My car's temp needle stays at half way mark...but lately it has started to go over a little. Could be that it's starting to get above 80 degrees here now.? What coolant do we use to fill IC tank. What radiator fluid do you guys use. 50/50 mixture?

 

That’s normal, if the needle is slightly over half as you depicted, your coolant temp is around 198-201 deg. I use the 50/50 from the dealership and distill water, greenish color 50/50.

 

Reposting my post here: https://www.crossfireforum.org/forum...ad.php?t=25258
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The correct antifreeze/coolant for all Crossfires is a HOAT (Hybrid Organic Acid Technology) coolant.

There are only a few commonly available coolants that are compatible with the factory fill coolant, in the United States, anyway. I think that there are more options, including a BASF formulation, in other markets.

1) MB part number Q 1 03 0002. 1 Gallon container. Owner's manual calls for this,or Zerex G-05.
2) Mopar Part No. 05066386AA. 1 Gallon of MS-9769 five year coolant. Part number from the service manual and Mopar chemicals guide.
3) Valvoline Zerex G-05 HOAT. Does not explicity meet MB 325.0, but Service manual says it is OK. Sold as both full strength and pre-cut 50/50 with distilled water.

Zerex is the best price of the three, typically $14.50 to $17.00 at Pep Boys or NAPA. My local Benz dealer gets $22 a gallon for its magic cooling juice, and my local Chrysler MOPAR dealer wanted $28 a gallon for their proprietary mix.

Unless the system is very, very, very, very, very well flushed of all old coolant, do not mix coolant technologies, stick with one of the above three part numbers (plus distilled water to fill the balance of the system) and you should be fine.

Click the image to go to my gallery page for the picture, which will then link to a (MUCH!) bigger version, sharp enough so you can read the mixing table on the back of the bottle.



NOTE: Factory fill is blue, Benz stuff is yellow or blue. Both are compatible.

 

It seems to me that 198-201 is a bit high for coolant temperature...

And I couldn't find the exact part number, but I'm pretty sure the coolant for the W203 (C32/SRT6) has a blue hue.
EDIT: ^^ He beat me to it.

 

I agree, that is high but these cars run hot at times. It’s not uncommon for my coolant temp read out to show 198-201 when that needle is above half way. I’m in the market for a t-stat because ideally those temps should stay between 182-187 .

 

Dumb question - where are you getting the temperature read out? My guage just shows H-M-L. All three pretty much run at the M or a needle width either side (lower in cold weather, a tad higher in hot weather and traffic). I've been in bumper2bumper traffic on a 90o day and the roadster only went a needle over the M.

 

I got my IAT and Coolant Temp from the Actron I had hooked up to my car...

 

my neon would stay at 200 untill i put my 180 tstat in... this seems normal to me. better burn with higher temps... more power with lower temps but from factory thats the way it is prob best for milage too

 

Datalogger, they are able to display multiple operations simultaneously for scrutiny. One of the operations I view consistently is coolant temps. If looking at your OEM coolant needle and its touching the bottom side of the halfway line, your coolant is around 190 degrees. If the needle is centered on the halfway line then the coolant temp is about 196. If the needle is touching the topside or over the halfway line, expect your temps to be 198-201.

 

I took my SRT6 to the local Mercedes Benz dealership for a full power flush and refill of new antifreeze fluid in November 2008, since my car was technically 4.2 years old at that time. The antifreeze color is Blue. The Mercedes Dealer is located in West Chester, PA.

The Chrysler Dealer did not offer a power flush, just a gravity drain of the fluid, so my choice was easy, go with the Mercedes service @ $125.00 and know it was done properly the first time.

Dennis