Skip to content
View in the app

A better way to browse. Learn more.

Ultimate Subaru Message Board

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

coolant hi/low, to close to hot, to then drop, then back

Featured Replies

I don't think I have a blown head gasket, but a little leak I saw at the bottom of the head one time, not since.

 

She stays full of coolant, I just don't like seeing the needle get close to hot, then go down to below 1/2, to then get close to hot a few minutes later.. and I mean CLOSE!

 

I am going to do a thermostat swap tomorrow, and probably a radiator cap, as it appears it has the original on there (177k miles on it).

 

Could this be a problem with the radiator, or maybe, I should go ahead and change the head gaskets (I swear no white smoke/steam, except when first started early in the morning, but dissapears after a couple of minutes, so it must be just condensation).

 

Let me know!

 

/mike

same thing that is happening with my non turbo.

+1 what McBrat said...my XT6 used to do that also.It was caused by the T stat.

 

And remember after swapping it all out you will want to make sure you burp the system after adding new coolant..an air bubble can give similar symptoms

i would start by replacing the thermostat and radiator cap.

unless it's relatively new the radiator will be suspect as well. after all these years there's no telling what the insides look like but it could easily have significant blockages.

 

it could also be a slipping belt, as it drives the water pump. if you hear any squealing or have alternator/electrical issues then this may point to the belt.

 

also the crank pulley/harmonic balancer could be slipping as well. they have a thin rubber ring in them and it can separate from the metal so the outer most part of the pulley (that the belt rides on), does not turn properly with the actual crank - therefore your water pump and other accessories won't turn as fast as they should. you should also get electrical/alternator issues with this.

Please sign in to comment

You will be able to leave a comment after signing in

Sign In Now

Account

Navigation

Search

Search

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.