I finally get my dealership timing belt debacle dealt with, and now I notice the temp gauge dropping at stoplights. It has been cooler so I thought that was the main reason for the temp fluctuation, but during my 2 hr highway commute last night (68F Ambient Temp) the gauge is still behaving the same. Gauge may drop slightly while driving as well as at idle. I had suspected something was amiss on Friday (mid 40s Ambient) so I used VCDS to monitor my coolant temp during part of my drive. It never got above 75.6C (~168F) during that drive. I ended up logging the 2nd half of my trip last night, and the results are in the graph below. I am so NOT looking forward to doing the thermostat on this car from what I've read!
I find it strange that this started after I had the dealer do the timing belt/water pump/coolant service at 120K, but oh well I guess it's time to get dirty! I've looked at the pointers here and on the myturbodiesel.com site so I feel confident going into this repair, but if anyone else has any other pointers please feel free to share. I'll be gathering the parts and post up my progress as I can get to it. Thanks!
PS: I was not using my winter front for either data gathering session. I did encounter a regen around 3/4 of the way through the drive last night, and you will see that peak and drop off in temp on the graph as well. Interesting.
I find it strange that this started after I had the dealer do the timing belt/water pump/coolant service at 120K, but oh well I guess it's time to get dirty! I've looked at the pointers here and on the myturbodiesel.com site so I feel confident going into this repair, but if anyone else has any other pointers please feel free to share. I'll be gathering the parts and post up my progress as I can get to it. Thanks!
PS: I was not using my winter front for either data gathering session. I did encounter a regen around 3/4 of the way through the drive last night, and you will see that peak and drop off in temp on the graph as well. Interesting.