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Thermostat working?
On a freshly rebuilt 2.7 S, how long should it take for the engine to reach operating temp (say 180 degrees) if the thermostat is working properly? It seems that even after 15 minutes or more, the engine is still warming and never reached 180 on a 78 degree summer evening.
The temp sending units (there are two, one for the dash gauge and one for the ECU - its fuel injected now with ITBs) display within 5 degrees of each other. |
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Seems they don't fail often but in my case it wasn't hard to test it and it worked as designed. Maybe yours isn't working correctly as my calibrated gauge shows temp after 10mins atleast.
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1985 944 2.7 motor,1989 VW Corrado 16v,57 project plastic speedster t4 power,1992 mk3 Golf,2005 a4 b7 qt avant 3.0 tdi,1987 mk2 Golf GTI,1973 914,2.2t to go in. Past cars, 17 aircooled VW's and lots of BMW's KP 13/3/1959-21/11/2014 RIP my best friend. |
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Thermostat tests.......
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DB, You need to physically test and observe how they slide under thermal tests. Do they open fully or partially? Not until you have physically observed how they work, you will be just guessing or hoping everything is OK. Unfortunately, you can not rely on LUCK all the time for your troubleshooting. Test and confirm. A set of test result or data is more reliable to have and make your conclusion. Tony |
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Straight shooter
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20-30 minutes of soft driving warm up is not unusual to get to temp.
Sent from my SM-T580 using Tapatalk
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“Of the value traps, the most widespread and pernicious is value rigidity. This is an inability to revalue what one sees because of commitment to previous values. In motorcycle maintenance, you MUST rediscover what you do as you go. Rigid values makes this impossible.” ― Robert M. Pirsig, Zen and the Art of Motorcycle Maintenance: An Inquiry Into Values |
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To properly test, toss the thermostat in a pot of water and heat while watching. Use a meat thermometer to see the temperature.
But for your concern, it would have to be stuck open, rather than not opening. Should be easy to see if you remove it. With ITBs access ought to be a breeze.... on a 3.2, it sucks.
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'88 Coupe Lagoon Green "D'ouh!" "Marge - it takes two to lie. One to lie, and one to listen" "We must not allow a Mineshaft Gap!" |
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