i have a 91 teg, and i'll drive around then my car warms up.. needle is under the half mark.. normal temp.. so then i get home, park it for the night in the garage.. next day, lets say around 12 or so, i start it up.. gauge is at C for cold.. i go up the street, with in 2 mins, the gauge gets to the same mark it did the day before..

so should it get cold or should it get warm that quick? i was thinking the fluid in the block is still warm.. so when i start it up, it just flows through and warms up the fluid in the radiator?

also i waited 2 days then did the same test... results were the same..

why?

 

bump

 

hows the coolant level? does the needle go any higher than normal?

 

level is good, and i had it head up at one time, not bad though, just a little past the half needle.. so i replaced the thermastat and it actually ran cooler then it did be4 it started over heating.. so its running cooler now.. just wondering why my car can sit for 2 days and i start it back up.. let it run for 2-5 mins or so, and it gets up to the normal temp.. like during winter, it took like 1-2 mins for the gauge to go up to normal temp.. usually u have to run it for 10 mins or so then it'll get back up..

but mine doesnt.. just wondering why..?

also my mom parks in the garage with me, and she has a 89 mazda truck, and hers has to warm up or whatever.. alot longer then mine does when she starts it up.. but mine just takes 2 mins or so

 

bump

 

Compare your results with that of a cold start and warm-up while only idling. It should take much longer. Driving will use from 30-100% of your engines max power, while idling will use only a few percent to drive the accessories. The heat produced and absorbed by the coolant will be in direct proportion to the load so you should notice the difference.

If your thermostat is functioning correctly, it should produce a short warm-up before holding the correct temperature. Thermostats on their way out usually produce longer warm-up times because they bind a little and may not fully close. This would let cold coolant from the radiator in and all that extra volume will need to be warmed up as well, which is why it would take longer.

 

well i know that but im wondering why does my car take 1 min or 2 to warm up after i start it.. be it 1 day or 2 days, ive done both.. and the car warms up in under 3 mins.. while some other cars.. takes longer..

im thinking is it the fluid in the block still nice and warm and mixes with the radiator fluid making it warm alot faster?

i just dont know why mine stays warm all the time and if its good or bad

 

Check your RPM when u start the car. Some cars are juz chillin a little higher than idle RPM while some revs up. Mine sometimes goes to 2000 RPM and stays there.

And no, i could drive my car for less than 2 mins to warm up the engine.

Fluid in the block is kept there until it reaches a certain temperature. THen it releases out into the radiator and draws the fresh cooler in. and this process repeats itself until the fluid drawn from the radiator is too hot for the engine to keep it in. Then it will recirculate continuously.

I didnt think my reply was very helpful.. but thats my 2 cents

 

If it's fairly warm or hot outside, a cold start will put my RPM a bit under 1500 (1300-1400 depending on ambient temp). In the winter when it's below 40 deg. F a cold start has the engine idling as high as 1700-1800. Usually while driving around my needle is just a little bit past the mark to the right of C (i.e. on the guage there is C, then the big fat mark, then the range up to the mark before H, and my needle usually sits just above that fat mark by the C while driving). If the car sits idling for awhile after driving, it will get up to a little below half.

 

Normal: Aluminum block and open deck design warms up pretty fast. Coolant is circulating all around the sleeves so makes for good heat transfer.

You mom's Mazda probably has an iron block with small water jackets... poor for heat transfer. On the plus side the Mazda should keep warmer longer when you shut it off since iron has a higher thermal capacity than aluminum.

 

so my block is almost like an insalator for the fluid and keeps it warm for a bit longer then the iron block of my moms truck?

 

every car is different, my teg takes about the same time as yours, probably more like 4-5 minutes, but pretty short. Look at a manual or if the sticker is still on your hood check that. It should have warm and cold idles. If your throttle cable is too tight or your idle is set too high the RPM's will be faster than your mom's or your friend's car and will heat the engine faster. Like I said every car is different, and if the needle gets to normal temp and stays there I say leave it alone whether it gets there quickly or slowly, car's are always better running warm so you have a positive not a negative situation.

 

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On the contary, aluminum conducts heat very well so it does not retain the heat. The iron is the opposite.

The open deck + aluminum results in good heat transfer to the coolant and it is warmed up really quick. Be happy that you car warms up quick, it's much more efficient when it's at operating temperature.