importwarrior Posted June 20, 2015 Report Share Posted June 20, 2015 When driving on the expressway Temp is about 190 to 200Temp in stop n go traffic is about 205 to 210 90 degree day. I have 180 TStat185 fan switch sensors fans work fine and are new.3 Row radiator Engine runs strong. Really only thing left to change is toRebuild the t body. Maybe a bad head gasket? No leaks of any kind. Kind of at a loss Link to comment Share on other sites More sharing options...
Preludedude Posted June 20, 2015 Report Share Posted June 20, 2015 Those temps seem fine to me for a 90* day Link to comment Share on other sites More sharing options...
importwarrior Posted June 20, 2015 Author Report Share Posted June 20, 2015 Just want to be sure Just that the 210 had me worried ALSOI just swapped in a new 180 stat. Same as previous one. Both had same readings. On temp gauge. Link to comment Share on other sites More sharing options...
Preludedude Posted June 20, 2015 Report Share Posted June 20, 2015 i would begin to worry once over 210. But up to that in traffic on a hot day is normal. Link to comment Share on other sites More sharing options...
scott87star Posted June 20, 2015 Report Share Posted June 20, 2015 No issue at all, 210 is fine. 220 is fine. 240+ is getting hot. Link to comment Share on other sites More sharing options...
importwarrior Posted June 20, 2015 Author Report Share Posted June 20, 2015 Ok then I feel I am good. Thank you all for your replies. Link to comment Share on other sites More sharing options...
StarquestRescue Posted June 20, 2015 Report Share Posted June 20, 2015 I do not really see a problem. Where is the fan temp switch located at? If you bring the fans in sooner it may run a little cooler on the freeway, but likely be about the same in stop and go. Link to comment Share on other sites More sharing options...
StarquestRescue Posted June 20, 2015 Report Share Posted June 20, 2015 Sensor and gauge error can be factor. http://www.homedepot.com/p/General-Tools-Laser-Temperature-Non-Contact-Infrared-Thermometer-with-12-1-Spot-Ratio-Maximum-Temperature-1-076-IRT657/202801066?cm_mmc=shopping-_-bingpa-_-25-_-202801066&ci_src=328768002&ci_sku=202801066 Link to comment Share on other sites More sharing options...
importwarrior Posted June 20, 2015 Author Report Share Posted June 20, 2015 Fan sensors are in the stock location. Great suggestion on the temp gun. Link to comment Share on other sites More sharing options...
ucw458 Posted June 21, 2015 Report Share Posted June 21, 2015 I run a 195 stat. On a 100 degree day with the AC on I've never seen the temp rise above 180. Logged with a GM temp sensor on my standalone. I have an aluminum radiator with all 3 fans wired together. Link to comment Share on other sites More sharing options...
psu_Crash Posted June 21, 2015 Report Share Posted June 21, 2015 UCW are you trying to say your thermostat never opens? Link to comment Share on other sites More sharing options...
ucw458 Posted June 21, 2015 Report Share Posted June 21, 2015 Quite the opposite actually. If you watch the temps on warmup you will see it spike to 195. Then the stat opens and the temp goes down to 176 and stays there. I've verified this with the standalone log and an infrared thermometer. My best guess is it takes 195 for the stat to open the first time then it never fully closes until the motor cools down. With a 180 stat I would expect lower operating temps then what a 195 stat runs at. If he's getting 200+ temps I suspect there is a problem. Sometimes a stat can fail slowly. You can see abnormally high temps for a bit before it fails completely. Broken stat, clogged radiator and inoperative fans are the first items I would check. Rob, I would suggest taking your stat out and verifying it works by putting it in a pot of hot water on the stove. At 180+ your stat should be fully open. If it's just barely open then it's failing. Link to comment Share on other sites More sharing options...
importwarrior Posted June 21, 2015 Author Report Share Posted June 21, 2015 OK I can try that.New radNew TStatNew fans. Went for a drive today for about 2 hours.Temps basically stay at 190 to 195Stop n go same as first post. Fans under powered possiblyShroud causing engine temps to be higher. Restricting flow through the radiator. Link to comment Share on other sites More sharing options...
ucw458 Posted June 21, 2015 Report Share Posted June 21, 2015 It's possible you got a bad stat. I bought one of those failsafe stats once and the engine overheated on the first use. There's a plastic diverter that goes between the air dam and core support. It directs air from the scoop up into the rad. Without that much of the air from the scoop goes under the car. I know many cars don't have that plastic diverter. Link to comment Share on other sites More sharing options...
Metric-man Posted June 22, 2015 Report Share Posted June 22, 2015 I would probably test any thermostat I replace first, that's interesting about the fail safe thermostat failing to open because their engineered to fail open not closed.There is a common misconception about thermostats and what temperature they operate by their designation.A 180F stat will just start to open just above 180Fand should be fully open at 195 - 200FThe whole idea of a radiator is to bump up the atmospheric pressure so the coolant's boiling temp it raised. Average 12 lb. system will raise the boiling temp to around 245F which is about 33 degrees higher than sea level.I agree test the stat, the cap, and pressure test the whole system. Link to comment Share on other sites More sharing options...
importwarrior Posted June 22, 2015 Author Report Share Posted June 22, 2015 I do have the scoop you mentioned. Fluid level is perfect. Seems that if the stat opens at 180 and is fully opened at 195 200Then the system must be OK. the temp gauge is right at 188 to 200 cruising. Link to comment Share on other sites More sharing options...
