NAZ TDI
Veteran Member
What is the proper operating temperature (thermostat rating) for a 2015 Jetta TDI engine? Thanks!
TDI coolant temp?
- Thread starter NAZ TDI
- Start date
itsmejerry
Veteran Member
- Joined
- Sep 6, 2002
- Location
- Birmingham, AL
- TDI
- 2015 Passat SE TDI Nav, 2015 Passat SE TDI, 2015 Beetle Convertible TDI, 2015 Golf Sportwagen TDI All Phase 2 Emission Modified complete. 50 State Legal Diesel!
Oh sure... just like I thought, Someone just threw out a number with absolutely no data to back it up. Sheesh! 
I'd say somewhere in this range:
soldierguy
Veteran Member
I'm running a scanguage, more to watch the exhaust gas temps (and therefore help me track the regens), but I keep the water temp displayed as well.
Very consistently, the car sits at 193-197 degrees. It occasionally bumps up to 200 when I'm idling a bit before shutdown.
Very consistently, the car sits at 193-197 degrees. It occasionally bumps up to 200 when I'm idling a bit before shutdown.
meerschm
Top Post Dawg
- Joined
- Apr 18, 2009
- Location
- Fairfax county VA
- TDI
- 2009 Jetta wagon DSG 08/08 205k buyback 1/8/18; replaced with 2017 Golf Wagon 4mo 1.8l CXBB
since the original post is actually asking for the thermostat rating, the best guidance is to stick with oem parts.
the cooling system in the new engine for 2015 is not simple, and the computer is in the middle of everything.
http://pics3.tdiclub.com/data/517/820433_EA288.pdf is worth a read.
(and by the way it says the rating is 87c starts to open.)
the cooling system in the new engine for 2015 is not simple, and the computer is in the middle of everything.
http://pics3.tdiclub.com/data/517/820433_EA288.pdf is worth a read.
(and by the way it says the rating is 87c starts to open.)
itsmejerry
Veteran Member
- Joined
- Sep 6, 2002
- Location
- Birmingham, AL
- TDI
- 2015 Passat SE TDI Nav, 2015 Passat SE TDI, 2015 Beetle Convertible TDI, 2015 Golf Sportwagen TDI All Phase 2 Emission Modified complete. 50 State Legal Diesel!
It occurred to me that my 2015 Beetle TDI shows coolant temp in the digital MFA readout and not just a "needle gauge".
The coolant temp shows 195 almost always, once Ive gotten to operating temperature. It has been 199 once or twice, but drops quickly back to 195.
For those considering replacing a thermostat, I agree with Meerschm, Stick with OEM, especially considering in this age of "Things are easily and quickly ordered over the internet".
The coolant temp shows 195 almost always, once Ive gotten to operating temperature. It has been 199 once or twice, but drops quickly back to 195.
For those considering replacing a thermostat, I agree with Meerschm, Stick with OEM, especially considering in this age of "Things are easily and quickly ordered over the internet".
meerschm
Top Post Dawg
- Joined
- Apr 18, 2009
- Location
- Fairfax county VA
- TDI
- 2009 Jetta wagon DSG 08/08 205k buyback 1/8/18; replaced with 2017 Golf Wagon 4mo 1.8l CXBB
and for reference, the thermostat on my 2009 TDI was working just fine when I turned it in with 205,000 miles and nine years on it