans temp were icey for the 8speed at 177° F.
After careful inspection and consideration I had pin pointed the issue to being a faulty thermostat.
I spent a couple hours flushing the system with both the overflow and the radiator. Disposed of the coolant properly of course. Used tap water for the flushing.
Due to my situation I used premixed Prestone 50/50 yellow 300,000 mile blah blah blah.
I went with Duralast 180° thermostat this round. Tuned for it already so it was plug and play. Made sure to have the cylinder head clean before installation.
Needless to say I'm very happy with the results!!! Truck is very happy. No head gasket issues so far but I'll keep my eye on it.
I am disappointed with this Mishimoto 180° thermostat. It's less than 4 years old and failed already. It's common knowledge thermostats should last closer to 10 years.
My diagnosis is the gasket of the thermostat failed causing the thermostat to get suck so far into the cylinder head that coolant transfer was impossible. I'm just grateful it didn't cost me a rebuild.
I've included a couple pics of the failed unit
I purposely didn't wipe anything on the tstat for documentation purpose. I wanted zoomed in photos as well.
For $50+ I don't recommend this product based on this experience. My replacement was half the cost.
So far so good about to click off 130,000 miles.
I had topped my overflow tank with coolant. It was in the 60/40 range with distilled water.
Driving the next couple days I noticed my temps increasing!!! 210 - 215°F. Friday into Saturday I'm up to 230°F on the freeway but ironically trans temp were icey for the 8speed at 177° F.
After careful inspection and consideration I had pin pointed the issue to being a faulty thermostat.
I spent a couple hours flushing the system with both the overflow and the radiator. Disposed of the coolant properly of course. Used tap water for the flushing.
Due to my situation I used premixed Prestone 50/50 yellow 300,000 mile blah blah blah.
I went with Duralast 180° thermostat this round. Tuned for it already so it was plug and play. Made sure to have the cylinder head clean before installation.
Needless to say I'm very happy with the results!!! Truck is very happy. No head gasket issues so far but I'll keep my eye on it.
I am disappointed with this Mishimoto 180° thermostat. It's less than 4 years old and failed already. It's common knowledge thermostats should last closer to 10 years.
My diagnosis is the gasket of the thermostat failed causing the thermostat to get suck so far into the cylinder head that coolant transfer was impossible. I'm just grateful it didn't cost me a rebuild.
I've included a couple pics of the failed unit
I purposely didn't wipe anything on the tstat for documentation purpose. I wanted zoomed in photos as well.
For $50+ I don't recommend this product based on this experience. My replacement was half the cost.
So far so good about to click off 130,000 miles.