BigD's94,
Congrats on the vert, they’re sweet!
Your temp reading of 233° sounds about right if it’s a hot day and you are idle in traffic. The temp reading coming down after you begin moving forward is the norm, air begins moving over/through the radiator and starts to cool things down. If I recall correctly, I think my temp hovers in the 198°-215° in traffic. I’ve seen as high as 230° on hot, humid days. I think the cooling fans are set to come on around 230°.
On the C4 there are some things to check to make sure you don not have blockage of the radiators surface:
While in front of the car, lay on your back, slide underneath the front bumper so that you are looking up into the opening for the radiator. You should see the fins (have a flashlight handy). If you see a plastic shopping bag or dried leaves from last autumn remove them. I use long paint brushes to dislodge anything that is stubborn. Be gentle if you do this as the fins bend easily. The C4 is a bottom feeder and is prone to picking up light items such as paper, plastic bags, leaves, etc. If you have items blocking your radiator, this will affect your coolant temp as airflow is being obstructed.
The second check you can perform is by standing on the passenger side and looking into to the inspections hole in the black plastic radiator shroud. With the hood up (have a flashlight handy) you’ll see an opening on the passenger side of the plastic shroud that will allow you to see if debris has accumulated. A flashlight should be used to get a good look in this area.
The third inspection can be done by removing the plastic radiator shroud and clean as needed.
During any of these steps, this would be the time to straighten out any bent fins. There is a tool specifically made for this. You should be able to purchase it at well stocked automotive parts store.
A habit to develop is that if you see a piece of debris (i.e. a plastic shopping bag) on the road in front of you and you pass over it, look for it to whip up in your mirrors to make sure you cleared it. If you don’t see it floating back down to the ground behind you, your car may have sucked it up, remove it as soon as possible.
Flushing may not be a bad idea, at least this way you know it was done (peace of mind) and can track the next service interval for it. As for pressure flushing, I’m not sure... someone will chime in here on that.
Hope this helps.
B17Crew
) I check for debris. Also, I do my damndest (wd?) to avoid anything in the road ( as far as debris etc..) but if I pass over something and I don't see it in my rear view mirror after I pass over it, well...I'm checkin'.
