Uberoo Posted February 8, 2008 Share Posted February 8, 2008 my subaru offroad toy the temp drops to stone cold when going about 50 mph or more when driving around.outside was like 20*F.My radiator is good.in fact right now from the front of the car you can see 100% of of the radiator core so that might have something to do with it.Anyway is Overcooling bad for the engine? Link to comment Share on other sites More sharing options...
screwbaru2 Posted February 8, 2008 Share Posted February 8, 2008 It's not good for the MPG's cold engines never run as lean as normal temp. I'd cover some of that rad. at least until the weather gets warmer. Link to comment Share on other sites More sharing options...
nipper Posted February 8, 2008 Share Posted February 8, 2008 Yes it is. The car never heats up so the engine will never run at peak performance. You will always run rich. Sounds like your thermostat is stuck wide open. nipper Link to comment Share on other sites More sharing options...
Skip Posted February 8, 2008 Share Posted February 8, 2008 Sounds like your thermostat is stuck wide open. nipper or missing entirely? Link to comment Share on other sites More sharing options...
nipper Posted February 8, 2008 Share Posted February 8, 2008 or missing entirely? That too.. another thing is that the oil may never get fully warm either. nipper Link to comment Share on other sites More sharing options...
ScottG Posted February 8, 2008 Share Posted February 8, 2008 And when the oil never warms up, not only does performance suffer, the places in the engine that need hot oil, may not get that oil. And the real biggie: oil pans tend to accumulate condensation, especially in the winter cold. Oil + water make a really bad combination for lubrication.....and a really nice mess for sludging. Furthermore, your PCV valve is likely to plug up with some really pretty yogurt-like glop. Get a new PCV valve from the dealer. Check you t-stat - get a new one, (at least a 180 degree one), from the dealer......don't waste your money on aftermarket stats & PCV valves. Your engine needs at least 160 to 180 degrees of internal oil temp for minimum efficiency, 190 in some engines. Link to comment Share on other sites More sharing options...
Skip Posted February 8, 2008 Share Posted February 8, 2008 very well put Scott!! plus your tootsies may suffer frost bite even in a off road toy Link to comment Share on other sites More sharing options...
[HTi]Johnson Posted February 8, 2008 Share Posted February 8, 2008 Yeah, doesn't it caause cylinder washing, causing damage to the sylinder wall? From running too rich? Link to comment Share on other sites More sharing options...
Uberoo Posted February 8, 2008 Author Share Posted February 8, 2008 when I start and drive it at low speeds it warms right up and settles about 1/8 of the gauge below the 1/2 mark.And the gauge didnt go to stone cold as I said eariler it was reading about 1/8 of the gauge. Link to comment Share on other sites More sharing options...
nipper Posted February 8, 2008 Share Posted February 8, 2008 when I start and drive it at low speeds it warms right up and settles about 1/8 of the gauge below the 1/2 mark.And the gauge didnt go to stone cold as I said eariler it was reading about 1/8 of the gauge. Whats the air temperiture? nipper Link to comment Share on other sites More sharing options...
one eye Posted February 8, 2008 Share Posted February 8, 2008 I have the same problem in my hatch, just after you start it and let it sit its fine it goes up to normal and stays. The minute you start to drive and get the wind blowing through it the heat goes away in the motor and worst of all inside the car it's self. It makes for a very cold ride. Jeff Link to comment Share on other sites More sharing options...
TomRhere Posted February 9, 2008 Share Posted February 9, 2008 I have the same problem in my hatch, just after you start it and let it sit its fine it goes up to normal and stays. The minute you start to drive and get the wind blowing through it the heat goes away in the motor and worst of all inside the car it's self. It makes for a very cold ride. Jeff Ditto with the '86 BRAT... 4 year old radiator, new heater core, new Subaru T-stat. Around town, good heat and just below 1/2 mark on gauge. Get out on the road at 50 MPH + and gauge drops below the 1/4 mark, heater is blowing luke warm.... I can watch the T-stat open/close while driving down the road and looking at the temp gauge. It'll rise then fall, then rise again, repeat... This is on a 32 mile trip one-way to work, coming home it'll do better in the temp department. Seems the cold morning air is cause, but I'll find out this weekend as temps are to be less than 10* for high temp around here and I have to work this weekend... Link to comment Share on other sites More sharing options...
Uberoo Posted February 9, 2008 Author Share Posted February 9, 2008 Whats the air temperiture? nipper air temp is in the 20's Link to comment Share on other sites More sharing options...
nipper Posted February 9, 2008 Share Posted February 9, 2008 air temp is in the 20's Then dont worry about it too much. My 87 would do the same thing in the 20's. It was so bad i would block half the radiator with cardboard to get heat. If it is above 30 or more (yes 10 degrees can make a differnce) then i would worry. nipper Link to comment Share on other sites More sharing options...
Uberoo Posted February 9, 2008 Author Share Posted February 9, 2008 I was just wondering if it would blow HG if it was too cold.actually it becomes quite warm in the car if I have the heat on,even if the engine temp is cold.must just be because when I cleaned the radiator out it also cleaned the heater core out so its more effiecient at extracting heat.Or maybe its just warm but its ok because I am already wearing a coat and warm clothes from being in the snowy moutains.either way Im fine with it not being super warm.and as far as fuel economy goes,im lightyears away from what my friends are getting in there full size pickups when they go wheeling...so Im happy. Link to comment Share on other sites More sharing options...
nipper Posted February 9, 2008 Share Posted February 9, 2008 A HG can blow whenever it feels like blowing. It's an old car. If it blows, you will know it. Too cold wont be a HG issue. If it does stay that cold, change your oil a little more often. Make sure your coolant is up to the task. nipper Link to comment Share on other sites More sharing options...
hooziewhatsit Posted February 9, 2008 Share Posted February 9, 2008 During the summer I'd measure the temps on my engine at around 190*F, ie, just right. Since it's been cold here (20's), I only measured ~160* in the same places as before. Last time I filled up I barely got 20mpg Granted that's around town in 4WD.... I'm planning to either remove the clutch fan, or block off some of the radiator. Not sure which I'll do yet... In theory the thermostat should keep the internal cooling loop at the proper temperature, if it opens & closes quickly enough. -Dave Link to comment Share on other sites More sharing options...
subaruguru Posted February 9, 2008 Share Posted February 9, 2008 my wheelin soob is the same way in town with the fan off it will sit at 170 with the fan on around town it sets at 140 on the highway at 50 no fan it runns about 160 with fan on high way 110:eek: but thats just for this time of year idk what it will do in the summer. i still have to put the other electric fan in Link to comment Share on other sites More sharing options...
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