Drilling thermostat - Page 4

**Halon** · 08-23-2007

The car seems fine at lower speeds, and worse at higher speeds. Just letting the car idle or sitting at stop lights lowers the temp.

As for the radiator, it did this on my old radiator, and this whole thing is the reason I bought the new radiator. Here is the one I have.
http://mishimoto.com/product_info.php?prod=mmrad-ecl-90 It's a couple months old.

I'll look into getting a new temp sensor asap. I'm going to update my first post as well to show everything I've done thus far so you don't have to siphon through a bunch of pages of crap.

Also, I have the thermostat currently completely removed.

**1ViciousGSX** · 08-23-2007

Quote:

Originally Posted by Halon

Also, I have the thermostat currently completely removed.

That might be your whole problem right there. Unregulated water flow can cause overheating at higher rpms. No time for it to cool down in the radiator.

**Halon** · 08-23-2007

It still does this, no matter if it's in there or not. I just took it out to give it a shot, and it still acted the same. Also, I guess I'm not sure what you mean by higher RPM's, but cruising on the freeway at 3500 rpm's is when this is the worst, and I wouldn't consider that high. I currently have 2 holes drilled in it. Maybe I'll just drill one more before I put it back in.

**1ViciousGSX** · 08-23-2007

I meant off idle when the flow is higher.

**JET** · 08-23-2007

Quote:

Originally Posted by Halon

The car seems fine at lower speeds, and worse at higher speeds. Just letting the car idle or sitting at stop lights lowers the temp.

This means it is not a normal cooling problem. If you just had a lack of cooling, then it would get hot around town. Do you have an EGT guage? This is one of the times that one may come in handy. Is it possible that the DSMlink timing isn't set the same as the engine? Running too much timing will raise the temp, as will running too lean.

TkrPerformance · 08-23-2007

this might be dumb but are the fans going the right way. craig had the problem of overheating down the road and the fan blades were not on the right way to push air from the front.

A//// Guy · 08-23-2007

Yea Im with Jet, that is not a normal overheating problem, sounds like maybe its either the sensor or its too lean at part throttle higher rpms?

**Halon** · 08-23-2007

I completely agree that it's not normal. Every cooling problem that I've ever had was around town, and it got better on the freeways with more air flow. This is also exactly why I put a vent in the hood despite others telling me "no, fix the real problem". Like I mentioned above, cooling temps are directly proportional to my EGT temps, and so my goal was to get a vent to give that hot air building up right there a way out.. As my EGT's go higher, my coolant temps go higher. Cruising on the freeway, my EGT's average around 675C. I have no clue if that is normal or not. I'll have to look again, but cruising on the freeway I'm usually pretty close to stoich, right at about 15.0. As for the timing, I'll have to research, but I do run a bit of timing now with Link since I've been adjusting my E85 tune. But this problem has been going on before I ever touched the timing. I am going to go read up a little, but does my timing adjustments on DSMLink, are those implemented always, or only under WOT? Also, this is all on E85, which should actually have my engine running cooler. Very odd. I'm going to replace the sensor and go from there.