Less effectiveness is a good point but would unlikely be a deterrent for me. The car doesn't get driven unless it's below 85 and dry. Guess I have some more research to do. Thanks for the info jetjock/Adjuster.
I can't explain how it works (I can guess), but I can tell you that I saw a drop in coolant temps with a Defi gauge. Here's what I noticed with the plate in:
- It took longer for the temp to reach 90C from a cold start (this observation was over several nights)
- When the thermostat opened...
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