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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHLow temp thermostat - which one
Leading reported evidence
Replace thermostat
Suggestion or failed attempt
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Read evidence and context
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Suggestion
My local dealership said if I change my thermostat that I need a full ECU reflash.
Leading evidence: 'Replace thermostat' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace thermostat' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
Been running the LN low temp stat for 2+ years in northern Delaware where we get every kind of weather an temperature variation.
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Suggestion
They are controlled by the ECU (you can switch them on via Durametric or Enginuity) and they use actual coolant temp input, so I see no reason at all to make them switch on sooner with a LT T-stat.
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Suggestion
They are controlled by the ECU (you can switch them on via Durametric or Enginuity) and they use actual coolant temp input, so I see no reason at all to make them switch on sooner with a LT T-stat.
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Outcome without a verified action link
At 10-20 degrees above SOT, they are both wide open, and there is no difference.
This thread is NOT for debating the benefits of low temperature thermostat.
What I'm asking is, from the list of thermostats in Pelican parts
page
, which one is the 'correct' low temp thermostat.
As can be seen there are at least 3 brands (Wahler, LNE and MotoRad), and they vary in prices. If they are fundamentally the same, why would I get the most expensive one?
The Wahler one has this "Water Thermostat, Low Temperature (begins opening at 160 deg F) with Cover and Gasket, 996 Carrera 2/4 (1999-04)
Brand: Wahler"
~BUMP~
I was in the process of ordering a water pump and thermostat in the next day or two, and was looking at a MotoRad thermostat only vs the Wahler kit, which included the housing and gasket (seems like the latter is a idea)
Instead of starting a new thread, I am going to ask here;
My local dealership said if I change my thermostat that I need a full ECU reflash.
Has anyone heard that before?
Uh, no. Remember that these lower temp thermostats START to open at earlier temps which can help to eliminate hot spots in an otherwise perfectly functioning coolant system.
They still get nice and hot, they still produce great cabin heat, and the engine still takes a long time to cool down after a hard run. Gas mileage is not impacted and LN has determined that very slight (did I say very slight?) performance gains are a potential outcome.
Been running the LN low temp stat for 2+ years in northern Delaware where we get every kind of weather an temperature variation.
This is what I figured. Read a few threads on here and didn't see anything about it. I think it is because I am going in with my own water pump and thermo. So if they can't make money on parts, they will try to sell me a $400 ECU reflash. (He said it was to make the fans come on sooner, etc etc)
Thank you for the responses
They are controlled by the ECU (you can switch them on via Durametric or Enginuity) and they use actual coolant temp input, so I see no reason at all to make them switch on sooner with a LT T-stat. Makes no sense. The coolant temp, is the coolant temp, regardless. During SOT, an LT T-stat is just more open than the stock one. At 10-20 degrees above SOT, they are both wide open, and there is no difference.
i ordered the $40 Motorad from Pelican... it is made in Germany (US Motorad did not even know it was made at all since not avaio from them in USA). I have not put it in yet so I am watching these threads carefully... who makes the LN T-stat?
Pic on LNE site shows a Motorad insert mounted on the water inlet housing (zoom in 350percent and you can read the name on the mounting tab)... I'm feeling better about buying mine for $40 instead of $100...
I'll save the extra $60 and give that to them times 10 when I buy the LNE IMSB upgrade.
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