Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

'99 OVERHEATING SLIGHTLY?

aracerx
 Share

Recommended Posts

aracerx Member

aracerx

Posted
Posted

This car is odd in that temp rises to about 195F and tends to stay there. I've checked with PIWIS and fans can be operated through the tester-low and high, yet the fans do not kick in over 180 degrees. the ECU sends the signal to the fan relays so I'm a bit confused. Coolant level is ok and engine performs fine. Temp is accurate according to PIWIS. Cleaned radiators of debris also

Link to comment
Share on other sites
1999Porsche911 Member

1999Porsche911

Posted
Posted (edited)
This car is odd in that temp rises to about 195F and tends to stay there. I've checked with PIWIS and fans can be operated through the tester-low and high, yet the fans do not kick in over 180 degrees. the ECU sends the signal to the fan relays so I'm a bit confused. Coolant level is ok and engine performs fine. Temp is accurate according to PIWIS. Cleaned radiators of debris also

The normal and targeted temperature of your engine is 195F. Your engine will and should never run at 180F. If you do a search, you'll find lots of info on coolant temperature. Your slow speed fans will not kick on unless the AC is on or the coolant temperature reaches slightly more than 200F. High speed fans will not kick on until you are above 215F or you have excess pressure in the AC system. Your engine will not run at 195F except under optimal conditions, including proper airflow through the radiators. During slow driving, you will likely see 215F+ coolant temps.

Do not rely on the idiot gauge to display accurate coolant temperature.

A search will also show you how to test the fan relays.

Edited by 1999Porsche911
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.