Metric-man Posted June 22, 2015 Report Share Posted June 22, 2015 http://www.crankshaftcoalition.com/wiki/Thermostats_explained Link to comment Share on other sites More sharing options...
Metric-man Posted June 22, 2015 Report Share Posted June 22, 2015 1988 Mitsubishi Starion 4-Cyl. 2.6 L Application Product Type Part # Comments Cooling SystemRadiator CapSafety Release Radiator Cap 10327 (13 psi) Check hood clearance prior to installing this cap OE Type Radiator Cap 10227 (13 psi) Racing Safety Release Radiator Cap 18327 (14 psi) Check hood clearance prior to installing this cap Racing Regular Radiator Cap 18227 (14 psi) Cap AdapterRadiator Cap/Cooling System Tester Adapter 12021 Cooling System AdapterRadiator Cap/Cooling System Tester Adapter 12027 ThermostatSuperstat Thermostat 45869 (195º) OE Temperature45868 ( 180º) Alternate TemperatureOE Type Thermostat 13869 (195º) OE Temperature13868 ( 180º) Alternate TemperatureThermostat GasketThermostat Gasket 25187 Thermostat Gasket (1 Pack) 27187 Fuel SystemFuel CapOE Equivalent Fuel Cap 10825 Regular Locking Fuel Cap 10595 Capless Adapter 41001 Fuel Cap Tester AdapterFuel Cap/System Tester Adapter 12410 (Threaded) Threaded adapter connected to tester Oil & Lubrication SystemOil Filler CapOil Filler Cap 10088 Link to comment Share on other sites More sharing options...
G54Bstore Posted June 22, 2015 Report Share Posted June 22, 2015 A 160 degree thermostat has to be ground down a little to fit Link to comment Share on other sites More sharing options...
M Code Posted June 23, 2015 Report Share Posted June 23, 2015 A couple of basics to check..1. Make sure the thermostadt is clocked properly in the water outlet housing, if not the water flow can be restricted2. If the thermostadt is >3-4 years old replace it with a good quality one, cheap insurance3. Make sure your radiator is clear, pull it and have it rotted out as the tubes can accumulate certain sediments that restrict water flow & cooling4. In my TSi, I chucked the (2) electric OE fans and installed a shroud/15" mechanical fan. With all of the electrical issues these cars have, why trust the cooling system integrity to sensors/relays/connectors that are >30 years old My TSi runs < 185 degrees in 90+ plus SoCal hot days in stop/go traffic with the AC on.. Just my $0.02... Link to comment Share on other sites More sharing options...
importwarrior Posted June 23, 2015 Author Report Share Posted June 23, 2015 1 TSTAT instaled per manual2 new TStat3 new 3 Row aluminum - No AC its removed4 shroud is sealed all the way around where it touches the radiator fans suck directly through the radiator my fans are real cheap. i am in progress of upgrading them. i don't think they flow well or close to the stock fans performance. Thanks for the help. Link to comment Share on other sites More sharing options...
Starfighterpilot Posted June 24, 2015 Report Share Posted June 24, 2015 Have you tested this forgotten engine cooling thermostat - the oil cooler bypass valve (engine oil temp thermostat) located in the oil filter adapter housing for the oil cooler yet, see FSM Page 9-52, piece No. 7? Remember, with a CLEAN operable engine oil cooler system, that it removes about 25 - 30% of the engine heat of friction & combustion. Guess what happens if the engine oil thermostat has gone to Starquest Heaven? The engine oil cooler is inoperative and ain't removing the engine heat from the oil. In the below link, altho the pictures are gone, PQ states that when he tested a good G54B T oil cooler bypass valve - it was shut, bypassing the oil cooler system, until it started to open at 2150 and was fully open at 2500 F. Ya might wanna check that. To test it get a electric hot plate, oven cooking thermometer, a deep metal pot and about a quart or so of engine oil and see when your bypass valve starts to open and is fully open. DON'T USE A OPEN FLAME TO HEAT THE PAN CUZ YOU MAY IGNITE THE OIL OR IT'S FUMES. http://starquest.i-x...37066456750aaf4 Also what is the solution percentage of anti-freeze to distilled water that you're running? The optimum solution for hot summers is 33 % antifreeze and 67 % distilled water. When was the last time that you flushed out the engine oil cooler? For What It's Worth. KEN Link to comment Share on other sites More sharing options...
importwarrior Posted June 25, 2015 Author Report Share Posted June 25, 2015 Great your reading my mind. I got the part number earlier today and will be ordering it. LoL Link to comment Share on other sites More sharing options...
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